On Failing of the Magmatic Hydrothermal Metallogenic Theory: the Causes and the New Departure
详细信息
- 责任者：Luo Zhaohua (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Lu Xinxiang
- 刊名：Journal of Jilin University
- 出版年：2011
- 卷期：41(1)
- 关键词：岩浆热液矿床 ; magmatic hydrothermal deposit ; 矿床成因论 ; metallogeny
- 页码：p.1-11
- 图表：1 illus., 58 refs.
- 分类号：1001
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
The current magmatic hydrothermal metallogenic theory (MHMT) assumes that the ore-bearing fluids are produced from the magma by fractional crystallization. The Such interpretations are contrary to the observations in the ore fields and the theoretical deductions: 1) there are commonly many minerals which have greater densities than the host magma and melano-microgranular enclaves in the ore-bearing porphyries; 2) there is not any evidence to suggest that the fluid produced by magmatic differentiation will be in action only then when the melt is consolidated, because the fluid is more active than the melt; and 3) the wide compositional spectrum dike swarms are widespread seen in the ore fields. It is suggested that there was not syn-metallogenic large deep chamber beneath the minor intrusion. Therefore, the MHMT found itself in a tight corner not only due to the mass balance. It is necessary to consider new mechanisms related to metallogenesis of the endogenic mineral deposits.
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