Nevada Bureau of Mines and Geology (NBMG) Petroleum Data Map of Nevada, Map 162 by Larry J. Garside and Ronald H. Hess 2007 This zip compressed file contains the data used to produce the Petroleum Data Map of Nevada, NBMG Map 162. In addition to the data sets used to produce map 162 this file also contains a copy of the completed map in PDF file format, a base map of Nevada in tiff format, and some of the original data sets that were used to develop Map 162. These digital datasets are in shapefile format. All digital coverages are in UTM, zone 11, meters, NAD 27 projection. A full description of how the data sets were used to produce this map is given in the collar and legend information contained on the PDF of Map 162 located in this file. This information should be considered preliminary. It has not been edited or checked for completeness or accuracy. Directory structure: Readme.doc This readme file. Readme.txt This readme file. Map_162.pdf Final version of the Petroleum Data Map of Nevada in a layered Acrobat PDF file format. Map_162_Data_Sets\ Directory contains data sets used to construct the final map (includes metadata files). Map_162_Data_Sets\CAI_Max_Map.shp Conodont Color Alteration Indices (CAI) data set. Map_162_Data_Sets\nev_base.tif Georeferenced tifw 1:1,000,000 scale base map of Nevada Map_162_Data_Sets\Oil_map162.shp Nevada Oil and Gas well data base. Map_162_Data_Sets\Seeps_Shows.shp Locations of oil and gas seeps and shallow shows. Map_162_Data_Sets\Source_Rocks.shp Geologic units associated with possible petroleum source rocks. Original_data_sets\ Directory containing assorted data sets used to build the data layers that Map 162 is developed from. Documentation for these data sets are contained within each directory as metadata and/or in report format. Complete references for the source of the various data sets that were used and are contained in this directory can be found on the map. Data from: Hess, R.H., 2004, Nevada Oil and Gas Well Database (NVOILWEL), Nevada Bureau of Mines and Geology, Open-File Report 04-1, 242 p. [http://www.nbmg.unr.edu/lists/oil/oil.htm;] - Original_data_sets\Hess2004_OilWells\of041.pdf Nevada Oil and Gas Well Database in PDF format. - Original_data_sets\Hess2004_OilWells\README.TXT Nevada Oil and Gas Well key text file - Original_data_sets\Hess2004_OilWells\of041.dbf Nevada Oil and Gas Well Database Data from: Garside, L.J., Hess, R.H., Fleming, K.L., and Weimer, B.S., 1988, Oil and gas developments in Nevada: Nevada Bureau of Mines and Geology Bulletin 104, 136 p. - Original_data_sets\Bull_104\index.html Index page to Oil and Gas Developments in Nevada Data from: Crafford, A.E.J., 2007, Geologic map of Nevada: U.S. Geological Survey Data Series DS-249, scale 1:250,000. - Original_data_sets\Crafford2007\Crafford2007_F.shp Fault coverage - Original_data_sets\Crafford2007\Crafford2007_G.shp Geology coverage - Original_data_sets\Crafford2007\Explanatory Notes for Nevada State Digital Geologic Map.pdf Explanatory Notes - Original_data_sets\Crafford2007\NevadaDigitalGeologicMapLegend.pdf Legend image Data from: Harris, A.G., and Crafford, A.E.J., 2007, A conodont database of Nevada, in Crafford, A.E.J., Geologic map of Nevada: U.S. Geological Survey Data Series DS-249, scale 1:250,000. - Original_data_sets\Harris2007\Harris2007_Conodonts.shp Conodont database - Original_data_sets\Harris2007\Explanatory Notes for Nevada State Digital Geologic Map.pdf Explanatory Notes - Original_data_sets\Harris2007\Biostratigraphic age codes.pdf Age codes For questions about these files contact: Ron Hess Nevada Bureau of Mines and Geology University of Nevada, Reno, M.S. 178 Reno, Nevada 89557-0088 Email: rhess@unr.edu Phone: 775-784-6692 Web: http://unr.edu/homepage/rhess/ 10/25/2007 ========== Report text - also contained on Map_162.pdf ========= Petroleum Data Map of Nevada Larry J. Garside and Ronald H. Hess Nevada Bureau of Mines and Geology Map 162 2007 Scale 1:1,000,000 PETROLEUM DATA MAP OF NEVADA Oil and Gas Well Data Current and past oil production wells, petroleum exploration wells with shows of oil and/or gas, and petroleum exploration wells with no shows or no data (from Hess, 2004), updated through 2006, are plotted on the map. Seeps The term "seep" is used to refer to shows of oil, gas, or solid bitumen at the surface, in springs, and in non-petroleum wells. Data are from Garside and others (1988), and Barker (1996), Hulen and others (1994, 1999), and Schalla and others (1994). Source Rocks A number of stratigraphic units in Nevada have been mentioned as potential source rocks for petroleum. We list below, by age, these formations, the map unit descriptors of Crafford (2007) for the map units that represent or include the potential source rocks, and select references that mention or discuss source-rock potential of the referenced units. Some of the units of Crafford (2007) are more inclusive than the formations listed below. The outcrops of these units (from Crafford, 2007) are shown collectively on the map. Miocene(?) -- lower Humboldt Formation of Frerichs and Pekarek (1994) [outcrops in the Windermere Hills northeast of Wells]. Ts1 as shown by Coats (1987). Reference: Frerichs and Pekarek, 1994. Eocene/Oligocene(?) - Elko Formation - Ts1. References: Poole and others, 1983; . Poole and Claypool, 1984; Palmer, 1984. Paleocene/Eocene/Cretaceous(?) - Sheep Pass Formation - Ts1. References: Poole and others, 1983; Poole and Claypool, 1984. Late Cretaceous/Early Tertiary - Pansy Lee Formation - TKcg (Humboldt County only). Reference: Wilden, 1979. Cretaceous - Newark Canyon Formation - Kcg (in Eureka, White Pine, Elko, and Nye Counties. Reference: Poole and others, 1983. Cretaceous - King Lear Formation - Kcg (Humboldt County only). Reference: Willden, 1979. Triassic - Favret Formation (part of the Star Peak Group) - TRc. Reference: Cook, 1987. Permian - Phosphoria Formation [Park City Group] - Pc (Carbonaceous shale members in eastern Elko County as shown by Maughan, 1984, fig. 2). References: Maughan, 1984; Poole and Claypool, 1984, p. 196; Wardlaw and others, 1979. Pennsylvanian/Permian - Bird Springs Formation - PlPc (Clark County only). Reference: Longwell and others, 1965, p. 160. Mississippian - Chainman Shale, Webb Formation, Woodruff Formation - lPMcl, MDcl, MDst. References: Poole and others, 1983; Poole and Claypool, 1984. Devonian/Mississippian - Pilot Shale - PlPc, MDcl, some MDst. Reference: Poole and Claypool, 1984, p. 196. Ordovician - Vinini Formation (?) - DOts. References: Poole and others, 1983; Poole and Claypool, 1984. Conodont Color Alteration Indices (CAI) Conodonts are the apatitic hard parts (teeth) of an extinct group of marine worm-like animals. They range in age from Cambrian to Triassic and are excellent biostratigraphic zone indicators. They contain trace amounts of organic matter that change color with increasing temperature. Conodont color alteration indices (CAI), reported in increments of 0.5, are a measure of organic and mineral metamorphism (Epstein and others, 1977). Thus, these indices are useful in interpreting the heating history of petroleum source rocks. Because thermal history is a key factor in hydrocarbon generation and preservation, CAIs (in combination with source-rock organic content) can be useful in evaluating petroleum potential. Harris and Crafford (2007) reported maximum and minimum CAI values for collections of Nevada conodonts. Most collections did not exhibit a range, and the maximum and minimum values were the same. However, some samples exhibited a range of 0.5 to 4 or more. We plotted the maximum values reported by Harris and Crafford (2007). We suggest that if any of the conodonts were heated to a higher level in the host rock, then any associated hydrocarbons would have also reached those temperatures (e.g., Repetski and others, 2005). In general, CAI > 4.5 is considered to be the thermal cutoff for most hydrocarbon production (Harris and others, 1980). We report the CAI maximum values in the following ranges: 1.0 & 1.5; 2.0 & 2.5; 3.0 & 3.5; 4.0 & 4.5; and >4.5 Also, we represent the ages of the conodonts (and thus the rocks sampled) using the AgeMin numerical column in Harris and Crafford (2007): <3099 - Triassic 3100 - 3299 - Pennsylvanian-Permian 3300 - 3499 - Mississippian-Devonian >3500 - pre Devonian REFERENCES Barker, C.E., 1996, Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California -- geochemical analysis and thermochronologic modeling to evaluate conceptual petroleum plays: U.S. Geological Survey Open-File Report 96-051, 51 p. Coats, R.R., 1987, Geology of Elko County, Nevada: Nevada Bureau of Mines and Geology Bulletin 101, 112 p. Cook, H.E., 1987, National Petroleum Assessment, western Basin and Range province: U.S. Geological Survey Open-File Report 87-450-L. Crafford, A.E.J., 2007, Geologic map of Nevada: U.S. Geological Survey Data Series DS-249, scale 1:250,000. Epstein, A.G., Epstein, J.B., and Harris, L.D., 1977, Conodont color alteration -- an index to organic metamorphism: U.S. Geological Survey Professional Paper 995, 27 p. Frerichs, W.E., and Pekarek, A.H., 1994, Lower Miocene petroleum potential of northeast Elko County, Nevada, in Schalla, R.A., and Johnson, E.H., eds., Oil fields of the Great Basin: Nevada Petroleum Society, Reno, p. 151-162. Garside, L.J., Hess, R.H., Fleming, K.L., and Weimer, B.S., 1988, Oil and gas developments in Nevada: Nevada Bureau of Mines and Geology Bulletin 104, 136 p. Harris, A.G., and Crafford, A.E.J., 2007, A conodont database of Nevada, in Crafford, A.E.J., Geologic map of Nevada: U.S. Geological Survey Data Series DS-249, scale 1:250,000. Harris, A.G., Wardlaw, B.R., Rust, C.C., and Merrill, G.K., 1980, Maps for assessing thermal maturity (conodont color alteration index maps) in Ordovician through Triassic rocks in Nevada and Utah and adjacent parts of Idaho and California: U.S. Geological Survey Miscellaneous Investigation Series Map I-1249. Hess, R.H., 2004, Nevada Oil and Gas Well Database (NVOILWEL), Nevada Bureau of Mines and Geology, Open-File Report 04-1, 242 p. [http://www.nbmg.unr.edu/lists/oil/oil.htm;] with well information updated through 2006 for this map. Hulen, J.B., Pinnel, M.L., Nielson, D.L., Cox, J.W., and Blake, J., 1994, The Yankee gold mine occurrence, Alligator Ridge District, Nevada -- An exhumed and oxidized, paleogeothermal reservoir, in Schalla, R.A., and Johnson, E.H., eds., Oil fields of the Great Basin: Nevada Petroleum Society, Reno, p. 131-142. Hulen, J.B., Collister, J.W., Johnson, S.D., and Allis, R., 1999, Oils in the Dixie Valley and Kyle Hot Springs geothermal systems, Nevada -- potentially sensitive indicators of natural and induced reservoir processes: Proceedings, Twenty-fourth Workshop on Geothermal Reservoir Engineering, Stanford University, January 25-27, 1999, 15 p. [SGP-TR-162]. Longwell, C.R., Pampeyan, E.H., Bowyer, B., and Roberts, R.J., 1965, Geology and mineral deposits of Clark County, Nevada: Nevada Bureau of Mines and Geology, Bulletin 62, 218 p. Maughan, E.K., 1984, Geological setting and some geochemistry of petroleum source rocks in the Permian Phosphoria Formation, in Woodward, J., Meissner, F.F., and Clayton, J.L., eds., Hydrocarbon Source Rocks of the Greater Rocky Mountain Region, Rocky Mountain Association of Geologists, Denver, Colorado, p. 281-294. Palmer, S.E., 1984, Hydrocarbon source potential of organic facies of the lacustrine Elko Formation (Eocene/Oligocene), northeast Nevada, in Woodward, J., Meissner, F.F., and Clayton, J.L., eds., Hydrocarbon Source Rocks of the Greater Rocky Mountain Region, Rocky Mountain Association of Geologist, Denver, Colorado, p. 497-511. Poole, F.G. and Claypool, G.E., 1984, Petroleum source-rock potential and crude-oil correlation in the Great Basin, in J. Woodward, F.F. Meissner, and J.L. Clayton, eds., Hydrocarbon source rocks of the Greater Rocky Mountain region: Rocky Mountain Association of Geologists, Denver, p. 179-229. Poole, F.G., Claypool, G.E., and Fouch, T.D., 1983, Major episodes of petroleum generation in part of the northern Great Basin: Geothermal Resources Council Special Report 13, p. 207-213. Repetski, J.E., Ryder, R.T., Avary, K.L., and Trippili, M.H., 2005, Thermal maturity patterns (CAI and %Ro) in the Ordovician and Devonian rocks of the Appalachian basin in West Virginia: U.S. Geological Survey Open-File Report 2005-1078, 69 p. Schalla, R.A., Barker, C.E., and Neumann, W.H., 1994, Hot water and oil from a shallow exploratory borehole, Buena Vista Valley, Pershing County, Nevada, in Schalla, R.A., and Johnson, E.H., eds., Oil fields of the Great Basin: Nevada Petroleum Society, Reno, p. 127-130. Wardlaw, B.R., Collinson, J.W., and Ketner, K. B., 1979, Regional relations of middle Permian rocks in Idaho, Nevada, and Utah, in Newman, G.W., and Goode, H.E., eds., Basin and Range Symposium: Rocky Mountain Association of Geologists and Utah Geological Association, p. 277-283. Willden, Ronald, 1979, Petroleum exploration possibilities in northwestern Nevada, in Newman, G.W., and Goode, H.E., eds., Basin and Range Symposium: Rocky Mountain Association of Geologists and Utah Geological Association, p. 541-548. ==================