Jeff L Doebrich (Former Employee)
Science and Products
Filter Total Items: 27
The Ar Rayn Terrane: Geotectonic implications of unique metallogeny in the Arabian Shield The Ar Rayn Terrane: Geotectonic implications of unique metallogeny in the Arabian Shield
No abstract available.
Authors
J. L. Doebrich, T. Hayes, A.A. Siddiqui, Y. Saleh, P.R. Johnson, F.H. Kattan, C.H. Mackay, B. Shaikan, M. Basahal, H. Zahran
Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California; geology and its relation to resource genesis Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California; geology and its relation to resource genesis
The U.S. Geological Survey (USGS) is a party to joint interagency Memorandum of Understandings (MOUs) with the Bureau of Land Management (BLM) and the U.S. Bureau of Mines (USBM) to coordinate resource assessments and evaluations of BLM administered lands. Resource assessments of BLM Resource Areas, that are conducted by the USGS under these MOUs, assist the BLM in meeting inventory and...
Authors
J. L. Doebrich
Metallic mineral resources in the U.S. Bureau of Land Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California Metallic mineral resources in the U.S. Bureau of Land Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California
No abstract available.
Authors
S. Peters, J. T. Nash, D. A. John, G.T. Spanski, H. King, K.A. Connors, B. Moring, J. L. Doebrich, D.J. McGuire, George Albino, V.C. Dunn, T. Theodore, S. Ludington
Characterization of mineral deposits in rocks of the Triassic to Jurassic magmatic arc of western Nevada and eastern California Characterization of mineral deposits in rocks of the Triassic to Jurassic magmatic arc of western Nevada and eastern California
No abstract available.
Authors
J. L. Doebrich, L. J. Garside, D. Shawe
Preliminary geologic map of the Galena Canyon Quadrangle, Lander County, Nevada Preliminary geologic map of the Galena Canyon Quadrangle, Lander County, Nevada
No abstract available.
Authors
J. L. Doebrich
Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California
No abstract available.
Authors
Jeff Doebrich, George Albino, C.E. Barker, W. Duffield, V.C. Dunn, W. Hanna, J.P. McFarlan, D.J. McGuire, M. Miller, S. Peters, Donald Plouff, G. Raines, D.L. Sawatasky, G.T. Spanski
Metallogenic evolution of mineral de posits in Triassic to Jurassic magmatic arc rocks in and near the northern Walker Lane, western Nevada and eastern California Metallogenic evolution of mineral de posits in Triassic to Jurassic magmatic arc rocks in and near the northern Walker Lane, western Nevada and eastern California
No abstract available
Authors
J. L. Doebrich, L. J. Garside, D. Shawe
Preliminary geological map of the Antler Peak 7.5 minute quadrangle, Lander County, Nevada Preliminary geological map of the Antler Peak 7.5 minute quadrangle, Lander County, Nevada
No abstract available.
Authors
J. L. Doebrich
Geology of the Ishmas gold district, Kingdom of Saudi Arabia Geology of the Ishmas gold district, Kingdom of Saudi Arabia
The Ishmas gold district was mapped at 1:25,000 scale to place auriferous mineralization into geologic perspective, to assist in creating an ore-deposit model, and to aid in devising a strategy for subsequent exploration elsewhere in the Jabal Ishmas-Wadi Tathlith gold belt. The precratonic evolution of the district began with the deposition of a tholeiitic mafic volcanic and...
Authors
Jeff Doebrich, Willis White
Geology of the Ar Rahail ancient gold mine, Kingdom of Saudi Arabia Geology of the Ar Rahail ancient gold mine, Kingdom of Saudi Arabia
The Ar Rahail ancient gold mine is a collection of ancient workings in metasedimentary rocks of the Murdama Group adjacent to, and above the flanks of the Rahail stock. Injection of mafic dikes of regional origin was followed by emplacement of the Rahail stock, which consisted of early dikes of porphyritic biotite-bearing hornblende granodiorite, and a later cupola of porphyritic...
Authors
Willis H. White, Rashid Samater, Jeff Doebrich
Rock geochemistry in the Mahd adh Dhahab district, Kingdom of Saudi Arabia Rock geochemistry in the Mahd adh Dhahab district, Kingdom of Saudi Arabia
Ten sets of geochemical samples from country rock, altered country rock, and quartz veins were collected to determine metal abundances and distributions in the Mahd adh Dhahab district. Gold, silver, copper, lead, and zinc are present throughout the district in veins and altered country rock. Although four generations of quartz veins are defined, there is complete gradation between types...
Authors
R. Worl, J. L. Doebrich, M. Allen, A.M. Afifi, R.J. Ebens
Geology of the Wadi Ash Shu'bah Quadrangle, Sheet 26 E, Kingdom of Saudi Arabia Geology of the Wadi Ash Shu'bah Quadrangle, Sheet 26 E, Kingdom of Saudi Arabia
The Wadi Ash Shu'bah quadrangle, located in the north-central part of the Arabian Shield, is underlain by nine Precambrian volcano-sedimentary formations and a wide compositional range of Precambrian intrusive rocks. Late Proterozoic to early Paleozoic rocks of the Jibalah Group crop out in the southwestern part of the quadrangle. Paleozoic and younger units are limited to the early...
Authors
James Quick, Jeff Doebrich
Non-USGS Publications**
Doebrich, J.L., and Theodore, T.G., 1996, Geologic history of the Battle Mountain Mining District, and regional controls on the distribution of mineral systems, in Coyner, A.R., and Fahey, P.L., eds., Geology and ore deposits of the American Cordillera: Geological Society of Nevada Symposium Proceedings, Reno/Sparks, Nevada, April 1995, p. 453-483.
Doebrich, J.L., 1995, Geology and mineral deposits of the Antler Peak 7.5-minute quadrangle, Battle Mountain, Lander County, Nevada: Nevada Bureau of Mines and Geology Bulletin, 44 p., 2 plates.
Doebrich, J.L., 1984, Geology and hydrothermal alteration at the Mahd adh Dhahab precious-metal deposit, Kingdom of Saudi Arabia: MSc thesis, Colorado School of Mines, 148 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 27
The Ar Rayn Terrane: Geotectonic implications of unique metallogeny in the Arabian Shield The Ar Rayn Terrane: Geotectonic implications of unique metallogeny in the Arabian Shield
No abstract available.
Authors
J. L. Doebrich, T. Hayes, A.A. Siddiqui, Y. Saleh, P.R. Johnson, F.H. Kattan, C.H. Mackay, B. Shaikan, M. Basahal, H. Zahran
Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California; geology and its relation to resource genesis Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California; geology and its relation to resource genesis
The U.S. Geological Survey (USGS) is a party to joint interagency Memorandum of Understandings (MOUs) with the Bureau of Land Management (BLM) and the U.S. Bureau of Mines (USBM) to coordinate resource assessments and evaluations of BLM administered lands. Resource assessments of BLM Resource Areas, that are conducted by the USGS under these MOUs, assist the BLM in meeting inventory and...
Authors
J. L. Doebrich
Metallic mineral resources in the U.S. Bureau of Land Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California Metallic mineral resources in the U.S. Bureau of Land Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California
No abstract available.
Authors
S. Peters, J. T. Nash, D. A. John, G.T. Spanski, H. King, K.A. Connors, B. Moring, J. L. Doebrich, D.J. McGuire, George Albino, V.C. Dunn, T. Theodore, S. Ludington
Characterization of mineral deposits in rocks of the Triassic to Jurassic magmatic arc of western Nevada and eastern California Characterization of mineral deposits in rocks of the Triassic to Jurassic magmatic arc of western Nevada and eastern California
No abstract available.
Authors
J. L. Doebrich, L. J. Garside, D. Shawe
Preliminary geologic map of the Galena Canyon Quadrangle, Lander County, Nevada Preliminary geologic map of the Galena Canyon Quadrangle, Lander County, Nevada
No abstract available.
Authors
J. L. Doebrich
Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California
No abstract available.
Authors
Jeff Doebrich, George Albino, C.E. Barker, W. Duffield, V.C. Dunn, W. Hanna, J.P. McFarlan, D.J. McGuire, M. Miller, S. Peters, Donald Plouff, G. Raines, D.L. Sawatasky, G.T. Spanski
Metallogenic evolution of mineral de posits in Triassic to Jurassic magmatic arc rocks in and near the northern Walker Lane, western Nevada and eastern California Metallogenic evolution of mineral de posits in Triassic to Jurassic magmatic arc rocks in and near the northern Walker Lane, western Nevada and eastern California
No abstract available
Authors
J. L. Doebrich, L. J. Garside, D. Shawe
Preliminary geological map of the Antler Peak 7.5 minute quadrangle, Lander County, Nevada Preliminary geological map of the Antler Peak 7.5 minute quadrangle, Lander County, Nevada
No abstract available.
Authors
J. L. Doebrich
Geology of the Ishmas gold district, Kingdom of Saudi Arabia Geology of the Ishmas gold district, Kingdom of Saudi Arabia
The Ishmas gold district was mapped at 1:25,000 scale to place auriferous mineralization into geologic perspective, to assist in creating an ore-deposit model, and to aid in devising a strategy for subsequent exploration elsewhere in the Jabal Ishmas-Wadi Tathlith gold belt. The precratonic evolution of the district began with the deposition of a tholeiitic mafic volcanic and...
Authors
Jeff Doebrich, Willis White
Geology of the Ar Rahail ancient gold mine, Kingdom of Saudi Arabia Geology of the Ar Rahail ancient gold mine, Kingdom of Saudi Arabia
The Ar Rahail ancient gold mine is a collection of ancient workings in metasedimentary rocks of the Murdama Group adjacent to, and above the flanks of the Rahail stock. Injection of mafic dikes of regional origin was followed by emplacement of the Rahail stock, which consisted of early dikes of porphyritic biotite-bearing hornblende granodiorite, and a later cupola of porphyritic...
Authors
Willis H. White, Rashid Samater, Jeff Doebrich
Rock geochemistry in the Mahd adh Dhahab district, Kingdom of Saudi Arabia Rock geochemistry in the Mahd adh Dhahab district, Kingdom of Saudi Arabia
Ten sets of geochemical samples from country rock, altered country rock, and quartz veins were collected to determine metal abundances and distributions in the Mahd adh Dhahab district. Gold, silver, copper, lead, and zinc are present throughout the district in veins and altered country rock. Although four generations of quartz veins are defined, there is complete gradation between types...
Authors
R. Worl, J. L. Doebrich, M. Allen, A.M. Afifi, R.J. Ebens
Geology of the Wadi Ash Shu'bah Quadrangle, Sheet 26 E, Kingdom of Saudi Arabia Geology of the Wadi Ash Shu'bah Quadrangle, Sheet 26 E, Kingdom of Saudi Arabia
The Wadi Ash Shu'bah quadrangle, located in the north-central part of the Arabian Shield, is underlain by nine Precambrian volcano-sedimentary formations and a wide compositional range of Precambrian intrusive rocks. Late Proterozoic to early Paleozoic rocks of the Jibalah Group crop out in the southwestern part of the quadrangle. Paleozoic and younger units are limited to the early...
Authors
James Quick, Jeff Doebrich
Non-USGS Publications**
Doebrich, J.L., and Theodore, T.G., 1996, Geologic history of the Battle Mountain Mining District, and regional controls on the distribution of mineral systems, in Coyner, A.R., and Fahey, P.L., eds., Geology and ore deposits of the American Cordillera: Geological Society of Nevada Symposium Proceedings, Reno/Sparks, Nevada, April 1995, p. 453-483.
Doebrich, J.L., 1995, Geology and mineral deposits of the Antler Peak 7.5-minute quadrangle, Battle Mountain, Lander County, Nevada: Nevada Bureau of Mines and Geology Bulletin, 44 p., 2 plates.
Doebrich, J.L., 1984, Geology and hydrothermal alteration at the Mahd adh Dhahab precious-metal deposit, Kingdom of Saudi Arabia: MSc thesis, Colorado School of Mines, 148 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.