| 新疆尾亚地区中元古代菊花山岩组地质特征 |
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| 引用本文： | 冯新昌. 新疆尾亚地区中元古代菊花山岩组地质特征[J]. 新疆地质, 1996, 0(4) |
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| 作者姓名： | 冯新昌 |
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| 作者单位： | 新疆维吾尔自治区地质矿产局第一区域地质调查大队 |
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| 摘 要： | 在尾亚车站以东的中元古界长城系星星峡岩群，由云山岩组、菊花山岩组和剑峰山岩组组成。其中菊花山岩组为一套古蛇绿岩，按有序排列为：变安山岩、玄武岩（阳起石片岩）－变辉绿岩－变花岗间长斑岩、变暗色堆晶闪长岩－变辉长岩、变堆晶辉长岩－变橄榄辉石岩、斜长岩。通过对菊花山岩组古蛇绿岩的岩石学、岩石地球化学特征的分析研究和构造环境的探讨，认为星星峡岩群的古构造环境为裂谷环境，并建立构造演化模式。
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| 关 键 词： | 尾亚，星星峡岩群，菊花山岩组，古蛇绿岩，裂谷环境 |
GEOLOGICAL CHARACTERISTICS OF JUHUASHAN FORMATION OF MIDDLE PROTEROZOIC IN WEIYA AREA OF EAST TIANSHAN, XINJIANG |
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| Feng Xinchang. GEOLOGICAL CHARACTERISTICS OF JUHUASHAN FORMATION OF MIDDLE PROTEROZOIC IN WEIYA AREA OF EAST TIANSHAN, XINJIANG[J]. Xinjiang Geology, 1996, 0(4) |
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| Authors: | Feng Xinchang |
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| Abstract: | A set of moderately-slightly metamorphosed rocks expose in xingxingxia Group of changcheng System of Middle Proterozoic east of Weiya station, consisting of Yunshan Formation, Juhuashan Formation and Jianfengshan Formation. Juhuashan Formation is composed of a set of paleo-ophiolites which include meta-andesite basalt(actinodite schists),meta-diabase, apogranodiopophyrite, dark intercumulus meta-diorite,meta-gabbro, intercumulus meta-gabbro, meta-peridotite pyroxene anorthosite. Yunshan Formation and Jianfengshan Formation consist of flysch sediments which include silicalite (already be quartzite) and acidic volcanics(already be anorthositic-andesinitic schists) etc. The analysis of lithology and geochemistry of paleo-ophiolites of Juhuashan Formation, and of tectonic setting shows that Xingxingxia Group is of rift valley environment. A model of tectonic evolution is also set up. |
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| Keywords: | Weiya Xingxingxia Group Juhuashan Formation paleo-ophiolites rift-valley environment |
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