青海省共和县占顺铜钨多金属矿床找矿潜力评价
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摘要
青海省共和县占顺铜钨多金属矿床位于西秦岭与东昆仑造山带碰撞相结合的鄂拉山造山带的北部、玛温根山西侧和占顺山东北地区。其成研究区带隶属昆仑成矿省东昆仑前寒武、晚古生代、中生代金铜铅锌铁成矿带。该矿床主要包括沙龙瓜孔、占顺南、占顺北三个地区,是一个以铜、银、金为主的钨、铅、锌多金属矿床。
沙龙瓜孔为矽卡岩矿床,通过c-n-f图解、K-A图解和A-C-(FM)图解对沙龙瓜孔矽卡岩进行原岩恢复原分析,判定矽卡岩原岩为泥灰质沉积岩和碳酸盐岩。矿体中有利用价值的主要元素为铜、银、砷,Cu:5.0~5.9%,Ag:33~34g/t,As:1.56~1.58%,且Ag含量与As呈正相关性。对闪长岩进行微量元素分析得出Ag含量可达0.175μg/g,Cu含量可达142.91μg/g,都远超于中国陆壳元素的丰度,而灰岩中Ag仅为0.028μg/g,Cu仅为43.97μg/g,初步认为闪长岩为成矿提供了物质来源。
占顺南花岗闪长岩类型为I型与S型的混合型,矿体赋存于花岗闪长岩破碎带中,其中Cu:1.58%,Ag:17g/t,Au:0.87~1.2g/t,对花岗闪长岩进行微量元素测试得出Ag:0.185μg/g,Cu:34.04μg/g,初步认为花岗闪长岩为Ag成矿物质来源,Cu来源有待进一步研究。
综合以上认识再结合Cu、W、Ag、Au、Pb、Zn土壤地球化学异常特征,在本区有潜力找到以Cu、Ag、Au主,伴生W、Pb、Zn的多金属矿床,并圈定了较好的找矿靶区。
Zhanshun Cu-W Multi-metal deposit is in the location of the northern of Elashan mountain belt, the west of Mawengen, and the northeast of Zhanshun, which seated at the collision combination of West Qinling and East Kunlun orogenic belt. Metallogenic belt belong to the province of East Kunlun Precambrian, Paleozoic, Mesozoic gold and copper zinc iron ore belt. The deposit is a lead, zinc, metal deposits, which mainly composed of copper, tungsten, silver, and gold, contains Shalongguakong and Zhanshunnan two regions.
Shalongguakong is a skarn deposits, through analyze the original rock of the skarn by c-n-f diagram, K-A diagram and A-C-(FM) diagram, we found that original rock of skarn are marly sedimentary rocks and carbonate rocks. The useful elements in the ore are copper, silver, arsenic, Cu:5.0~5.9%, Ag:33~34g/t, As:1.56~1.58%,Ag and As were positively correlated. Through the trace elements analysis of diorite we found that Ag contents up to 0.175μg / g, Cu contents of up to 142.91μg / g, Ag and As are far exceed that of the Chinese continental crust abundances, while the limestone Ag only 0.028μg / g, Cu only 43.97μg / g, the preliminary view that diorite provided material for the ore source.
The type of Zhanshunnan’s Granodiorite is mixed of I type and S type, ore bodies occur in granodiorite fracture zone, Cu:1.58%, Ag:17g/t, Au:0.87~1.2g/t, trace elements analysis conclude that granodiorite provided Ag for the ore source, The source of Cu needs further study.
Combined the above recognizing with Cu, W, Ag, Au, Pb, Zn soil geochemical anomalies, this area has the potential to find Cu, Ag, Au associated with W, Pb, Zn multi-metal deposits and delineates prospecting targets.
沙龙瓜孔为矽卡岩矿床,通过c-n-f图解、K-A图解和A-C-(FM)图解对沙龙瓜孔矽卡岩进行原岩恢复原分析,判定矽卡岩原岩为泥灰质沉积岩和碳酸盐岩。矿体中有利用价值的主要元素为铜、银、砷,Cu:5.0~5.9%,Ag:33~34g/t,As:1.56~1.58%,且Ag含量与As呈正相关性。对闪长岩进行微量元素分析得出Ag含量可达0.175μg/g,Cu含量可达142.91μg/g,都远超于中国陆壳元素的丰度,而灰岩中Ag仅为0.028μg/g,Cu仅为43.97μg/g,初步认为闪长岩为成矿提供了物质来源。
占顺南花岗闪长岩类型为I型与S型的混合型,矿体赋存于花岗闪长岩破碎带中,其中Cu:1.58%,Ag:17g/t,Au:0.87~1.2g/t,对花岗闪长岩进行微量元素测试得出Ag:0.185μg/g,Cu:34.04μg/g,初步认为花岗闪长岩为Ag成矿物质来源,Cu来源有待进一步研究。
综合以上认识再结合Cu、W、Ag、Au、Pb、Zn土壤地球化学异常特征,在本区有潜力找到以Cu、Ag、Au主,伴生W、Pb、Zn的多金属矿床,并圈定了较好的找矿靶区。
Zhanshun Cu-W Multi-metal deposit is in the location of the northern of Elashan mountain belt, the west of Mawengen, and the northeast of Zhanshun, which seated at the collision combination of West Qinling and East Kunlun orogenic belt. Metallogenic belt belong to the province of East Kunlun Precambrian, Paleozoic, Mesozoic gold and copper zinc iron ore belt. The deposit is a lead, zinc, metal deposits, which mainly composed of copper, tungsten, silver, and gold, contains Shalongguakong and Zhanshunnan two regions.
Shalongguakong is a skarn deposits, through analyze the original rock of the skarn by c-n-f diagram, K-A diagram and A-C-(FM) diagram, we found that original rock of skarn are marly sedimentary rocks and carbonate rocks. The useful elements in the ore are copper, silver, arsenic, Cu:5.0~5.9%, Ag:33~34g/t, As:1.56~1.58%,Ag and As were positively correlated. Through the trace elements analysis of diorite we found that Ag contents up to 0.175μg / g, Cu contents of up to 142.91μg / g, Ag and As are far exceed that of the Chinese continental crust abundances, while the limestone Ag only 0.028μg / g, Cu only 43.97μg / g, the preliminary view that diorite provided material for the ore source.
The type of Zhanshunnan’s Granodiorite is mixed of I type and S type, ore bodies occur in granodiorite fracture zone, Cu:1.58%, Ag:17g/t, Au:0.87~1.2g/t, trace elements analysis conclude that granodiorite provided Ag for the ore source, The source of Cu needs further study.
Combined the above recognizing with Cu, W, Ag, Au, Pb, Zn soil geochemical anomalies, this area has the potential to find Cu, Ag, Au associated with W, Pb, Zn multi-metal deposits and delineates prospecting targets.
引文
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赵一鸣,林文蔚,毕承思,等.中国矽卡岩矿床.地质出版社,1990.
赵一鸣,吴良士,白鸽,等.中国主要金属矿床成矿规律[M].北京:地质出版社,2004:411
赵振华.微量元素地球化学原理.北京:科学出版社,1997.
Thompson R.N.,1982,British Tertiary volcanic province.Scott.J.Geol.,18,59-107
White W.M. and Patchett j., Hf-Nd-Sr isotopes and incompatible element aboundances in island arcs:implications for magma origins and crust-mantle evolution. Earth Planet. Sci. Lett.,67,167-185
СиняковВ.И.,МазуровМ.П.,Формапионнытипынпроблемырудоносностискарновшхместорождений.Вкн.”скарншируды”,Новосибирск,”Наука”, Сйбирскоеотделение,с.1983,4-10
北京大学地质学系岩矿教研室.光性矿物学.地质出版社,1979.
陈衍景,常兆山.中国矽卡岩型金矿床地质研究和勘探的进展与问题.有色金属矿产与勘查,1996,5(3):129-139.
陈毓川,王登红,朱裕生,等.中国成矿体系与区域成矿评价[M].北京:地质出版社,2007:1005.
杜光树等.喷流成因矽卡岩与成矿[M].成都:四川科学技术出版社.1998.
高合明.德兴斑岩铜矿床成矿作用动力学与成矿作用复杂性.原子能出版社,1999
黄华胜.矽卡岩矿床的研究现状.地学前缘,1994,1(3-4):105-111.
黎彤,1988,中国陆壳的化学成分,中国科学的进展,地质出版社
黎彤、倪守斌著:《地球和地壳的化学元素丰度》,地质出版社,北京,1990
李昌年.火成岩微量元素岩石学.武汉:中国地质大学出版社,1992.
潘风雏等.西藏甲马喷流矽卡岩型铜多金属矿床地质特征[J].西藏地质.1997,(2):62～73.
青海省地质矿产局.青海区域地质志.地质出版社,1991.
邱家骧,林景仟.岩石化学.北京:地质出版社,1991.
邱瑞龙.铜官山地区矽卡岩型铜金矿床稀土元素特征及其成因意义.地球化学,1994,23(4).
孙延贵,田琪,王青海.西秦岭与东昆仑的侧向碰撞与造山[J].青海地质.2001.
田建涛,喻亨祥,扬准,等.矽卡岩成因及成矿作用研究进展综述.中国科技信息,2005(23):107.
涂光炽.矿床地球化学.北京:地质出版社.1997 ,1～112.
王仁民,贺高品,等.变质岩原岩图解判别法.北京:地质出版社,1986.
王中刚,于学元,赵振华,等.稀土元素地球化学.北京:科学出版社,1989.
肖荣阁,刘敬党,费红彩,等.岩石矿床地球化学[M].北京:地震出版社,2007.
肖文进.青海都兰吉给申地区铜铅锌多金属矿床地质特征及找矿方向[J].矿产与地质,2009,23(1):52-56
杨学明,杨晓勇,等译.岩石地球化学.[英]Hugh R.Rollison著.合肥:中国科学技术大学出版社,2000
姚凤良,孙风月.矿床学教程.地质出版社,2006.
赵一鸣,林文蔚,毕承思,等.中国矽卡岩矿床.地质出版社,1990.
赵一鸣,吴良士,白鸽,等.中国主要金属矿床成矿规律[M].北京:地质出版社,2004:411
赵振华.微量元素地球化学原理.北京:科学出版社,1997.
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