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PRELIMINARY GEOLOGIC MAP OF THE NEAL HOT SPRINGS
NEVADA BUREAU OF MINES AND GEOLOGY OPEN-FILE REPORT 12-X PRELIMINARY GEOLOGIC MAP OF NEAL HOT SPRINGS GEOTHERMAL FIELD, MALHEUR COUNTY, OREGON Prepared with support from the U.S. Department of Energy 56 57 58 59 460 61 62 63 64 65 66 67 117˚23'59“W 44˚05'07“N 81 QUATERNARY DEPOSITS Anthropogenic Features and Deposits 81 @ ¦ @ @ Siliceous sinter mounds (Holocene to Pleistocene?) Qss Silicified sediments, undivided (Holocene to Pleistocene?) Tbc Gravel deposits (Pleistocene to Pliocene?) QThbr Hydrothermally altered breccia (Pleistocene to Pliocene?) QTss Silicified rocks, undivided (Pleistocene to Pliocene?) Tbc Tbc Dacite scoria (Pliocene?) Tlm Fossiliferous limestone (Pliocene to late Miocene?) Tid Idaho Group sedimentary rocks, undivided (Pliocene to late Miocene) Tgyb Sourdough basalt (late Miocene?) Tbn Neal basalt (late Miocene?) Tbcg Bully Creek conglomerate Tbc Bully Creek Formation sedimentary rocks, undivided (late Miocene) Tav Vines Hill andesite Tds Drip Springs Formation, undivided (middle to late Miocene) Trbr Rhyolite sedimentary breccia Thcg Hog Creek conglomerate Thb Hunter Creek basalt Thcs2 Hog Creek Formation tuffaceous rocks Trcm Cottonwood Mountain rhyolite Tbsc Basalt scoria and lapilli Thcs1 Hog Creek Formation tuffaceous rocks Thcs Hog Creek Formation, undivided (middle Miocene) : 55 Tav Tbc 5 o Tbc ª ª ª Tbsc Exploratory Injection Production ª Temperature Gradient # 40 ! XRF geochemical sample locality showing sample number 39 Ar/ Ar sample locality 5,000 Neal fault Hope Butte fault Thcg Tbsc Qc Tbc Qfi Qc Qfi Qfi Tbc Qfo Qc Tbc Tds Tbc Tds Thb Qfi Qa Qc Tid Thb Thcs1 Thb Trcm Thcs1 Tbm Thcs1 Tbm Qfi Thb Qfo Qfy1 Qc Qfy1 Qfi Tid 2,000 Tds Tbm Tbm Trcm 3,000 Qa Qf Tbc Thcs1 Thb 1,000 Tbm Thcs1 Thcs1 Qfi Thcs1 Tid Thb Trcm Qfi Trcm Trcm Thcs2 Trcm Tbm Qc Qfo Qc Qfo Tbc Thcs2 Tds Trcm Trcm Tbm Thb Tbc Tds Tds Thb Qfy1 Qfy1 Qfi Qa Qc Qfo Qc Qc 4,000 Trcm Thcs1 Tbm 0 Thcs1 W E Qfo Tgyb Qc Tbc Tbc Tbc Qfi Qfi Tbc Tgyb Qfy Qfi C’ C 71 Meters 2,000 Qfi 48 63 Feet Bend in Section Qfy 64 65 66 67 A-A’ Projection of TG-7 70 1,000 Tds Thb Trcm Thcs1 Thb 500 Projection of NHS-11 Thcs1 Thb Trcm Qc Qfi Qfy1 Qa Qfy1 Tbc Tid Tds Thb Thcs2 Trcm 0 Tbn Tbc Thcs1 Thb Tbm Qa Qc Tsd Qa NHS-5 Tds Thb Thcs2 Trcm Tds Thb Thcs2 Trcm Thcs1 Thb Tbm Thcs1 Thb Tbm 4,000 Neal fault Hope Butte fault Qc Qf Qa Qc Qa QaQf Qf Qa Tbc Tbc ? Qfy1 5,000 Projection of well TG-19 Sugarloaf Butte fault Qa Tbm A Meters 2,000 Tds Qf Qfi Qf Tav Qss QTg Thcs2 Trcm Qa Thb Tds Thb Thcs2 Trcm Thcs1 Thb Tbm Thb Thcs2 Trcm Thcs Thb Thcs Thcs1 Tbm Thcs Tbm Tds Tds Thb Thcs2 Trcm Trcm Thcs1 Thcs1 Thb Thb Tbm Tgyb Qc Tbc Tbc Tav Tbc Tav Tbc Tav Tid Tid Tgyb Qls Qf Thcs1 Thcs Thb QTg Tav Tds Tds Thb Thcs2 Trcm Thb Thcs2 Thcs1 Thb Thcs1 Thb Trcm Tbm Tbm Tbm Qc Tgyb Qc 3,000 lake Tbc Tav 2,000 Tds Thb Thcs Trcm Thcs1 Thb Tbm E W 1,000 0 A’ Bend in section 1,500 Sugarloaf Butte fault Qfo Thb Qfo Qa Tbc Qc Qc Qc Tbc Tds Thb Trcm Qfi Qfi Qc Qc Tds Tds Trcm Thb Thcs2 Thcs2 Trcm Thcs1 NHS-3 Thcs2 Qc Qc Qfi Qa Qfo Tbc Qf Thcs1 500 Qf Tds Trcm Trcm Thcs1 Thb Trcm Thcs1 Thcs1 Tbm Tbm Tbm Tbm Tbm Feet Bend in section B-B’ Neal fault Cottonwood Creek fault C-C’ Projection of Projection of well NHS-5 well NHS-8 NHS-1 Projection of NHS-2 well NHS-13 Qfi Tbc Tav Tds Thb Thcs2 Trcm Thcs1 Thb Thcs Tbm N Thcs Thcs1 Qfo Joel H. Edwards, James E. Faulds, and Mark Ferns 2013 0 Well-Field Thcs2 Feet Sugarloaf Butte fault 72 Qfo PRELIMINARY GEOLOGIC MAP OF THE NEAL HOT SPRINGS GEOTHERMAL AREA, MALHEUR COUNTY, OREGON 1,000 A' B' Tbc @ o @ 62 Thcg A-A’ 500 Tbc @ 61 Trbr @ 60 Line of cross section Tbm 43˚58'42“N 59 Vertical B Meters 2,000 1,000 48 58 Inclined A Tds 1,500 57 Strike and dip of flow foliation in volcanic rocks Tgyb Tbc 117˚32'47“W Horizontal Vertical Qf Tav 4 e v ¨ Inclined Malheur Gorge basalt Tbc Tbc : @ Tbc 73 Tav Tav 41 Columbia River Basalt 0 Qfi Qfy o ¦ Trcm Thb Tbc 5 : Qfi K Strike and dip of bedding Tbcg Thb Tds Tbc Tbc Tbn Tgyb Tbc Tbc Qfi S Monocline Long-dashed where approximate, dotted where concealed. Arrow shows direction of dip. Syncline Long-dashed where approximate, dotted where concealed. Miocene Tsd Tbc Qa Qfy Tbc S Tlm Tid 1,500 Tgyb Qfi F Anticline Long-dashed where approximate, dotted where concealed. Tsd PLIOCENE AND MIOCENE ROCKS Tertiary @ o : Qf Qc Geophysically inferred fault QTg @ e @ : Tbc Qa Tbc 4 Qfo QTss QThbr Qfo ? Mainly strike-slip fault Solid where certain and location accurate, long-dashed where approximate, dotted where concealed; queried if identity or existence uncertain. Arrows show relative motion. Qss Qfi Pliocene @ @ @ Qfi 24 Quaternary Qst @ : @ : Qfy1 @ o Fan alluvium, undivided (Holocene to early Pleistocene) Qc Bend in Section Tbc : : Qf Qfo Tav 70000m. N Old fan alluvium (middle to early Pleistocene) Qf @ 10 Qfi Tgyb Qc 20 Qc Tgyb Tbc Qc Qfo Qfy1 Tbc Qfy1 Tbc Tav Tbc 74 Tgyb e : ¥ Qfi Qfo 24 Intermediate fan alluvium, undivided (late to middle Pleistocene) Qls Tgyb Tgyb Tid Tgyb Tbc Qfi Qa Qfi 21 @ Qfy1 Pleistocene @ o Ü Ü @ ¦: : : ¦ %: Qfo ? Normal fault Solid where certain and location accurate, long-dashed where approximate, dotted where concealed; queried if identity or existence uncertain. Ball on downthrown side. @ @ o @ : : oo % @ : @ o% F e @ e @ @ @ : : M : @ : : e : F o o : : : o : F ¦ ¦ ¦ ¦ ¦ : Tid 24 Qfi Tbc Tgyb 3 Tbc 26 Tlm o Holocene @ o @ : ¦ : : M Qc ! Tgyb Qc Tgyb Qfo 12 7 : Tgyb @ : @ @ ¦¦: ¦ ee e % ee e : e ¦ : o %% : e eo : : : @ F M 49 Tlm 8 Qa Cenozoic @ ee e : : : : : HOPE BUTTE FAULT e e : : ¦ @ e e ee ee o : @ @ : e e o e : : o : @ : @ e e : e e e : : : @ @ oo o : o % : o o ¦ : @ o : @ @ : : :% : o : : : : : @ : @ : e : @ : o oo %oo: oo : oo o o o: o ¦ ¦ : : oo o: ¦ ¦ %o %: : Tgyb Qc Tgyb o S : o o o : # Qfi Tbm o : : Tgyb Tbc Qc Tgyb 110210 Contact Solid where certain and location accurate, long-dashed where approximate, short-dashed where inferred, dotted where concealed. Tbc Tgyb Qfi Tbc Qls Qlf1 Tbc Tgyb 44 Tlm : o : ! Tgyb # Qc 75 Tbc Tbc Qfi C' Tgyb Tgyb Qls Qfo @ : ¦ : : % o: o 45 Qc Tgyb Tid Qfi Tav 5 Tgyb Tgyb Tgyb 110211 Tgyb Tbc Qfi Tgyb Tgyb Tbc 15 19 : Tlm Tav 28 Qf Qa Qc Tbc Tds Tav Tav Tbc @ : oo o 9128 37 Qls o Tav @ Tid 11029 !6 Qls Tav Tbc Tav 34 @ A' 3931 Qfo Qfi Tbc 65 Tbc Young inactive fan alluvium (late Holocene) Qlf @ 4 : Tbc Tgyb 70 35 Tav Thb Qfy1 Qfi ! Qls Tbc Qlf Tbc 42 Tbc Tbc 80 Tbc 11028 Tgyb @ Qfi Tbc 20 Qfy1 @ Tbc ! Qf 49 40 13 76 30 : 11 16 @ %: 30 Tbc Tbc Tbc 13 Ü Tav Tbc Tbc Qfy1 11 30 27 Tbc Qfi Qlf Qfy1 Qfi Tav Qc Tgyb @ @ Tds : ª! 31 42 31 34 Tgyb o% Qfy1 TG-3 11027 Tbc Tav % : Tbc Qc Tbc Trcm Qls ª Tbc Tav Qfi Tds Qfy1 12 Tbc 32 Tbc Ü$ & Ql & 52 Tbc @ @ Qc Qfi Tbc 54 NHS-9 @ : Trcm 71 Tbc Qfy Thb 9 17 Qfy1 Qfi 6 Qfy1 Thb Thb Qc Tbc ª Qls 19 Thb Qfy1 o $ Tbc Tav Qls Qls Thb Qfy1 30 Qlf Tid 46 o o Qa Qfy1 Qfy : ª NHS-13 Qfi Qc Tbc Qfy1 Qf TG-2 10 9 14 Qlf Tbc Qfi # 22 Qfy 80 Qc Qf @ Qfy o @ Qc Tav Qlf1 Ql Qfy Tid Tbc Qa Qc 72 : @ Tbc @ ¦ & ! Tbc Tds Tav Qls 9 Tbc o @ @ Qfi 80 Tbc Tav ª ª ª@ ª 14 Qls 12 51 75 Qfi TG-19 Qc Qfy1 Qx Qst Rocks of Oregon-Idaho Graben Qa Qfi Qfy : Qfy1 Tav Qc 10 20 9 7272 Qf 23 16 Tid 16 32 Thb QTg TG-20 Young active fan alluvium and recently abandoned active alluvial surfaces (Holocene) @ 16 8 Tbc Tbc Qfy : @ @ Tbc 9 20 @ 3 56 61 22 Qlf1 Tid Qfy MIOCENE ROCKS Qc Tsd @ Tbc Qfy1 Tds TG-16 Qfy TG-16b 6 14 Tbc 71 Qst NHS-8 TG-21 Qfi : : ªª Tid Qc Qfy Qfy Qa 15Tid Qc Qfy1 @ Tbc Tbc Qfy1 Tds 7 2 Tid Tbc 22 27 15 Qst Qst 16 11 48 :% Qfi @ Tbsc 25 18 13 51 Tbc 19 Tbc 6 Tbc Qc Tav Tav Qls Qss Qfy Tid Qlf QTg Young alluvium, undivided (Holocene to late Pleistocene) Tid 71 Qfo 11 @ 27 62 3 11 9 o Tds Tds Qfo Qx Tbc Tbc 65 Qss NHS-2 Qx Qfo 21 Tav Tav Qc 19 Tav 11 12 Thb Qa Tid Thcs @ Qfo Qfi 51 27 Tds 7 9 Qfy Qc Qc Qfy Tsd Qc Qfy 26 @ 8 15 Qc e Thb 10045 20 16 Tbc Tbc ! Tbc 7 Tds Tbc ª ª NHS-1 Qfo o 8 Qfy : Qfo Tds Qa o 4 Qfi Qc Tav ª 3 Tbc Qfy oo o% 16 o 5 Qfi o o o oo oo oo oo : o o: 80 5 Tbc 14 o ª Qst Qfo 77 Qls Qc Qc Qls Qc Qfi #! 7274 Qc Qfi NHS-5 22 Qfy1 ov oo oo 31 28 32 Qfi Tid Tid Tid QThbr Tid 7 9 14 8 Tid 24 56 Tid 16 Tbc 18 Qa Tbc B' Tid Qc Tid Qfy1 Thb 49 QThbr CO T CR TONW Qfy EE K F OOD AU LT Tbc Qfo TG-18 2 7 Qfy Tbc Tbc Thb Thb 9 Qfy1 Tds o o o oo Qfo Tbc Qfy Tbc Thb Tbc 6 Qc 22 Qfi Tbc Qfi Tbc Qfy1 Qf Qfi Qfo o o oo o ooo 11 Thb 73 Tbc o Thb Tbc Qfi Qfy1 Thcs2 Qfo 24 Qfy : o oo Thb Tbc : ª NHS-4 ªª Qfi Tid Qfy1 Qfo 21 Thb ¦ o 10 Tbc Qc Qc 30 Thcs2 Tds Qf NHS-10 TG-5 NHS-11 Tbc Tsd TG-8 Tds 32 NHS-3 Qa Tbc Tbn Qc 5 Qc 16 o o o o Tsd NHS-12 ª Thb Landslide (Holocene to Pleistocene) Rocks of Western Snake River Plain Qfy1 oo oo ª Thcs2 Qls 78 Qf o oo S Qa Tbc # Tsd Qfi ªª TG-6 Tsd : Tds 25 o o : Tbc Tbc Qfy1 : oo Qa Tsd : 15 Qa Qfy1 Qfi Qa : Thb Qf ª Tds Colluvium (late Holocene to Pleistocene) Qfo Qfy1 Qls : @ Qfi ! ª : Qc Tid Qc : 5 Thb T FAUL 10065 Tbn Tsd #52 9 QTss Thcg ª Qc TG-12 Tid 42 Thb Qc Tid TG-7 Qc NEAL 9 Tbn 25 Thcs2 25 27 Qfi Qc Tid Qa Qfy1 @ Thcs Tid 21 ¦: : o : Qfy1 Thcs o Qc : Tbc Tbn @ Qfi Qc 75 # ! Qa Qfo Thb Thcs2 Qc QTg 2 Trcm @ @ 41 Tds 13 16 11 ª 35 40 Trcm Tds 19 Qc Qa Tid Thb o TG-14 11026 Qfi Qfy1 Trcm 23 74 Tbc Tid @ Qfy1 Thcs2 Thcs Thcs Thb Qfi Qc : Thcg 33 Thcs2 Qf 9 @ Qc Trcm Thb 25 Qc @ ooo Tid 22 Trcm S : : Thb Qa 20 Qa Thb 56 Qfi 18 33 31 Trcm Trcm Thb 7 Tid 4 @ Qfi Trcm Tds Qfy1 11 Tid Qc Qfi Tid : Tid 8 Qa 13 Qa Tid Tid Symbology (per FGDC-STD-013-2006) QUATERNARY AND TERTIARY ROCKS : o : : : o : o % o %% & : : oo : o o o o : : : : : o o o : ¦: : : ¦ o : : % : : ¦ oo ¦ : o : : : o o o ¦ o Ü o ¦o ¦ oo o oo : o : : o : : oo o : : o : o % : : oo o o 8 : Qc Qc Qfi 68 5 Thb Tds 34 AULT TTE F 12 1827 8 Qc Thcs Thcg Tds 35 17 Thb F BU Qfi Tid 4 Tid 79 : Qfi Qfo Trbr 60 RLOA 24 23 2 5 Qc Tid Qa Trcm Qc SUGA : Qfo @ Tbc Qfi @ 34 34 27 Qc Tbc ooo 8 24 Tbc 29 Tbc Tbc 14 52 Tbc 45 9 Tbc 51 Qa Qfy1 12 23 Thcs2 o & Thcg Qfo Thcs2 Qfo 13 Thcs Qa 24 Trcm 11 Qc Tbc @ 15 16 59 7 Thcs Thcs 33 Thcs Tbc 30 Thb @ Tbc Trcm C Qfi Tid @ Tds 80 Tid Tbc Qfi 20 Qc 28 Tbc 6 11 19 Thcs2 Qf @ 26 Tbc Thb Qfo Qfi Tbc 12 6 31 Trcm 76 9 Qc o Qc Tbc 19 9 Tbc Thcs2 Tbc 14 35 Qc Thcs1 61 : Thb ¦ : Thcs2 26 Qc Tbc 5 8 Qfo 15 25 Qc Thb Tid Tbc 5 Qfi 15 Tds 5 7 Qfo 11 77 Tbc 9 Tbc 8Tbc Thb Qfo 6 Qc Trcm Qf Qc Tds 19 11 Qc Qa Trcm Tbc Qfi Qa Tid Qc Thcg @ o Tbc Qfi 36 Thcs Qfo o 23 16 Qa 15 ¦¦ ¦ % 54 14 23 3 5 Tbc Tbc18 o 60 Tbc 9 Tbc Qf 23 o B o Thb Tbc :% : %Ü o : oooo o oo o :o :% % : o o oo :e o o o e o ooo o o : : 8 o o o 4 6 4 14 Tbc Qfo Qfi Qa Thb @ Trcm Trcm Qc 15 : o Trcm 18 Qc Tbc 21 : oo 78 Qc 19 o o Trcm Tbsc o o o Qfy1 ¦ 10 @ Qc 16 Thb Thcs 6 oo @ o @ 3 32 Tbm Thcs Qfy1 Thb 43 Qfi 69 75 : :% o o o ¦ @ @ Thb Thcg Thcg o o @ o : o 7 oo 80 Qfo Qc 24 24 Thcs 9142 Thcg ! Trcm Tbm10 Thb 25 Trcm ¦ @ : o Qc ! 9143 Thcs Thcg : Tbc Qc Thb : Bully Creek Resevoir shoreline deposits (latest Holocene) Alluvial Deposits Thcs @ Qa 35 36 Qfi 19 Qfo Trbr Tds 46 46 Qc Tbc Qfo 56 Thcg 3 63 11 ÜÜ 17 QTss 3 Thcg o : 16 Qfy 42 44 Qc Qfo Qls Thcg Thcs Qc o 5 15 Tbcg Qfi 2 6 Qfo 48 Thcg QTss : : : oo o Qfo : o 23 o o @ Qa Qfo Qfo ¦oo o o o o @ Tbc Qa 8 Qa Trcm 14 24 Qa o : Tbc Qfo Qlf1 Hillslope and Mass-Wasting Deposits oo : @ Thcs Tbc Bully Creek Resevoir flood deposits (latest Holocene) : Thcg : o oo ¦¦ Thb Tds Qfo Tbc Qf ooo : : Qfy 21 ¦ Tds QTss 15 Qa 25 23 Qa Tbc o o Qa Qc 21 @ @ 79 Qfo Qa Qfo 11 : Qlf K Qfy1 Trcm Trcm Tbc Qc Tds Trcm Thb Tbc 70 F Qc % : S Qc Trcm Qfi @ o Tbc 20 Qfy Qc Qfy1 Qc Qa Thb Trcm Tds 11 Qa 12 Qc Qfo : 20 Trcm Tbc 58 Tds Bully Creek Resevoir Deposits $ o Qf Tds o oo o 80 o 48 Qfo 5 Qfo : Trcm Thb Qf @ Tds : A Thb o o o Thb : Thb Disturbed and modified areas Qx @ Thb Thb Thb Qc Qf Tds Tlm Tds Thb Thcs2 Thcs Thb Thcs Thb Thcs Tav Tbc Tav Tds Tds Thb Thcs2 Thcs1 Thb Tbm Qa Thb Thcs2 Trcm Thcs1 Thb Thcs Tbm Tbc Tav Tds Thb Qa 5,000 Scale 1:24,000 0 4,000 Qf Qfi Qf 3,000 Qf Tbc Tav 2,000 Tds Thb 1,000 Trcm? Tbm S 0 ×× Adjoining 7.5' quadrangle names ^ GN 0º 07' MN 17º 30' UTM GRID AND 1983 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Brady Creek Brogan Jamieson McCarthy Ridge Buckbush Creek Swede Flat Hope Butte Willowcreek 9 Westfall 10 Little Valley 11 Vines Hill 12 Vale West 13 Namorf 14 Harper 15 Kane Spring Gulch 16 Double Mountain 0.5 0 Map location 0 1 kilometer 0.5 1000 2000 3000 1 4000 5000 mile feet CONTOUR INTERVAL 20 FEET Projection: Universal Transverse Mercator, Zone 11, North American Datum 1927 (m) OREGON Base map: U.S. Geological Survey Swede Flat 7.5' quadrangle (1990) U.S. Geological Survey Hope Butte 7.5' quadrangle (1990) U.S. Geological Survey Little Valley 7.5' quadrangle (1990) U.S. Geological Survey Vines Hill 7.5' quadrangle (1990) Field work done in May 2011-June 2012 Supported by the U.S. Department of Energy (DE-EE0002748) DRAFT Preliminary geologic map Has not undergone office or field review Will be revised before publication Edited by XXXXXXXXXXXXXXXXX Compilation by Joel H. Edwards Cartography and map production in ESRI ArcGIS v10.1 (ArcGeology v1.3) by Joel H. Edwards and Matthew Richardson First Edition, March 2013 Printed by Nevada Bureau of Mines and Geology This map was printed on an electronic plotter directly from digital files. Dimensional calibration may vary between electronic plotters and X and Y directions on the same plotter, and paper may change size; therefore, scale and proportions may not be exact on copies of this map. For sale by: Nevada Bureau of Mines and Geology 2175 Raggio Pkwy. Reno, Nevada 89512 ph. (775) 682-8766 www.nbmg.unr.edu; nbmg@unr.edu ####
