Institution
BHP Billiton
Company•Melbourne, Victoria, Australia•
About: BHP Billiton is a company organization based out in Melbourne, Victoria, Australia. It is known for research contribution in the topics: Bioleaching & Kimberlite. The organization has 634 authors who have published 657 publications receiving 13797 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors compare interpretations of the lithosphere-asthenosphere boundary (LAB) beneath three well studied Archean regions: the Kaapvaal craton, the Slave craton and the Fennoscandian Shield.
385 citations
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TL;DR: A strongly growing microbially-based metal extraction industry, which uses either rapid stirred-tank or slower irrigation technology to recover metals from an increasing range of minerals using a diversity of microbes that grow at a variety of temperatures is reviewed.
335 citations
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TL;DR: In this paper, the authors show that the results of the most widely used geothermometers for garnet peridotites and pyroxenites demonstrate that the methods are not internally consistent and may diverge by over 200°C even in well-equilibrated mantle xenoliths.
Abstract: Mutual relationships among temperatures estimated with the most widely used geothermometers for garnet peridotites and pyroxenites demonstrate that the methods are not internally consistent and may diverge by over 200°C even in well-equilibrated mantle xenoliths. The Taylor (N Jb Min Abh 172:381–408, 1998) two-pyroxene (TA98) and the Nimis and Taylor (Contrib Mineral Petrol 139:541–554, 2000) single-clinopyroxene thermometers are shown to provide the most reliable estimates, as they reproduce the temperatures of experiments in a variety of simple and natural peridotitic systems. Discrepancies between these two thermometers are negligible in applications to a wide variety of natural samples (≤30°C). The Brey and Kohler (J Petrol 31:1353–1378, 1990) Ca-in-Opx thermometer shows good agreement with TA98 in the range 1,000–1,400°C and a positive bias at lower T (up to +90°C, on average, at T
TA98 = 700°C). The popular Brey and Kohler (J Petrol 31:1353–1378, 1990) two-pyroxene thermometer performs well on clinopyroxene with Na contents of ~0.05 atoms per 6-oxygen formula, but shows a systematic positive bias with increasing NaCpx (+150°C at NaCpx = 0.25). Among Fe–Mg exchange thermometers, the Harley (Contrib Mineral Petrol 86:359–373, 1984) orthopyroxene–garnet and the recent Wu and Zhao (J Metamorphic Geol 25:497–505, 2007) olivine–garnet formulations show the highest precision, but systematically diverge (up to ca. 150°C, on average) from TA98 estimates at T far from 1,100°C and at T < 1,200°C, respectively; these systematic errors are also evident by comparison with experimental data for natural peridotite systems. The older O’Neill and Wood (Contrib Mineral Petrol 70:59–70, 1979) version of the olivine–garnet Fe–Mg thermometer and all popular versions of the clinopyroxene–garnet Fe–Mg thermometer show unacceptably low precision, with discrepancies exceeding 200°C when compared to TA98 results for well-equilibrated xenoliths. Empirical correction to the Brey and Kohler (J Petrol 31:1353–1378, 1990) Ca-in-Opx thermometer and recalibration of the orthopyroxene–garnet thermometer, using well-equilibrated mantle xenoliths and TA98 temperatures as calibrants, are provided in this study to ensure consistency with TA98 estimates in the range 700–1,400°C. Observed discrepancies between the new orthopyroxene–garnet thermometer and TA98 for some localities can be interpreted in the light of orthopyroxene–garnet Fe3+ partitioning systematics and suggest localized and lateral variations in mantle redox conditions, in broad agreement with existing oxybarometric data. Kinetic decoupling of Ca–Mg and Fe–Mg exchange equilibria caused by transient heating appears to be common, but not ubiquitous, near the base of the lithosphere.
225 citations
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TL;DR: In this article, four processes for small-scale liquefied natural gas (LNG) production are evaluated, including a single-stage mixed refrigerant (SMR), a two-stage expander nitrogen refrigerant and two open-loop expander processes.
219 citations
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TL;DR: In this article, a method for interpretation of tensor gravity field component data, based on regularized focusing inversion, is proposed. But the method is not suitable for the interpretation of mining data, which is sensitive to local density anomalies.
Abstract: We develop a new method for interpretation of tensor gravity field component data, based on regularized focusing inversion. The focusing inversion makes its possible to reconstruct a sharper image of the geological target than conventional maximum smoothness inversion. This new technique can be efficiently applied for the interpretation of gravity gradiometer data, which are sensitive to local density anomalies. The numerical modeling and inversion results show that the resolution of the gravity method can be improved significantly if we use tensor gravity data for interpretation. We also apply our method for inversion of the gradient gravity data collected by BHP Billiton over the Cannington Ag-Pb-Zn orebody in Queensland, Australia. The comparison with the drilling results demonstrates a remarkable correlation between the density anomaly reconstructed by the gravity gradient data and the true structure of the orebody. This result indicates that the emerging new geophysical technology of the airborne gravity gradient observations can improve significantly the practical effectiveness of the gravity method in mineral exploration.
203 citations
Authors
Showing all 634 results
Name | H-index | Papers | Citations |
---|---|---|---|
Keith Glover | 49 | 225 | 27689 |
Eckart Meiburg | 47 | 232 | 7515 |
Gabriel da Silva | 43 | 177 | 4938 |
Christopher D. White | 34 | 99 | 5571 |
Yongjun Peng | 33 | 141 | 3062 |
John L. Read | 30 | 106 | 3131 |
Michael J. Nicol | 30 | 174 | 3074 |
Benjamin Charles Kneller | 29 | 67 | 2946 |
Kathy Ehrig | 26 | 102 | 1788 |
Michael E. Glinsky | 25 | 96 | 5457 |
Cecilia Demergasso | 24 | 93 | 1938 |
Allan Trench | 20 | 80 | 1281 |
Stavros Kalaitzidis | 19 | 59 | 1744 |
Merab Menabde | 18 | 25 | 1370 |
Francois Blanchette | 17 | 40 | 1095 |