Transport, Concentration, and Deposition of Precious Metals in Layered Gabbros During Continental Rifting
大陆裂谷期间层状辉长岩中贵金属的传输、富集和沉积
基本信息
- 批准号:9206962
- 负责人:
- 金额:$ 4.81万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1992
- 资助国家:美国
- 起止时间:1992-07-01 至 1993-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Recent discoveries of gold and platinum group (PGE) mineralization in Eocene layered gabbros of East Greenland demonstrate that physical and chemical processes associated with the transition from continental to oceanic rifting can concentrate precious metals in the Earth's crust. One of these gabbros, the Kap Edvard Holm Complex, exhibits an unusual combination of features related to stratiform precious metal mineralization. An understanding of these processes requires detailed field, petrologic, isotopic, and chemical analyses, combined with theoretical analysis of the thermodynamic and transport characteristics of magma-hydrothermal systems. The long-term plans for this research program inviove using these techniques to provide new insights into the nature of processes controlling: 1) precious metal concentration during gabbro crystallization; and 2) precious metal transport and deposition in gabbro-hosted hydrothermal systems. A specific objective of the research will be evaluation of various hypotheses that may explain the unusually high ratio of precious metal to sulfide that is characteristic of this deposit. Investigation of the processes responsible for mineralization in the East Greenland gabbros is potentially of great importance to understanding the global distribution of precious metals and to formulating future mineral exploration strategies. The present award will enable him to get started while he is formulating a plan to achieve the long-term goals.
最近在东格陵兰始新世层状辉长岩中发现的金和铂族(PGE)矿化表明,与大陆裂陷向海洋裂陷过渡相关的物理和化学过程可以富集地壳中的贵金属。其中一个辉长岩,卡普爱德华霍尔姆杂岩,表现出与层状贵金属成矿有关的不寻常的特征组合。对这些过程的理解需要详细的野外、岩石学、同位素和化学分析,并结合对岩浆热液系统的热力学和输运特征的理论分析。该研究项目的长期计划包括使用这些技术为控制过程的本质提供新的见解:1)辉长岩结晶过程中的贵金属浓度;2)含辉长岩热液体系中贵金属的运移与沉积。研究的一个具体目标是评估各种可能解释该矿床特征的贵金属与硫化物的异常高比率的假设。研究东格陵兰辉长岩的成矿过程对了解贵金属的全球分布和制定未来的矿产勘探战略具有潜在的重要意义。目前的奖励将使他能够在制定实现长期目标的计划时开始。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Dennis Bird其他文献
Dennis Bird的其他文献
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{{ truncateString('Dennis Bird', 18)}}的其他基金
Multi-Mineral Geochronology and REE Geochemistry of High- and Ultrahigh-Pressure Metamorphic Rocks: North Qaidam Terrane, Northwest China
高压和超高压变质岩的多矿物年代学和稀土地球化学:中国西北柴达木地体
- 批准号:
0710927 - 财政年份:2007
- 资助金额:
$ 4.81万 - 项目类别:
Continuing Grant
Collaborative Research on the Iceland Deep Drilling Project: An Investigation of a High-Temperature Mid-Ocean Ridge Hydrothermal System in a 5 km Deep Borehole
冰岛深钻项目合作研究:5公里深钻孔高温洋中脊热液系统研究
- 批准号:
0506882 - 财政年份:2005
- 资助金额:
$ 4.81万 - 项目类别:
Continuing Grant
Zircon Geochronology and REE Geochemistry of High- and Ultrahigh-Pressure Metamorphic Rocks: North Qaidam and South Altun Terranes, Northwest China
高压和超高压变质岩的锆石年代学和稀土地球化学:中国西北柴达木地体和南阿尔金地体
- 批准号:
0408690 - 财政年份:2004
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$ 4.81万 - 项目类别:
Standard Grant
Strontium Attenuation in Basaltic Aquifers: Experimental Determination of Ca2+-Na+-Sr2+-K+ Exchange Between Heulandite and Aqueous Solutions
玄武岩含水层中的锶衰减:片沸石与水溶液之间 Ca2-Na-Sr2-K 交换的实验测定
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0001113 - 财政年份:2000
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$ 4.81万 - 项目类别:
Standard Grant
Seasonal Attenuation and Release of Arsenic by Pyrite Weathering Products, Southern Mother Lode Gold District, California
加利福尼亚州南主矿金区黄铁矿风化产品造成砷的季节性衰减和释放
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9902859 - 财政年份:1999
- 资助金额:
$ 4.81万 - 项目类别:
Standard Grant
Interaction Between the Iceland Mantle-Plume and the Hydrosphere: Tectonic and Climatic Effects on Hydrothermal Solutions
冰岛地幔柱与水圈之间的相互作用:构造和气候对热液的影响
- 批准号:
9506469 - 财政年份:1995
- 资助金额:
$ 4.81万 - 项目类别:
Standard Grant
Precious Metal Mineralization in an Oceanic-Type Layered Gabbro: Kap Edvard Holm Complex, East Greenland
海洋型层状辉长岩中的贵金属矿化:东格陵兰 Kap Edvard Holm 杂岩
- 批准号:
9220431 - 财政年份:1993
- 资助金额:
$ 4.81万 - 项目类别:
Standard Grant
Mass Transfer Processes During Crustal Rifting
地壳裂谷期间的传质过程
- 批准号:
9004007 - 财政年份:1990
- 资助金额:
$ 4.81万 - 项目类别:
Continuing Grant
Geochemical and Structural Evolution of Gabbro-Hosted Magma-Hydrothermal Systems: East Greenland
辉长岩岩浆热液系统的地球化学和结构演化:东格陵兰
- 批准号:
8803754 - 财政年份:1988
- 资助金额:
$ 4.81万 - 项目类别:
Continuing Grant
Reactions and Mass Transfer in the Fluid Source Region of the Skaergaard Magma-Hydrothermal System
斯卡尔加德岩浆热液系统流体源区的反应和传质
- 批准号:
8606256 - 财政年份:1986
- 资助金额:
$ 4.81万 - 项目类别:
Continuing Grant
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