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兰坪白秧坪铜银多金属矿集区西矿带矿床成因
ON THE GENESIS OF ORE DEPOSITS IN WEST METALLOGENETIC ZONE OF BAIYANGPING CU-AG POLYMETALLIC DEPOSIT CONCENTRATION AREA, LANPING
【摘要】 西矿带受瞎眼山断裂和四十里箐-上下庄断裂控制,矿体产于近NS向断裂旁侧次级断裂中,发育典型的中低温热液矿物组合,成矿流体来源于深部的热卤水。硫、铅同位素反映成矿物质具深源特征,稀土元素组成具有极明显的δEu负异常和δCe负异常,构造热流体为成矿的主导因素。成因类型属于推覆构造有关的中低温浅成热液矿床。
【Abstract】 The metallogenetic zone is controlled by the Xiayanshan fault and the Sishiliqing-Shangxiazhuang fault. Ore bodies are occurred in the minor fault beside the fault in nearly NS direction. The typical middle-low temperature hydrothermal mineral assemblage is developed. The metallogenetic fluid originated from the deep hot brine. The S, Pb isotpes show that metallogenetic materials are characterized by the deep genesis. δEu negative anomaly and δCe negative anomaly are very evident in REE composition. The principal factor of metallogenesis is the structural hot fluid. In the genetic type, it belongs to the middle-low temperature shallow hydrothermal ore deposit related to the nappe structure.
【Key words】 Low Temperature Shallow Genesis; Nappe Structure; Deep Hot Brine; Baiyangping,Lanping;
- 【文献出处】 云南地质 ,Yunnan Geology , 编辑部邮箱 ,2005年03期
- 【分类号】P618.2;
- 【被引频次】19
- 【下载频次】144