构造地球化学找矿方法在山东沂南金矿的应用及效果
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摘要
为提高危机矿山找矿效果,运用构造地球化学测量,辅以坑道地质调查及编图、构造蚀变带填图和岩矿测试分析等手段在山东沂南金矿进行了找矿研究。结果表明,中性、酸性岩体接触带附近的寒武系和上元古界层间滑动带控制了矽卡岩型层状金铜矿体的产出,而在远离接触带的部位,高角度次级北北东、北西西-北西向断裂控制了构造蚀变岩型金铜矿体及异常的展布,其亦是矿区重要的控岩和控矿构造类型。Au、Ag、Cu、Mo、As、Sb、Hg是矿液带入的元素,Ti、Cr、V、Rb是围岩经蚀变带出的元素。Au、Cu具有共同迁移和沉淀的特征。构造地球化学找矿在堆金山片区和燕子湖片区取得了重要突破,下一步工作要重视沂沭断裂带附近第四纪覆盖区低缓构造地球化学异常之下隐伏的构造蚀变岩型金矿的找矿。
Tectono-geochemical survey,combined with the underground geological investigation,tectonic alteration zone mapping,and rock and mineral analysis,is applied in exploration of the Yinan gold mine. The results show that the slip zones within the Cambrian and Permian Proterozoic strata the contact of intermediate and felsic rock have controlled the occurrence the skarn type gold-copper mineralization. Far from the contact,secondary NNE and NWW-NW trending faults control the distribution of Au-Cu ore bodies and related alteration. It is also an important rock and ore-controlling structure.Au,Cu,Mo,Ag,As,Sb,Hg are introduced by the ore-forming fluid,whereas Ti,Cr,V,Rb are released from altered wall rocks. Au and Cu show same behavior during transportation and precipitation during the evolution of hydrothermal fluids. Tectonic geochemical prospecting has been successfully applied in the Duijinshan and Yanzihu areas. The next prospecting target would be the structural-controlled altered rock that are covered with Quaternary sediments with low tectonic geochemical anomaly near the Yishu fault zone.
Tectono-geochemical survey,combined with the underground geological investigation,tectonic alteration zone mapping,and rock and mineral analysis,is applied in exploration of the Yinan gold mine. The results show that the slip zones within the Cambrian and Permian Proterozoic strata the contact of intermediate and felsic rock have controlled the occurrence the skarn type gold-copper mineralization. Far from the contact,secondary NNE and NWW-NW trending faults control the distribution of Au-Cu ore bodies and related alteration. It is also an important rock and ore-controlling structure.Au,Cu,Mo,Ag,As,Sb,Hg are introduced by the ore-forming fluid,whereas Ti,Cr,V,Rb are released from altered wall rocks. Au and Cu show same behavior during transportation and precipitation during the evolution of hydrothermal fluids. Tectonic geochemical prospecting has been successfully applied in the Duijinshan and Yanzihu areas. The next prospecting target would be the structural-controlled altered rock that are covered with Quaternary sediments with low tectonic geochemical anomaly near the Yishu fault zone.
引文
董树义,顾雪祥,李科,刘丽,章永梅,程文斌.2010.山东沂南金矿床成矿物质来源探讨.地球与环境,38(3):295-303
高玉杰,郑青林,舒顺龙,赵云龙,丛顺明.2010.金场矿区矿化特征和深部找矿潜力分析.有色金属(矿山部分),62(4):25-28
李洪奎,杨永波,田京祥,李秀章,陈延贵,李英平,刘汉栋.2004.山东沂沭断裂带中段金矿床地质特征.地质与勘探,40(4):27-31
李科,顾雪祥,董树义.2009.山东沂南金铜铁矿床同位素地球化学研究.矿床地质,28(1):93-103
刘丽.2009.山东沂南金矿床成矿流体特征及地质意义.硕士学位论文:北京:中国地质大学(北京):1-96
钱建平.1999.构造地球化学浅议.地质地球化学,27(3):94-101
钱建平.2009.构造地球化学找矿方法及其在微细浸染型金矿中的应用.地质与勘探,45(2):60-67
钱建平,陈宏毅,孙涛,刘纯,白艳萍.2010.山东招远前孙家金矿床地质和元素地球化学研究.地球化学,38(3):213-228
钱建平,陈宏毅,吴小雷,王自国,蒙勇.2011.胶东望儿山金矿成矿构造分析和成矿预测.大地构造与成矿学,35(2):221-231
邱检生,王德滋,任启江.1996.山东沂南金场矽卡岩型金铜矿床地质地球化学特征及矿床成因.矿床地质,15(4):330-340
徐庆国,韩仲文,毋瑞身.1982.山东沂南冶官墓矽卡岩型金矿的某些特点.见:中国地质科学院沈阳地质矿产研究所文集
杨现利.2001.利用岩浆和矿液活动中心寻找矽卡岩型矿床矿体群.有色金属(矿山部分),53(6):25-27
郑子恒,罗根全.1996.利用岩体边部构造形态预测矽卡岩型矿床盲小矿体.有色金属(矿山部分),48(6):26-29
高玉杰,郑青林,舒顺龙,赵云龙,丛顺明.2010.金场矿区矿化特征和深部找矿潜力分析.有色金属(矿山部分),62(4):25-28
李洪奎,杨永波,田京祥,李秀章,陈延贵,李英平,刘汉栋.2004.山东沂沭断裂带中段金矿床地质特征.地质与勘探,40(4):27-31
李科,顾雪祥,董树义.2009.山东沂南金铜铁矿床同位素地球化学研究.矿床地质,28(1):93-103
刘丽.2009.山东沂南金矿床成矿流体特征及地质意义.硕士学位论文:北京:中国地质大学(北京):1-96
钱建平.1999.构造地球化学浅议.地质地球化学,27(3):94-101
钱建平.2009.构造地球化学找矿方法及其在微细浸染型金矿中的应用.地质与勘探,45(2):60-67
钱建平,陈宏毅,孙涛,刘纯,白艳萍.2010.山东招远前孙家金矿床地质和元素地球化学研究.地球化学,38(3):213-228
钱建平,陈宏毅,吴小雷,王自国,蒙勇.2011.胶东望儿山金矿成矿构造分析和成矿预测.大地构造与成矿学,35(2):221-231
邱检生,王德滋,任启江.1996.山东沂南金场矽卡岩型金铜矿床地质地球化学特征及矿床成因.矿床地质,15(4):330-340
徐庆国,韩仲文,毋瑞身.1982.山东沂南冶官墓矽卡岩型金矿的某些特点.见:中国地质科学院沈阳地质矿产研究所文集
杨现利.2001.利用岩浆和矿液活动中心寻找矽卡岩型矿床矿体群.有色金属(矿山部分),53(6):25-27
郑子恒,罗根全.1996.利用岩体边部构造形态预测矽卡岩型矿床盲小矿体.有色金属(矿山部分),48(6):26-29