Commercial travertine in New - New Mexico Bureau of Geology
Transcription
Commercial travertine in New - New Mexico Bureau of Geology
Introduction Travcrtine rs composed primarily of calcium carbonate'(CaCO.) as calcite and less commonly as aragonite' In broad terms, travcrtine is calcrum carbonate deposite'd in a s p r i n g s v s t t ' mt h . r tt ' r n i t se i t h e r w a r m o r t t r l d c.rrbonate-ch;rrgedwater and de'positstravertine at or near thc' surface. Travertine is tvpically related to faults and to nearbv limestone sourc(. rocks. Commercial trave-rtineis hard, dense to vuggy, finelv crystalline, compact, massive Commercial travertine in NewMexico DvGeorqe S . u;trnard Jarnesl/ Barker \ e w M tr i ; I b u r e a0ut M r n e as n dl V r n r r aRle s o u r ; eSsi t c o r r oNrv8i801 "?". .*] '',, E\d r\ FX. [t i.:. ir*d *tt- t '\hls{H --* F I C U R F . I S c l r t ' h c r a z] d { q u a r r v a t N e w M e r r c o l r a v e r t i n e q u a r n e s w , r ' s to f l J e l e n ,N e w M e x i c o D i a m o n d - i m p r e g n a t e d b e l t s a w i n o p e r a t i o n c u t t i n g c h a n n t ' l a s d r ' . ' 1 .a : l ( l f t W i r e ! i a w ' a t r F p e r r i g h t r s " p u l l i n g t h t . f l o o r " o n b l o c k p r e v i o u s l y c u t b y b e l t s a w I ' h o t r r g r a p h c o u r t t s y o f R o c k v ]r':-inch Mount;rrn Strrrrt' ( C o r t t e n t so n p a g c5 d ) to concretionaryIimestonethat takes a polish. Impurities in travertine impart colors _rangingfrom white to pink, tan, yellow brown, or dark brown. If variableimpurities causecolor banding in layeredtravertine, the stone is sometimes called tufa, calcareous sinter,marble,Metcan onyx, or onyx marble (Sandersand Friedman, igOZ);true onyx is banded silica (SiOr).Travertine,as quairied and marketed by New Mexico Travertine (NMT), includesall forms of calcite,aragonite, travertine, Mexican onyx, carbonate breccia,and altered limestonebedrockwith oxidized iron on stylolitic surfaces.Mexican onyx will be called onyx below when used in textural descriptions. NMT produces commercial varieties of stone including Temple Creme (white to creamy-whitetravertine),Scheherazade (palecream to pink travertine with onlx), Desert Creme (yellow to brown travertinewith minor onyx and lilac-or pinkish-graysections), Vista Grande (dark-reddish-b6wn to cream accordingto ASTM C-119 (Szypula,1988). Dimension stone, i.e., blocks, slabs, or Alsoin thisissue 1988 Mineraland mineralfuel productionactivities sheets of stone cut and finished to specific dimensions for structural, ornamental, or monumental uses, has becomepopular for walls, fireplaces, patio floors, and as flagstones,especiallywhere decorativeaccents and special architectural effects are desired (Austin et al., 1990).Some segmentsof the architectural market favor lightly colored travertine with a relativelyeven, muted texture. Variegated and brightly colored travertine often is consideredless adaptableas preferred color combinations change over time. Other architects prefer the more vivid colors and textures, particularly for interiors of large buildings. Travertine in New Mexico NMT is one of three dimension-stone operations producing travertine in the United States;the other two are in Idaho and Montana. NMT quarriesabout 400short tons (st) of stoneper month from extensive,well-bedded, laminar lensesof travertine(Fig. 1) just east of Mesa Lucero in the easternfoothills of MesaAparejo. The travertinequarriesare 25 mi west of Belen (Fig. 2) in secs.12 and 13,TsN, R3W on U. S. Bureauof Land Managementand private lands. Travertine is widespread in New Mexico (Kottlowski, 1965).About 50 discretedeposits are known (Barker,1986,1988)with many additional ones occurring in the extensiv-e limestoneterrainsof New Mexico.The nearest large deposit, on trend with the Mesa Aparejo travertine, is a few miles north of the NMT quarrieson the LagunaIndian Reservation at Mesa Lucero. Other large occurrences (Fig. 2) are west of Sierra Ladrones (Barker, 1983)and at Mesa del Oro (ficha, 1956,1958).Minor production of travertine p. 59 Service/News Upcomingmeetings NMBMMRMineralMuseum notes Mineralsymposium slide competition p.65 p. 66 p.72 p.74 p.75 Goming soon Monero coal field 1989 discoverwells Lava Creek B tephra August 1990 Mesa del Oro \\\' p.75 p.76 Staff notes To Santa Fe 6i ^:l !i p.75 Nalr Mexico Geology General geology of Mesa Aparejo Limestone of the Pennsylvanian Madera Formation in the subsurface to the west is probably the primary sourcerock for the carbonate-rich water that formed the Quaternary travertine at the edge of Mesa Aparejo (Gray Mesa). The lower 800 ft of the Madera Formation are well exposedjust west of the NMT travertine quarries (Kelley and Wood, 1946;Titus, 7963;Cooper, 1964)and probably represent the Gray Mesa Member of the Madera (Kelleyand Wood, 19r[6;Kuesand others, 1982).Other bedrock units nearby include PennsylvanianSandia Formation, Permian Abo and YesoFormations, and Precambrian granite and schist.Kelley and Wood (1945), summarized by Titus (1953), showed the structuraland shatigraphicrelationships(Fig. 3) of MesaAparejo (Gray Mesa).Hammond (1982)summarized regional stratigraphy and structure south of Mesa Aparejo; Slack and Campbell (1976)summarized structure to the north. Cooper (1964) was concerned primarily with the travertine. Alarge northeast-trendingfault mostly west of the travertine (Fig. 4), mapped as a normal fault dipping 70oeastward by Cooper $9e), New A4exfic@ GEOLOGV o SGienGe andService NMGS spring meeting abstracts CimarronCanyonStatePark Mineralsof NewMexice-a photogallery also occurred during the 1970'sin south-central New Mexico about eight miles northwest of Radium Springs in sec.23, T21S,R2W. ':< ..'T.r t,'t' / / lRocky Mountarn -fd.stone Volume 12, No. 3, August 199O Editor:Carol A Hjellming RebeccaTitus Drafting assistance; Published quarterlyby New Mexico Bureau of Mines and Mineral Resources a division of New Mexico lrstihrte of Mining & llrchnology BOARD OF REGENTS Ex Officio Carrey Canuthers, Gouernorof Nru Mexico Alan Morgan, Suryrinfendentof PublicInstruction Appoinred Steve Tones, Pr6., 1967-1991, Albuquerque Carol A. Rymer, M.D., SeclTrss.,1 9-1995,Albuquerque Robert O Anderson, 1987-193, Roswll Lenton Malry, 1985-191, Ahuquerque Lt Gen Lrc Marquez, l9f39-1995,Albuquerque New Mexico Institute of Minint & Technology Prqidnt Laurence H Lattman New Mexico Bureau of Mines & Mineral Resources Directoland StateCeolosist Frank E Kottlowski Assxiqte Directol JamesM Robeitson Subsgriptions: lssued quarterl, February, May, August, November; subsription price $6 00/calendaryear EditotialMttq: Articles submitted for publication should be in the editor'shandsa minimum of five (5) months before date of publication (February,May, Autust, or November) and should be no longer than 20 typewritten, double-spacedpages All scientfic papen will be reviewed by at leasttwo people in the appropriate field of study Addressinquiries to CarolA Hjellming, Editor of Nn MexicoGmlogy,New Mexico Bureauof Mines & Mineral Resources,Strorc, NM 87801 Publishedas public domln, thar4ore rcprdrciblc without pqmission Sourcecredit rcquested Circulation:1,ffi Prin,eri University of New Mexico Printing Plant is the Comanche thrust fault of Kelley and Wood (1946),which dips shallowly to steeply westward. The dip of the fault varies considerably in the vicinity of Mesa Aparejo. Cooper's interpretation seems correct because it is based on drill-hole data. on observation of the fault plane in outcrop at the travertine quarries, and is consistentwith the downdropped Paleozoicsectionjust east of the fault. With respectto rocks to the west, the Madera and other bedrock units east of Mesa Aparejo have dropped severalthousand feet into the Albuquerque-Belen Basin portion of Mesa Aparejo ( G r a yM e s a ) [3 F UNITS D E S C R I P T I ON Oal lPmg the Rio Grande rift. Sandstone, conglomerate, and mudstone of the Tertiary Santa Fe Group now overlie downfaulted older bedrocks units and lap onto Mesa Aparejo. The Comanche fault and associatedminor faults acted as conduits and continue to influence Oal Alluvium (Quoternoryl-volley fill; sondywoshes Op Pediment grovel (Quoternory)-severol levelswiih somecolicheinlerbeds Ot bonded, of colciumcorbonote; Troverfine (Quoternory)-spring deposits lominoted,ond frogmeniol;relotedlo oncienlspringsolong foult Py YesoFormotion,upper port o{ LosVollos Member (Lower Permion) ond sholewith minorgypsum ton-brown,frioble siltstone,sondstone, Pa Abo Formotion (Lower Permion) red-brown,fine- to coorse-groined interbeds ond sholewith minor limestone sondslone.siltsJone. lPma Modero Formotion, Ahosodo Member (Upper Pennsylvonion fu mndstone to dork-groylimestone,shole,ond conglomerotic IPmg Modero Formotion,Groy Meso Member (Middle Pennsylvonion) cherty,thick-to thin-beddedlimeslone groy to dork-groy,predominontly with minor sholeond sondstone [Psu Sondio Formotion,upper clostic member (Middle Pennsylvonion) shole,conglomerole, groy to block orenoceousltmestone,corbonoceous ond sondsione roy Pink groniie ond ossocioted green chlorite schist (Precqmbrion) highlyfroctured FIGURE 3-Geologic map of Mesa Aparejo (after Kelley and Wood, 1946;Titus, 1963;Kues et al., 1982).A-A', approxirnateline of the diagrammatic cross section for Fig. 4. SE Comanche ault FIGURE 4-Diagrammatic section acrossthe Mesa Aparejo travertine in secs.12 and,13, T5N, R3W showing the overlapping east-westrelationship of Quaternary travertine with Permian bedrock at Precambrianinlier. SeeFig. 3 for unit descriptions. Note the normal dip of the Comanche fault and the lateral changesin travertine variety (modified from Coopea 1964). Nm MexicoGeology August 1990 circulationof carbonate-charged ground water and spring water. Precipitation of calcium carbonate in a spring system occurs when carbonate-rich waters become supersaturated because of either evaporation of water or loss of carbon tabolism (Chafetzand Folk, 1984).Travertine was deposited as extensive,thick, laminar lensesat MesaAparejo. Travertinepresently being deposited-fromsprings just'north of Mesa Aparejo in secs.35 and 36, T5N, R3W illustrates one way older and larger deposits may have formed (Fig. 5). The varieties of travertine at MesaAparejo are distinguished by color and structure, but the mineralogyand origin arefundamentally the same foi- each. n"eaaingis commonly laminated with characteristic serrations probably representing the forward surfaceof a micro-terraced rimstone dam that impounds a pool of spring water from which limestone is deposited (Fig. 5). Concretionary massesof various dimensionsare largely due to algal activity. Rod-like structures, frequently upright and clustered in tufts or masses/may be algal or bacterialwhen microscopic,but most likely representdeposition around grass,stems, or branches.Holes 1984), are locally abundant. :a The highly variable color of the Mesa Aparejo travertine is a result of impurities. Pink and red are probably primary and result from inclusion in the travertine of red iron oxide from nearby Permian sandstone, siltstone, and shale. Yellow and brown are secondary and were produced close to the surface by percolating oxidizing waters during case hardening and weathering of the travertine. Onyx is translucent calcium carbonate in which layers parallel the surfacesof infilled voids or laminae, and is intimately associated with travertine.Most onyx, now calcite, w a s d e p o s i t e do r i g i n a l l y a s a r a g o n i t e ,a metastable higher-temperature form of calcium carbonate. Local coarse-grained aragonite is associatedwith spring orificesmainly in the Apache Golden Vein portions of the Gray Mesa Member of the Madera Formation. Becausearagonite is more soluble than the calcite, advanced dissolution forms soft crumbly zonesand largevoids later filled with clay or mud (Cooper, 7964). Travertine is quarried by NMT for slabs (typically 4' x 8' sheets,3/q-inchthick) and ashlar (rectangularpiecesof sawn or roughhewn stoneof non-uniform size).Travertine fragments are marketed as rubble (roughhewn irregular blocks or boulders)and crushed stone (broken stone in smaller sizes). Temple Creme (Fig. 6,4'),white to creamywhite travertine, resemblesbetter grades of Italian travertine and normallv occursin lavers lessthan 5 ft thick intercalitedwith othir varieties. It also occursin one sizablebodv containing 7-8 million ft' of stone (Coopei 1964).However, the highest quality reserves are limited and the bodv - has not vet been quarriedeconomically. Scheherazade(Fig. 58) is a pale-creamto pink to gray travertine/onyx that, although present in large quantities, is variable in soundness or freedom from flaws (Power, 1983, p. 178). Cooper (1964)believed that deeper levels in the deposit would yield excellentcommercialmaterial.He estimatedthat the entire property containedabout8 million ft' of Scheherazade,making it the most abunCommercial varieties of NMT travertine dant travertine/onyx variety at the NMT The six varietiesof travertineproducedby quarrres. NMT (Fig. 6) vary in detail within a given Vista Grande (Fig. 6E) is formed by imlayer but are laterallv consistent for hunpregnation of Scheherazadetravertine/onyx dieds of feet. Severaladditional varietiesof bv secondarvcalciteand brown iron oxide. travertine have been identified in the Mesa Cboper (1964)estimated reservesof 7.75 mrlAparejo area but have not been quarried. lion ft' but stated that large production of Sucha wide variety of types within one trav- Vista Grande as dimension stone could not ertine depositis very unusual.Cooper(1964) be achieved. However, Vista Grande now conservativelyestimated that the NMT quarsuppliesmost of the rubble and cmshed stone ries contained reservesof about 49 million producedby NMT and only a limited amount ft3 of associatedtypes of commercial-quality of slabsand ashlar. travertine and altered limestone (Table 1). Desert Gold (Fig. 5D), a yellow-gold travTravertineof all types underliesabout 1,140 ertine, has abundant onyx within the domacres and may total about 200 million short inant travertine. Many voids must be filled tons (st) in place (Barker,L988). with epoxyor cementgrout during finishing. The grout, along with case-hardeningiron oxide, yields a pleasingappearanceand increased strength. Cooper (1964)estimated 'i reservesof 1.5 million ff of Desert Gold. Desert Creme travertine (Fig. 5C), as described by Cooper (1964),commonly underlies Desert Gold and varies from pale lilac gray through mauve to pinkish gray. Nearly every block and slabof Cooper'sDesertCreme containeddisseminatedblack limestoneclasts generally less than 1 inch, but occasionally 6 inches in diameter. Cooper (1964) estimated reservesof about 4.2 million ff of Desert Creme.Travertinequarried now asDesert Creme is higher stratigraphically than that described by Cooper but is not equivalent to Desert Gold. It is mainlv vellow to brown with minor onyx and lilic- or pinkish-gray sections;limestoneclastsare absent. Apache Golden Vein (Fig. 6F) is a yellowto reddish-gray limestone of the Gray Mesa Member of the Madera Formation. It forms M9lE^-l. Lt"senFday formation of travertine near the northern end of Mesa Aparejo (SErL sec. 35, T6N, R3W). The spring supplying this travertine issues from the Madera Formaiion-and is about r/s mi upstream to the west. Note hammer handle in lower left for scale.View is to the northwest. August 1990 Nm MexicoGeology FIGURE 6-Polished slabs of the six varieties of commercial stone marketed bv Rockv Mountain Stone: A, TempleCreme; B, Scheheraiade;C, Desert Creme; D, Desert Gold; E, Vista Grande; and F, Apache Golden Vein. Each slab is 1 fP. A C B \e.--*o*-, ;ilu" *isr;; **. * D i"' NczoMc-ririr (;coltttq August 199t) as the cut is made, then is moved forward and the wire is shortened; this processis repeatedas often as necessaryto complete the cut (Fig. 8). The cut may be any orientation from horizontalto vertical.Largeslabs of rocks are also prepared by a rail-mounted belt saw that cuts as deep as 10 ft (Fig. 1). Until recently, most cutting of travertine was done bv the wire saw' but now much of the work ii done with great precision and high output by the'belt saw. After being broken or cut loose, 150-300st slabs are tipped over using hydraulic wedges.The blocksfall away from the working face and onto loose debris to lessen breakage(Fig.9). They aresplit or sawedinto 15-20-stblocks, graded, processedon site, or loaded onto flatbed trucks by large frontend loaders or forklifts and hauled to the dressingplant. Low-gradeblocksand waste from the quarrying procedure are crushed on site by severalmethods. This material is marketed as palletized rubble (larger sized) or as crushed stone (smallersized). TABLE 1-New Mexico Travertine reservesby commercial name (Cooper, 1964;NMT, oral communication 1990). Composition and Texture Temple Creme travertlne Scheherazade Reserves (million ff) Remarks 7.7 Top grades mined out travertine/onyr( 8 Most abundant type; variable soundness Vista Grande travertine/onyx 7.75 Case-hardened Scheherazade Desert Gold travertineionyx 1.5 Onyx abundan| strong Desert Creme travertine/onyx 4.2 Disseminated black limestone clasts Other varieties travertine/onyx 74.7 subtotal Apache Golden Vein altered Madera limestone TOTAL -t14 million ft' Saw Apache Golden Vein may be more widespread off NMT property; it rs not travertine. 5 -49 million ff prominent but thin ledgesmid-slopeon Mesa Aparejo. The limestone has been partly altered, perhaps during emplacement of the travertine (Coopea 1964)downslope to the east. Closely spacedand anastomosingstylolites of the original limestone have been oxidized to bright golden,yellow iron oxide. Apache Golden Vein varies from 0 to 15 ft thick at the NMT quarries. Severalmiles to the southwest similar limestone in the Gray Mesa Member can be 50 ft thick. Atthough Cooper (1954)estimated about 5 million ft' could be recovered, he did not consider Apache Golden Vein to have sufficient market appeal to warrant extraction.NMT has succeededin developing this market but only TABLE 2-Saws Includes "Saladin Onyx," "Mescalero Onyx," and "Sioux Breccia" sellsApache Golden Vein as polished slabs, a relatively low volume activity. Quarrying procedures at NMT Blocks of travertine are cut with a wire saw, a belt saw or both (Table2). A Vermeer concretesaw is used to remove caprockoverlying the travertine. During wire-saw operation, intersectingdrill holesproducea path through which a wire impregnated with industrial diamondsis drawn. The wire is connected in a continuous moving loop and pulled under tension as it cuts through the travertine toward a wheel on tracks(Fig. 7). The wire saw is moved backwardon the track Milling proceduresat NMT The NMT finishing plant is about two miles west of Belenoff Exit 191of Interstate25 (Fig. 2). The Belenplant can produce 2,000to 3,000 ff of travertineslabsper day,but the variable amount of custom work commonly lowers output. Gradedand stockpiledquarry blocks are trimmed square using a small wire saw, similar to the processat the quarry. Most blocks at the plant are cut into slabsin an adjustableGasparigang saw that has as many as 75 diamond-impregnatedbladesindividually adjustablefor width of cut (Table2, Fig. 10). The gang saw usually is set to produce 3/r-inch-thickslabsthat are then moved to an automatic Gregori polishing line. used at the New Mexico Travertine quarrv and mill west of Belen, New Mexico Cut Dimensions Cutting Method Abrasive Remarks Quarry Wire saw 25'deep x 40'long cable pull 3/ro"cable drawn through connected drill holes industrial diamond 3lc" x 3la" diamond segment every ltlz" separated by spring sPacers Belt saw lO'deep x 50'long (rail in 10' increments) ltlz" belt on movable arm industrial diamond Automated advance and shutdown (water pressure lost or excess amPs drawn); waterjets around perimeter of arm Concrete saw 34" deep x unlimited (tracked vehicle) 7'diameter wheel tungsten carbide tips Used to remove caprock waste as many as 75 reciprocating blades industrial diamond Spacing of blades is variable rotating blade industrial diamond Accurate to 0.2 mm; can cut special shapes Mill Gang saw Bridge saw August 1990 Nao MexicoCeology length wrre saw uncut t r a v e r tnt e FIGURE 7-Diagrammatic representation of wire-saw operation during a vertical cut through connected drill holes. The cable loops from the motor through an inclin6d drill hole behind the face, through an intersecting horizontal drill hole near the base of the face, and back to the motor. (Source: Benetti Macchine, Italy) FIGURE8-Wire saw,with diamond-impregnated cable,in operationat New MexicoTravertinequarry. Photograph courtesy of New Mexico Travertine. FIGURE 9-Large travertine slabs are tipped over using hydraulic wedges, then processed into blocks or rubble. Man on skyline for scale. Photograph courtesy of D. W. Love Nm Merico Geology August 799O The Gregori polishing line removes small ridges produced by the gang saw, yielding a smooth, highly polished, flat surface (Fig. 11).During cutting and polishing, the stone is flushed with water, which removes clay and mud in the voids. Beforefinal polishing, a waterproof, appropriately colored grout is applied, if needed, to the slab surface,filling the voids and partially cementing the stone. Epoxy grout has a shiny surfacein polished travertine slabs. Cement grout-filled voids appear dull compared to the flat portions of FIGURE l0-Adjustable Gaspari gang saw used to cut stone blocks into slabs.The block was about 4 ft wide before it was slabbed. the stone, but colors of either fill are chosen to blend well with the highly polished surfaces. Some slabs may be backed with fiberglas mesh and epoxy to strengthen them further. Complex angle and other cuts are made with a computer-controlled Gregori Impala bridge saw (Fig. 1.2)accurateto 0.2 mm. The bridge saw is used to cut polished slabsinto special shapes. Ashlar is made by breaking thick travertine slabs in a hydraulic knife or guillotine (Fig. 13). Finished slabsor blocks FIGURE ll-Gregori FIGURE l2-Computer-controlled Gregori Impala bridge saw used to cut complex angles and shapes to close tolerances. August 1990 Nm MexicoGeology are packed or placed on pallets and shipped to customers. Travertine is porous and its physical properties vary more than those of denser materials (Table 3). This is particularly true of its modulus of elasticity and coefficient of linear expansion.Much travertineis used as flooring; porosity is not deleterious for this end use as shown by the much higher abrasion resistanceof porous Temple Creme compared to Apache Golden Vein with far fewer visible pores. polishing line used to produce highly polished travertine slabs. FIGURE 13-Workmen break sawed blocks into ashlar, which is placed on pallets for shipment to customers. The blocks are unsuitable for slabbing g^!e!fE rytysical test data for NMT Temple Creme travertine reported by Albuquerque Testing Labs [ATL], unless noted as reported by Testwell Craig. [TC].^\MT Apache Golden Vein [AGVj, concrete, and marble data included foi compariJon. a, North Carolina (NC), Veimont, or Georgia marble; b,0.2 of ultimate compression;-, not available. Temple Creme Procedure Compressive shength (psi) ASTM C17O_50 Shear shength (psi) Modulus of rupture (psi) Modulus 4" rubes in Tinius Olsen tester of elasticity Range Mean Value Other Materials AGV Concrete Remarks 6110 3816to 7536 2500to 5000 7400 to 11,300 Tinius Olsen tester 1702 914 to 1442 ASTM C99_52 1105 92 to 1133 r200" 750to 900 718 to 3133 0.55to 1.3x 105 3 . 5 t o sx 1 0 5 7x1,ff 0.92x lff Large voids : 3815 horizontal grain 1600b Horizontal grain eastern marble (NC) 718-3133 +20% fuom mean allowed all pass Horizontal grain low due to Poroslry Specific gravity ASTM C97_83 Coefficient of linear expansion heated 8 hours Absorption ASTM C97_83 Abrasion resistance ASTM C24T Skid resistance ASTM E303(dry) (wet) Scaling resistance ASTMC672 2.37 7.37IATLIto 2.71lTCl 1.391x 10 5 0.9686 to 1.57x 10-6 0.92 2.32 3 . 2 t o 7 . 8x 7 0 6 2.48[TCl 2.69 to 2.74 5.6x106 0.89to 0.97 sample reiected as >15% below mean 24.67lTCl 3e [rc] 1e[rc] 0.1%loss 11.37[TC] 50 rycles TABLE 4-Travertine production by New Mexico Travertine. Data in short tons and by commercial name and product. Production by NMT Production recordsof NMT for the last five years (Table4) show salesof six commercial varieties of stone and four types of product: slabs,ashlar,rubble, and cmshed stone.Data for Desert Gold and Desert Creme are combined. Crushed travertine production was volatile over the five-year period. Production trends show a general increase in all travertine varieties since start up (Fig. 14A), particularly for Vista Grande, Temple Crelm, and Scheherazade.Vista Grande and Desert Gold,/DesertCremewere very popular in 1982 principally as crushed stone and rubble respectively(Fig. 1aB).Productionof slabs(the most expensivetravertine product) has risen substantially for all varieties except Vista Grande. Temple Creme slabs are the most popular, but lack of high-quality reserveswill Iimit future sales. The production of rubble has varied widely among the five types of stone used, but Vista Grande is most popular. Rocky Mountain Stone Company (RMS) markets stone for NMT. Finished travertine is displayed at the RMS stoneyard in Albuqlerque on the Pan American Highway (frontageroad) west of Interstate25 and south of the fefferson exit. Some travertine is shipped to sculptors for carving or to marble shops and dealersprimarily for distribution to furniture manufacturers. RMS aggressively markets their products in many parts of the United Statesand has sold large quantities of stone in such distant statesas New fersey and Washington. RMS travertine products are now beginning to penehate international stone markets as well. 13 1985 1988 1989 Temple Creme slabs ashlar rubble crushed total 5.69 0 r24.58 23.00 t53.27 84.38 0 369.60 0 453.98 247.42 312.50 r90.47 47.50 797.83 r34.t1 373.24 246.00 25.M 778.75 432.94 301.72 759.71 0 893.77 1.13 0 &.43 8.00 73.55 7.98 0 r94.48 30.00 232.46 35.39 0 M0.48 118.01 593.88 29.41, 724.U 205.A 726.92 486.67 46.96 347.23 749.05 56.80 594.04 T6.M 0 397.28 3M.45 718.17 36.64 0 302.47 730.U 7069.95 3.46 0 478.29 2280.85 2762.ffi 4.96 0 390.55 872.35 1267.86 6.26 10.15 494.92 745.77 1257.70 7t.07 &.48 75.55 25.25 r02.67 727.86 5.00 240r.40 2406.40 17.t6 308.70 379.86 60.01 210.s0 270.57 4.48 20.59 39.74 17.25 72.83 Scheherazade slabs ashlar rubble crushed total Vista Grande slabs ashlar rubble crushed total Desert Gold/Desert Creme slabs rubble total Apache Golden Vein slabs TOTAL 1025.03 1904.85 6599.85 28M.34 Nm MexicoGeolo3y August 1990 3028.25 A 3000 2750 2500 O .c 22so AcxNowI-rpcuurvrs--We benefited significantlv from reviews by Vince Lardner of Rocky Mountain Stone and New Mexico Travertine, and by our colleaguesAugustus Armstrong, Gretchen Hoffman, Frank Kottlowski, and Edward Smith. BeckyTitus photographed the blocks for Fig. 5 and Jonathan Cheney drafted the line drawings. Q zooo n ,- 1750 \ts References r nnn Visto Gronde a 1250 C r) F 1000 ^ -c @ j 750 Temple Creme \ Scheherozode 500 Desert Gold/Desert Creme 250 n 1 1987 1986 1988 Apoche Golden Vein 198S B 3500 3000 O ,-P t- O O IUUU ts a\ 1500 a C Rubble Crushed Ashlor S l ob s o 1000 F I -C 500 a ---z 0 19 8 5 1 1987 1988 1 production, in short tons, for 1985-1989 by New Mexico Travertine by comFIGURE l4-Travertine mercial name (A) and type of product (B). The future Vince Lardner, owner of NMT and RMS, has an interesting oPinion about competition; he wants it. Several established travertine operationsin New Mexicowould helP expandhis own market by making the state, as well as his comPanies,better known to architects for dependable grades and quantities of high-qualitystone.Lardnercautions that such operations must be well financed, use the latest technology,and be run by comAugust 1990 Nr.u MexicoGeologY petent managerswho would actively Pursue sales.Without that commitment, they would stand little chance of success. NMT has large reservesof quality material near Mesa Aparejo and looks forward to many more years bf operation. They are developing other travertine deposits in the region. Given the abundance of travertine occurrences in New Mexico, severalof very good quality, Lardner may get his wish for competition. Austin, G. S., Barker,f. M., and Smith, E. W.' 7990, Building with stone in northem New Mexico: New Mexico-GeologicalSociety,Guidebook to 4lst field conference, in press. Barker,J. M., i983, Preliminary investigation of the origin of the Riley travertine, Socorro Counry New Mqico: New Mexico Geological Society,Guidebook to 34th Field Conference, pp. 26927 6. Barker, J. M., 1985, Travertine: New Mexico Bureau of Mines and Mineral Remurces, Open-file Report 229, pp. 94-100. Barker, J. M., 1988,Travertine quanies and deposits in New Mexico (abs.):New Mexico Geology,v 10, no. 3, p. 68. Chafetz, H. S., and Folk, R. L., 1984,Travertine--depositional morphology and the bacterial constructed y, constituents: Jbumal of Sedimentary Petrology, v. pp.289-375. Cooper, B. N., 1964, DePosits of travertine, onyx-,and mrble along the east base of Mesa Aparejo. Valencia County, New Mexico:Unpublished rePort to Ultra Marbles, Inc., Albuquerque,66PP. Fisher, R. A., 1979,A biochemical study of the Recent calcite deposits along the Lucem uplift, ValenciaCounty, New Mexico: Unpublished M.S. thesis, New Mexico Institute of Mining and Technology, 152 pp. Hammond, C. M., 1987,Geology of the Navaio Gap area between the Ladron Mountains and Mesa Sarca,Socorro Countv, New Mexico: Unpublished M.S. thesis, New Mexico lnstitute of Mining and Technology,212 PP. Jic-hi,H. L., Jr., 1955,A deposit of high-calciumline rock in ValenciaCounty, New Mexico: New Mexico Bureau of Mines and Mineral Resources,Circular 36, 5 pp. Jicha,H. L., )r., 1958,Geology and mineral resourcesof Mesa del Oro quadrangle, Socono and ValenciaCounties, New Mexico: New Mexico Bureau of Mines and Mineral Resources,Bulletin 56,67 pp Julia, R., 1983,Travertines:Arnerican Association of Petroleum Geologists,Memoir 33, pp. 64J2., Kelfev V C., and Wood, G H', 1946' Geology of the Luiero uplift, Valencia,Socono, and Bemalillo Counties, New Mexico: U.S. GeologicalSurvey, Oil and Gas Investigations, Preliminary Map 47, scale.1:63,360.Kottlowski, F. E., 1965, Limestone and dolomite: New Mexico Bureau of Mines and Mineral Resources,Bulletin 87, pp. 345-353. Kues, B. S., Lucas,S. G., and Ingersoll,R. V, 1982 Lexicon of Phanerozoic stratiSraPhicnames used in the Albuquerque area: New Mexico Geological Society, Guidebook to 33rd field conference,pp. 125-138. Myers, D. A.,7973, The upper PaleozoicMadera Group in the Manzano Mountains, New Mexico: U.S. Geological Suruey, Bulletin 1372-R 13 pP Powir, W. R., i983, Dmension and cut stone; in Lefond, S. J. (ed.), Industrial minerals and rocks:American Institute of Mining, Metallurgical, and Petroleum Engineers, New York, 5th edition, pp. 151-181. Sanders,J. E., and Friedman,G. M-' 7957,Origin and occurrence of limestones; in Chilingar, G V., Bissell, H. J., and Fairbridge, R. W. (eds.), Carbonate rocks, origin and classilication: Elsevier, New York, Developments in Sedimentology 9A, pp. 776-177.. Slack,P B., and Campbell,J. A., 1975,Structural geology of the Rio Puerco fault zone and its relationship to central New Mexico tectonics:New Mexico Geological Society,SpecialPublication 6, pp. 46-52. SzypulJ, A.; 1988,Self evaluation of Temple Creme and Apache Golden Vein: unpublished report, ltstwell Craig Laboratodes, 4 pp. Titus, F. 8., Jr., 7963,Geology and ground-water conditions in eastern Valencia County, New Mexico: New Mexico Bureau of Mines md Mineral Resources,Groundwater Report 7, ll3 PP. tr