中国东部中生代岩浆岩的时空分布及其与热液型铀矿的关系
发布时间：2018-10-25 19:20
【摘要】：中国东部中生代岩浆活动强烈,热液型铀矿分布广泛。空间上,自北而南可划分出大兴安岭、小兴安岭-长白山、冀北-辽西、大别山北缘、长江中下游、扬子陆块东南缘、武夷-云开、东南沿海8个火山-侵入岩带和沽源-红山子、青龙-兴城、庐枞-栖霞、赣杭、武夷山、桃山-诸广、郴州-钦州、湘中、雪峰山-摩天岭9个热液型铀成矿带以及满洲里-额尔古纳、扎兰屯、伊春、金寨、天目山5个铀成矿远景带;时间上,从早到晚可划分出250~230Ma、228~205Ma、195~175Ma、165~150Ma、145~130Ma、126~115Ma、110~100Ma、97~80Ma 8个不同时期的岩浆活动和早期深源高温、晚期浅源低温两个成矿系统,深源高温成矿系统可划分出11个矿床式,浅源低温成矿系统可划分出15个矿床式。勘查成果显示,热液型铀矿对岩浆岩的岩性岩相没有选择性,但与特定时期的岩浆岩有密切的关系,其中与花岗岩有关的热液型铀矿主要赋存在三叠纪花岗岩中,与火山岩有关的热液型铀矿主要赋存在早白垩世早期高钾钙碱性流纹岩-碱性粗面岩组合中,而且晚期高侵位小岩体或火山斑岩体的内、外接触带是有利的赋矿部位。
[Abstract]:Mesozoic magmatic activity in eastern China is strong and hydrothermal uranium deposits are widely distributed. Space, from the north to the south can be divided into Daxing'an Mountains, Xiaoxing'anling to Changbai Mountains, Hebei to Western Liaoning, the northern margin of the Dabie Mountains, the middle and lower reaches of the Yangtze River, the southeastern margin of the Yangtze block, and Wuyi to Yunkai. Eight volcanoes-intrusive rock belts and Guyuan-Hongshanzi, Azure Dragon-Xingcheng, Lu Zong-Qixia, Ganhang, Wuyishan, Taoshan-Zhuguang, Chenzhou-Qinzhou, central Hunan, along the southeast coast, Nine hydrothermal uranium metallogenic belts in Xuefengshan-Ferriling Mountains and five uranium metallogenic potential zones in Manzhouli Erguna, Zalantun, Yichun, Jinzhai and Tianmu Mountains; From morning to evening, the magmatic activity and early deep source high temperature in different periods can be divided into two ore-forming systems of 250 ~ 230Ma-228-205Ma-195N, 175Ma-165- 150 Ma-145- (145-) 130Ma, 126- 115Ma-115-Ma-100Ma-9780Ma, and two ore-forming systems of late shallow source and low temperature. The ore-forming system of deep-source high-temperature can be divided into 11 ore-forming systems, and the ore-forming system can be divided into 11 ore-forming systems. The shallow source low temperature metallogenic system can be divided into 15 ore deposit types. The exploration results show that hydrothermal uranium deposits are not selective to the lithofacies of magmatic rocks, but are closely related to magmatic rocks in a specific period, in which hydrothermal uranium deposits related to granites mainly occur in Triassic granites. The hydrothermal uranium deposits related to volcanic rocks are mainly located in the early Cretaceous high-potassium calc-alkaline rhyolite-alkaline trachyte assemblages, and the inner and outer contact zones of the late high-emplacement small rock bodies or volcanic porphyry bodies are favorable ore-hosting sites.
【作者单位】： 东华理工大学核资源与环境国家重点实验室培育基地;东华理工大学地球科学学院;中国科学院地质与地球物理研究所;
【基金】：国家自然科学基金项目(41372071) 中国核工业集团公司项目(中核地计[2008]74号)联合资助
【分类号】：P588.1;P619.14
[Abstract]:Mesozoic magmatic activity in eastern China is strong and hydrothermal uranium deposits are widely distributed. Space, from the north to the south can be divided into Daxing'an Mountains, Xiaoxing'anling to Changbai Mountains, Hebei to Western Liaoning, the northern margin of the Dabie Mountains, the middle and lower reaches of the Yangtze River, the southeastern margin of the Yangtze block, and Wuyi to Yunkai. Eight volcanoes-intrusive rock belts and Guyuan-Hongshanzi, Azure Dragon-Xingcheng, Lu Zong-Qixia, Ganhang, Wuyishan, Taoshan-Zhuguang, Chenzhou-Qinzhou, central Hunan, along the southeast coast, Nine hydrothermal uranium metallogenic belts in Xuefengshan-Ferriling Mountains and five uranium metallogenic potential zones in Manzhouli Erguna, Zalantun, Yichun, Jinzhai and Tianmu Mountains; From morning to evening, the magmatic activity and early deep source high temperature in different periods can be divided into two ore-forming systems of 250 ~ 230Ma-228-205Ma-195N, 175Ma-165- 150 Ma-145- (145-) 130Ma, 126- 115Ma-115-Ma-100Ma-9780Ma, and two ore-forming systems of late shallow source and low temperature. The ore-forming system of deep-source high-temperature can be divided into 11 ore-forming systems, and the ore-forming system can be divided into 11 ore-forming systems. The shallow source low temperature metallogenic system can be divided into 15 ore deposit types. The exploration results show that hydrothermal uranium deposits are not selective to the lithofacies of magmatic rocks, but are closely related to magmatic rocks in a specific period, in which hydrothermal uranium deposits related to granites mainly occur in Triassic granites. The hydrothermal uranium deposits related to volcanic rocks are mainly located in the early Cretaceous high-potassium calc-alkaline rhyolite-alkaline trachyte assemblages, and the inner and outer contact zones of the late high-emplacement small rock bodies or volcanic porphyry bodies are favorable ore-hosting sites.
【作者单位】： 东华理工大学核资源与环境国家重点实验室培育基地;东华理工大学地球科学学院;中国科学院地质与地球物理研究所;
【基金】：国家自然科学基金项目(41372071) 中国核工业集团公司项目(中核地计[2008]74号)联合资助
【分类号】：P588.1;P619.14
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