花岗岩凝固深度与热液矿床形成的关系

IF 1.1 4区地球科学 Q3 GEOLOGY

Resource Geology Pub Date : 2007-03-01 DOI:10.1111/j.1751-3928.2006.00004.x

E. Uchida, Sho Endo, M. Makino

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引用次数: 164

摘要

对日本代表性花岗质岩石中黑云母的化学分析表明，总Al (TAl)含量随伴生热液矿床的金属类型而变化，其增加顺序为Pb - Zn和Mo矿床< Cu - Fe和Sn矿床< W矿床<未矿化花岗质岩石。花岗岩中黑云母的TAl含量可作为区分矿化与非矿化花岗岩的有效指标。闪锌矿和角闪石地球气压计测得的花岗岩凝固压力和围岩矿物组合与黑云母的TAl含量呈良好的正相关。这些事实表明，黑云母的TAl含量可以用来估计花岗岩的凝固压力(P)。得到经验方程如下:

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Relationship Between Solidification Depth of Granitic Rocks and Formation of Hydrothermal Ore Deposits

Chemical analysis of biotite in representative granitic rocks in Japan shows that the total Al (TAl) content changes with the metal type of the accompanying hydrothermal ore deposits and increases in the following order: Pb‐Zn and Mo deposits < Cu‐Fe and Sn deposits < W deposits < non‐mineralized granitic rocks. The TAl content of biotite in granitic rocks may be a useful indicator for distinguishing between mineralized and non‐mineralized granitic rocks. A good positive correlation is seen between the TAl content of biotite and the solidification pressure of the granitic rocks estimated by sphalerite and hornblende geobarometers and the mineral assemblages of the surrounding rocks. These facts suggest that the TAl content of biotite can be used to estimate the solidification pressure (P) of the granitic rocks. The following empirical equation was obtained:

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来源期刊

Resource Geology 地学-地质学

CiteScore

2.30

自引率

14.30%

发文量

审稿时长

12 months

期刊介绍： Resource Geology is an international journal focusing on economic geology, geochemistry and environmental geology. Its purpose is to contribute to the promotion of earth sciences related to metallic and non-metallic mineral deposits mainly in Asia, Oceania and the Circum-Pacific region, although other parts of the world are also considered. Launched in 1998 by the Society for Resource Geology, the journal is published quarterly in English, making it more accessible to the international geological community. The journal publishes high quality papers of interest to those engaged in research and exploration of mineral deposits.