| 李明培,米静远,蒋同昌,李静琴.陕西紫阳县西北部下志留统梅子垭组地球化学特征[J].矿产勘查,2017,8(2):223-228 |
| 陕西紫阳县西北部下志留统梅子垭组地球化学特征 |
| Geochemical characteristics of Meiziya formation in lower Silurian system in northwestern Ziyang, Shaanxi |
| 投稿时间：2016-07-12 |
| DOI： |
| 中文关键词: 成矿元素 矿化蚀变带 梅子垭组 紫阳县 陕西 |
| 英文关键词: ore-forming elements, mineralized alteration zone, Meiziya formation, Ziyang county,Shaanxi |
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| 中文摘要: |
| 为了研究紫阳西北部梅子垭组岩石地球化学特征及元素富集规律,文章以岩石地球化学、沉积学、数理统计的方法为理论基础,对梅子垭组上岩性段、下岩性段、硅化蚀变带、含炭黄铁矿化蚀变带、褐铁矿化蚀变带、断层破碎带等地质单元进行系统的采样、测试和分析。结果表明Au、Ag、Pb为紫阳县西北部梅子垭组的主成矿元素,含炭黄铁矿化蚀变带、褐铁矿化蚀变带是Au、Ag的有利富集单元,硅化蚀变带是Pb的有利富集单元,成矿元素的富集与沉积—变质作用关系密切。 |
| 英文摘要: |
| In order to study the rock geochemical characteristics and elements enrichment regulities in Meiziya formation of Lower Silurian system in the northwestern Ziyang county, the systematical sampling, laboratory analysis and integrated study were conducted for the upper lithologic member, the lower lithologic member of Meiziya formation, silicified altered belt, carbon-bearing pyrite alteration belt, limonitization alteration belt and fracture zone by means of rock geochemistry, sedimentology and mathematical statistics methods etc.. Results showed that the Au, Ag and Pb elements were main ore-forming elements in Meiziya formation, and the carbon-bearing pyrite alteration belt and limonitization alteration belt were enrichment layers of Au and Ag elements, and the silicified alteration belt was enrichment layer of Pb element. Enrichment of ore-forming elements are closely related to sedimentary metamorphism process. |
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