| Strate—bound Anorthites in the Dachang Sn—Polymetallic Ore Field,Guangxi,China |
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| 引用本文： | 潘家华 G.C.AMSTUTZ 等.Strate—bound Anorthites in the Dachang Sn—Polymetallic Ore Field,Guangxi,China[J].中国地球化学学报,1993,12(3):261-269. |
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| 作者姓名： | 潘家华 G.C.AMSTUTZ |
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| 作者单位： | [1]InstituteofMineralDeposits,ChineseAcademyofGeologicalSciences,Beijing,100037 [2]Mneralogish－Petrographis,ChineseAcademyofGeologicalSciences,Beijing,100037 |
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| 摘 要： | From the petrological study of ore-hosting focks which contain large anorthits crystals and the occurrence and chemical composition of anorthites and related minerals,the authors consider that the large anorthite crystals are of authigenic origin. The distribution characteristics of anorthites,i.e.,they are distributed along the bedding and structurally weak zones but not restricted to synsedimentary slump structures,and the relationship for some elements between anorthites and other minerals indicate that anorthites have resulted from reaction of circulating alkaline solutions rich in Al and Si with carbonated during the Indosinian orogeny.The results of this work suggest that the association of authigenic anorthites with bedded orebodies in the Dachang ore field may be the evidence that the mineralization is related to circulating underground hot waters.
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| 关 键 词： | 钙长石 自生作用 锡矿床 铝 成矿作用 |
Strata—bound anorthites in the Dachang Sn-poly metallic ore field,Guangxi, China |
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| Pan Jiahua,G. C. Amstutz,G. Moh.Strata—bound anorthites in the Dachang Sn-poly metallic ore field,Guangxi, China[J].Chinese Journal of Geochemistry,1993,12(3):261-269. |
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| Authors: | Pan Jiahua G C Amstutz G Moh |
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| Institution: | 1. Chinese Academy of Geological Sciences, Institute of Mineral Deposits, 100037, Beijing
2. Mineralogish-Petrographisches Institüt der Universit?t Heidelberg, Neuenheimer Feld 236, Heidelberg, Germany
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| Abstract: | From the petrological study of ore-hosting rocks which contain large anorthite crystals and the occurrence and chemical composition
of anorthites and related minerals, the authors consider that the large anorthite crystals are of authigenic origin.
The distribution characteristics of anorthites, i.e., they are distributed along the bedding and structurally weak zones but
not restricted to synsedimentary slump structures, and the relationship for some elements between anorthites and other minerals
indicate that anorthites have resulted from reaction of circulating alkaline solutions rich in Al and Si with carbonates during
the Indosinian orogeny.
The results of this work suggest that the association of authigenic anorthites with bedded orebodies in the Dachang ore field
may be the evidence that the mineralization is related to circulating underground hot waters. |
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| Keywords: | anorthite authigenesis Dachang Sn poly metallic ore deposit |
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