Edward A du Bray (Former Employee)
Science and Products
Filter Total Items: 16
Filter Total Items: 100
Map showing distribution and classification of felsic plutonic rocks in the eastern Arabian Shield, Kingdom of Saudi Arabia Map showing distribution and classification of felsic plutonic rocks in the eastern Arabian Shield, Kingdom of Saudi Arabia
This 1:500,000-scale compilation shows the distribution of felsic plutonic rocks, lithologic types, and associated mineralization in an area between lat 21° and 24°30’ N., long 43°30’ and 46° E. It is part of a shieldwide compilation being done within the framework of Saudi Arabian Deputy Ministry for Mineral Resources projects 2.04 and 3.12.
Authors
E. A. Du Bray
Geochemical evaluation of felsic plutonic rocks in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia Geochemical evaluation of felsic plutonic rocks in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia
In a geochemical evaluation of the eastern and southeastern Arabian Shield, which included collection of 696 rock samples and 694 pan concentrate samples, a province of tin-anomalous granitoid plutons was defined. Pan concentrates collected in and around these plutons were enriched in tin and tungsten relative to the concentrate population. Rock samples of these leucocratic, muscovite...
Authors
E. A. Du Bray, James E. Elliott, D. B. Stoeser
Mineral potential of selected felsic plutons in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia Mineral potential of selected felsic plutons in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia
Sixteen well-defined geochemical anomalies associated with felsic plutons and (or) muscovite-bearing plutons of Proterozoic age have been identified in the eastern and southeastern Arabian Shield. The majority of these plutons are highly evolved, granitophile-element-enriched muscovite-bearing granites that are weakly peraluminous. A followup study of the mineral potential of these...
Authors
Edward A. du Bray
Reconnaissance geochemical survey of the At Taif-Al Bahah region, southern Hijaz, Kingdom of Saudi Arabia Reconnaissance geochemical survey of the At Taif-Al Bahah region, southern Hijaz, Kingdom of Saudi Arabia
Pan concentrates were prepared from 265 wadi sediment samples collected during a geochemical reconnaissance conducted between At Taif and Al Bahah to further assess previously identified tungsten anomalies and to locate additional mineralized rock. The samples were analyzed by semiquantitative spectrographic methods for 30 elements, and tungsten was determined by colorimetry. All...
Authors
E. A. Du Bray, J. L. Doebrich
Geochemical analyses for gold and zinc of 137 stream-sediment samples from the John Muir Wilderness, California Geochemical analyses for gold and zinc of 137 stream-sediment samples from the John Muir Wilderness, California
No abstract available.
Authors
M. F. Diggles, David A. Dellinger, E. A. Du Bray
Science and Products
Filter Total Items: 16
Filter Total Items: 100
Map showing distribution and classification of felsic plutonic rocks in the eastern Arabian Shield, Kingdom of Saudi Arabia Map showing distribution and classification of felsic plutonic rocks in the eastern Arabian Shield, Kingdom of Saudi Arabia
This 1:500,000-scale compilation shows the distribution of felsic plutonic rocks, lithologic types, and associated mineralization in an area between lat 21° and 24°30’ N., long 43°30’ and 46° E. It is part of a shieldwide compilation being done within the framework of Saudi Arabian Deputy Ministry for Mineral Resources projects 2.04 and 3.12.
Authors
E. A. Du Bray
Geochemical evaluation of felsic plutonic rocks in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia Geochemical evaluation of felsic plutonic rocks in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia
In a geochemical evaluation of the eastern and southeastern Arabian Shield, which included collection of 696 rock samples and 694 pan concentrate samples, a province of tin-anomalous granitoid plutons was defined. Pan concentrates collected in and around these plutons were enriched in tin and tungsten relative to the concentrate population. Rock samples of these leucocratic, muscovite...
Authors
E. A. Du Bray, James E. Elliott, D. B. Stoeser
Mineral potential of selected felsic plutons in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia Mineral potential of selected felsic plutons in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia
Sixteen well-defined geochemical anomalies associated with felsic plutons and (or) muscovite-bearing plutons of Proterozoic age have been identified in the eastern and southeastern Arabian Shield. The majority of these plutons are highly evolved, granitophile-element-enriched muscovite-bearing granites that are weakly peraluminous. A followup study of the mineral potential of these...
Authors
Edward A. du Bray
Reconnaissance geochemical survey of the At Taif-Al Bahah region, southern Hijaz, Kingdom of Saudi Arabia Reconnaissance geochemical survey of the At Taif-Al Bahah region, southern Hijaz, Kingdom of Saudi Arabia
Pan concentrates were prepared from 265 wadi sediment samples collected during a geochemical reconnaissance conducted between At Taif and Al Bahah to further assess previously identified tungsten anomalies and to locate additional mineralized rock. The samples were analyzed by semiquantitative spectrographic methods for 30 elements, and tungsten was determined by colorimetry. All...
Authors
E. A. Du Bray, J. L. Doebrich
Geochemical analyses for gold and zinc of 137 stream-sediment samples from the John Muir Wilderness, California Geochemical analyses for gold and zinc of 137 stream-sediment samples from the John Muir Wilderness, California
No abstract available.
Authors
M. F. Diggles, David A. Dellinger, E. A. Du Bray