Edward A du Bray (Former Employee)
Science and Products
Filter Total Items: 16
Filter Total Items: 100
Garnet compositions and their use as indicators of peraluminous granitoid petrogenesis - southeastern Arabian Shield Garnet compositions and their use as indicators of peraluminous granitoid petrogenesis - southeastern Arabian Shield
Garnet, an uncommon accessory mineral in igneous rocks, occurs in seven small peraluminous granitoid plutons in the southeastern Arabian Shield; textural equilibrium between garnet and other host granitoid minerals indicates that the garnets crystallized from their host magmas. Compositions of the garnets form three groups that reflect host-granitoid compositions, which in turn reflect...
Authors
du Bray
Mineral resources of the Weepah Spring Wilderness Study Area, Lincoln and Nye counties, Nevada Mineral resources of the Weepah Spring Wilderness Study Area, Lincoln and Nye counties, Nevada
No abstract available.
Authors
E. A. Du Bray, H. R. Blank, R. L. Turner, D. D. Gese, A.D. Harris
Mineral resources, geology, and geophysics of the Worthington Mountains Wilderness Study Area, Lincoln County, Nevada Mineral resources, geology, and geophysics of the Worthington Mountains Wilderness Study Area, Lincoln County, Nevada
No abstract available.
Authors
Edward A. du Bray, H. R. Blank, Robert H. Wood
Jabal Silsilah tin prospect, Najd region, Kingdom of Saudi Arabia Jabal Silsilah tin prospect, Najd region, Kingdom of Saudi Arabia
A significant Sn deposit at Jabal Silsilah (26°07′N, 42°41′E), a prominent ring complex in the NE Arabian Shield, is associated with greisen in flat-topped cupolas of a highly evolved, zinnwaldite- and topaz-bearing alkali-feldspar granite. This granite is peraluminous, enriched in incompatible trace elements and characterized by a chondrite-normalized REE profile showing a large...
Authors
du Bray
Metallic-mineral assessment of the Jabal Habashi quadrangle, sheet 26F, Kingdom of Saudi Arabia Metallic-mineral assessment of the Jabal Habashi quadrangle, sheet 26F, Kingdom of Saudi Arabia
An interagency report prepared by the U.S. Geological Survey Saudi Arabian Mission for the Ministry of Petroleum and Mineral Resources, Kingdom of Saudi Arabia. The work on which this report was based was performed in accordance with a cooperative agreement between the U.S. Geological Survey and the Ministry of Petroleum and Mineral Resources.
Authors
Donlad H. Richter, Michael S. Allen, E. A. Du Bray, M. Dean Kleinkopf, John S. Pallister
Subsurface structure of the Silsilah ring complex, as deduced from telluric-electric and audio-magnetotelluric investigation, Kingdom of Saudi Arabia Subsurface structure of the Silsilah ring complex, as deduced from telluric-electric and audio-magnetotelluric investigation, Kingdom of Saudi Arabia
No abstract available.
Authors
C.J. Zablocki, E. A. Du Bray, C. L. Long, C. L. Tippens
Science and Products
Filter Total Items: 16
Filter Total Items: 100
Garnet compositions and their use as indicators of peraluminous granitoid petrogenesis - southeastern Arabian Shield Garnet compositions and their use as indicators of peraluminous granitoid petrogenesis - southeastern Arabian Shield
Garnet, an uncommon accessory mineral in igneous rocks, occurs in seven small peraluminous granitoid plutons in the southeastern Arabian Shield; textural equilibrium between garnet and other host granitoid minerals indicates that the garnets crystallized from their host magmas. Compositions of the garnets form three groups that reflect host-granitoid compositions, which in turn reflect...
Authors
du Bray
Mineral resources of the Weepah Spring Wilderness Study Area, Lincoln and Nye counties, Nevada Mineral resources of the Weepah Spring Wilderness Study Area, Lincoln and Nye counties, Nevada
No abstract available.
Authors
E. A. Du Bray, H. R. Blank, R. L. Turner, D. D. Gese, A.D. Harris
Mineral resources, geology, and geophysics of the Worthington Mountains Wilderness Study Area, Lincoln County, Nevada Mineral resources, geology, and geophysics of the Worthington Mountains Wilderness Study Area, Lincoln County, Nevada
No abstract available.
Authors
Edward A. du Bray, H. R. Blank, Robert H. Wood
Jabal Silsilah tin prospect, Najd region, Kingdom of Saudi Arabia Jabal Silsilah tin prospect, Najd region, Kingdom of Saudi Arabia
A significant Sn deposit at Jabal Silsilah (26°07′N, 42°41′E), a prominent ring complex in the NE Arabian Shield, is associated with greisen in flat-topped cupolas of a highly evolved, zinnwaldite- and topaz-bearing alkali-feldspar granite. This granite is peraluminous, enriched in incompatible trace elements and characterized by a chondrite-normalized REE profile showing a large...
Authors
du Bray
Metallic-mineral assessment of the Jabal Habashi quadrangle, sheet 26F, Kingdom of Saudi Arabia Metallic-mineral assessment of the Jabal Habashi quadrangle, sheet 26F, Kingdom of Saudi Arabia
An interagency report prepared by the U.S. Geological Survey Saudi Arabian Mission for the Ministry of Petroleum and Mineral Resources, Kingdom of Saudi Arabia. The work on which this report was based was performed in accordance with a cooperative agreement between the U.S. Geological Survey and the Ministry of Petroleum and Mineral Resources.
Authors
Donlad H. Richter, Michael S. Allen, E. A. Du Bray, M. Dean Kleinkopf, John S. Pallister
Subsurface structure of the Silsilah ring complex, as deduced from telluric-electric and audio-magnetotelluric investigation, Kingdom of Saudi Arabia Subsurface structure of the Silsilah ring complex, as deduced from telluric-electric and audio-magnetotelluric investigation, Kingdom of Saudi Arabia
No abstract available.
Authors
C.J. Zablocki, E. A. Du Bray, C. L. Long, C. L. Tippens