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西昆仑山加里东期花岗岩类构造的类型及其大地构造意义 总被引:27,自引:7,他引:20
The Caledonian granite
belt in the West Kunlun Mts.is distributed on the south-side of Kudi tectonic belt in
northwest Tibet Plateau.It consists of about 10 representative massifs in studied
area.They were systematically studied,especially on west-side of Datong and Wuyitake
massifs that were in lower degree of study before our work. Four tectonic genesis types——ocean
ridge granites, volcanic arc granites, post-collision uplift granites and late-orogenic
granites have been discriminated according to their features of occurrences,rock
assemblage,facieology and petrogeochemistry.The results indicate that the West Kunlun
Mts.is a Caledonian collision-orogenic belt and it has important significance for
understanding the geological evolution of Tibet Plateau in early Paleozoic era. 相似文献
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永梅会与中下扬子地区的成矿条件对比 总被引:1,自引:0,他引:1
永梅会地区的区域构造,含矿地层和建造,中生代火山火山侵入岩体特征、局控矿构造以及成矿物质来源,硫氢氧同位素、负员位素、年龄同位素等成矿信息,都与扬子区、萍东区已知铜矿集区有许多相似之处。通过对比表明,永梅会地区具有极大的找矿前景。 相似文献
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闽西-湘西北地区呈NW向横跨扬子和华夏两大地体群,显生宙以来形成了6个以上的海相含碳酸锰地层。经过表生氧化作用,构成了以氧化锰为主要组分的优质富锰矿床。表生富集作用取决于原生碳酸锰矿床本身特征以及影响氧化进程的外部条件——气候、地形、地下水循环和新构造运动。 相似文献
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