Mineralogical Characteristics of Skarns in the Huanggang Sn-Fe Deposit of Inner Mongolia and Their Metallogenic Indicating Significance
详细信息
- 责任者：Zhou Zhenhua (Key Laboratory of Metallogeny and Mineral Assessment ; Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; MLR ; Beijing 100037 ; China) ; Liu Hongwei
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2011
- 卷期：30(1)
- 关键词：铁矿 ; iron ores ; 锡矿 ; tin ores ; 内蒙古 ; Inner Mongolia
- 页码：p.97-112
- 图表：6 illus., 4 tables, 56 refs.
- 分类号：1001
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
The Huanggang Sn-Fe deposit is a large-size skarn deposit hosted by Lower Permian marble of Huanggangliang Formation. Its skarn mineral assemblage mainly consists of diopside, andradite-grossular and vesuvianite, and its retrograde minerals include actinolite-tremolite, epidote, chlorite, sericite, grossular etc. Electron microprobe analyses show that the end member of garnet in the early stage is dominated by andradite, while that in the major ore-forming stage is dominated by grossular, and that the end member of pyroxene has changed greatly, composed mainly of diopside and hedenbergite. Components of garnet and pyroxene are Adr28.69～96.44Grs2.00～67.38 (Prp+Sps) 0.67～5.69 and Di11.8～94.12Hd4.08～81.28Jo1.79～20.02, respectively, their wide compositional variation range suggests that skarns were not formed under the totally enclosed equilibrium condition.
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