| 杨书桐.黄铁矿的环带结构与金矿源的关系——以皖南东至金矿化区为例[J].地质找矿论丛,1993,(2):53-60 |
| 黄铁矿的环带结构与金矿源的关系——以皖南东至金矿化区为例 |
| IMPLICATION OF THE ZONAL TEXTURE OF GOLD-BEARING PYRITES ON GOLD SOURCE: AN EXAMPLE FROM DONGZHI GOLD METALLOGENIC FIELD, SOUTHERN ANHUI |
| 投稿时间：1992-04-17 |
| DOI：10.6053/j.issn.1001-1412.1993.2. 006 |
| 中文关键词: 双重环带结构 金矿源 成岩后生作用 东至金矿化区 |
| 英文关键词: |
| 基金项目:国家七·五攻关项目子课题 |
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| 摘要点击次数: 1111 |
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| 中文摘要: |
| 本文通过对产于中元古界木坑组地层中的含金黄铁矿的矿物学成分研究,发现不少黄铁矿具有双重环带特征.含金黄铁矿在沉积成岩及后生作用过程中,其边缘由于处在相对开放体系里直接与粒间流体接触,从而受到流体的交代作用,使得一部分金被释放出来作为新的矿源被吸附富集在上部的炭硅泥建造里,同时黄铁矿颗粒边缘演变为沉积型特点;其核部由于封闭效应,使得金难以释放出来,成因上仍保留原始物源区成因特征.因此,黄铁矿边缘和核部造成的成分差和成因差就组成了双重环带结构即成分环带和成因环带.另外本文也进一步说明了含金黄铁矿的成分环带结构是金矿源得以活化转移的有利条件. |
| 英文摘要: |
| Based on the study of sedimentary disseminated pyrites in Late Mid-Proterozoic Mukeng formation, the paper has demonstrated that double zonal texture, i.e. compositional and genetic zonation existed in gold-bearing pyrites. Its rim, subject to the reworking of fluids and reequilibrium, genetically proved sedimentary and also released a large amount of gold which turned to be potential sources; In a contrary, its core stayed unchanged because of closed protection effect. The zonal texture within pyrites shows great importance on gold prospecting and exploration. |
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