山东五莲七宝山多金属矿区矿物学特征及黄铜矿LA—ICP—MS原位微量元素研究

Analysis on Mineralogical Characteristics and LAICPMS in situ Trace Element in Qibaoshan Polymetallic Mining Area in Wulian County in Shandong Province

摘要:

山东五莲七宝山多金属矿区是一个集金、银、铜、铅、锌、硫铁矿等内生矿产于一区的大型矿区，是中低温次火山热液隐爆角砾岩筒型矿床，其勘查和研究具有非常重要的工业价值和科学意义。本次研究在详细的岩相学、矿相学观察基础上，对七宝山多金属矿区不同隐爆角砾岩筒不同矿石类型样品进行分析研究，结果表明，七宝山多金属矿区的成岩成矿演化过程可划分为六个阶段：黄铁矿石英阶段；黄铜矿辉铜矿斑铜矿黄铁矿石英阶段；镜铁矿±（黄铁矿）±（黄铜矿）石英碳酸盐阶段；黄铜矿黄铁矿方铅矿闪锌矿石英阶段；黄铜矿黄铁矿石英阶段；晚期碳酸盐阶段。黄铜矿LAICPMS原位微量元素分析可知，金线头矿区黄铜矿Se元素含量高于窑头矿区的Se含量，Ag、Pb、Bi元素则相反，金线头矿区和窑头矿区的形成温度较红石岗矿段形成的温度低，而红石岗矿段和窑头矿区中金的富集要高于金线头矿区。

Abstract:

Qibaoshan polymetallic mining area in Wulian county in Shandong province is a large scale mining area that integrates endogenous deposits, such as gold, silver, copper, lead, zinc and pyrite. It is a medium low temperature subvolcanic hydrothermal cryptodome breccia deposit. The exploration and research have a significant industrial and scientific value. Based on detailed petrography and mineralogy observations, samples from different cryptodome breccia types in Qibaoshan polymetallic mining area have been analyzed. It is indicated that the diagenetic and metallogenic evolution in this area can be divided into six stages: pyritequartz stage, chalcopyritecupritechalcopyritepyritequartz stage, specularite±(pyrite)±(chalcopyrite)quartzcarbonate stage, chalcopyritepyritegalenasphaleritequartz stage, chalcopyritepyritequartz stage and late carbonate stage. As showed by situ trace element analysis of chalcopyrite, the content of Se in chalcopyrite in Jinxiantou mining area is higher than that in Yaotou mining area, while the contents of Ag, Pb, and Bi are lower. The formation temperatures of Jinxiantou mining area and Yaotou mining areas are lower than that in Hongshigang ore section, while the gold enrichment in Hongshihang mining area and Yaotou mining areas is higher than that in Jinxiantou mining area.