川西花岗岩型铀矿成矿条件与找矿方向
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摘要
川西地区构造运动强烈,岩浆活动频繁,具有多期次、多阶段的特点,从加里东期到喜山期均有岩浆活动,以印支期最为强烈,分布较为广泛,岩石类型复杂。文章从成矿地质背景、岩体成因类型、花岗岩含铀性、控矿构造、热液活动以及典型铀矿化特征等方面,对川西地区花岗岩型铀矿成矿条件进行了分析,指出川西地区具备形成花岗岩型铀矿的基本地质条件,区内应以寻找花岗岩内外接触带型铀矿为找矿主攻方向。
Tectonic movement and magmatic activity is intensive and frequent in Western Sichuan which is characterized with multi-phase and multi-stage from Caledonian to Himalayan.Magamatism was especially intensive in Indosinian,which is widely distributed and with complex rock type.The forming condition of granite type uranium deposit in Western Sichuan was discussed in the geological background,genesis of granite,uranium content in granite,ore controlling structure,hydrothermal activity and typical mineralization,and the area was believed to bear the basic geological conditions for the formation of granite type uranium deposits,the main orientation of next step prospecting should be the inner and outer contact zone along the granite.
Tectonic movement and magmatic activity is intensive and frequent in Western Sichuan which is characterized with multi-phase and multi-stage from Caledonian to Himalayan.Magamatism was especially intensive in Indosinian,which is widely distributed and with complex rock type.The forming condition of granite type uranium deposit in Western Sichuan was discussed in the geological background,genesis of granite,uranium content in granite,ore controlling structure,hydrothermal activity and typical mineralization,and the area was believed to bear the basic geological conditions for the formation of granite type uranium deposits,the main orientation of next step prospecting should be the inner and outer contact zone along the granite.
引文
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[2]解波,孙泽轩.川西地区构造演化与铀多金属成矿关系[C].中国核科学技术进展报告(第2卷),2011,285-288.
[3]解波,杜小林,莫帮洪,等.四川西部昌台-稻城地区花岗岩铀成矿潜力调查[R].核工业280研究所,2012.
[4]许志琴,侯立玮,王宗秀,等.松潘-甘孜造山带的造山过程[M].北京:地质出版社,1992.1-190.
[5]熊盛青,丁燕云,李占奎,等.西藏及西南三江深断裂构造格局新认识[J].地球物理学报,2014,57(12):4097-4109.
[6]张克信,潘桂棠,何卫红,等.中国构造-地层大区划分新方案[J].地球科学,2015,40(2):206-233.
[7]张能德.川西白玉-稻城地区花岗岩类的年龄[J].四川地质学报,1994,14(2):88-99.
[8]吴涛,肖龙,高睿,等.藏东雀儿山复式花岗岩体成因及构造背景:年代学、地球化学与锆石Lu-Hf同位素制约[J].地球科学,2014,44(8):1791-1806.
[9]郭宁,孙泽轩,康友纯.西南地区铀资源勘查突破方向研究[J].东华理工大学学报(自然科学版),2012,35(1):23-29.
[10]陈友良,王四利,杜小林,等.藏东“三江”地区热液型铀矿成矿条件与找矿方向[J].铀矿地质,2012,28(5):257-264.
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