安徽省宣城市昆山铜多金属矿化区的地质特征
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摘要
安徽宣城地区昆山铜多金属矿化区位于扬子准地台、下扬子台坳南部边缘。该矿化区的赋矿地层为区域内易于成矿的二叠—三叠系沉积岩,断裂构造为岩浆及矿物质的运移提供了良好的通道,中酸性岩浆的侵入过程中切割、包裹沿途围岩,并与之发生强烈的同化混染、交代作用,实现物质成分的充分交换,为该区易于发生成矿作用的有利条件。物探资料显示研究区存在矿致异常的航磁和重力的分布特征。地质和地球物理特征均指示昆山—狮子山一带是寻找接触带矽卡岩型和层控式矽卡岩型铜矿床的有利地带,具有较好的找矿前景。
The Kunshan Cu-polymetallic mineralization district is located in the south margin area of sub-Yangzi depressed terrane in Xuancheng area,Anhui Province.The Permian-Triassic sedimentary strata are prone to mineralization in this area.The widely distributed faults give favorable channels for the granitoid magmas and hydrothermal fluids.The intermediate-acid magmas cut and enwrap the surrounding rocks and assimilation,contact and metasomatism take place in them during the evolution of the magmas,which becomes the favorable condition of mineralization in the area.Geophysical data further indicate that the magnetic and gravitational abnormalities are probably caused by the mineralization.It is suggested that the Kunshan-Shizishan area has high potentials in exploring the contact and strata-bound skarn Cu deposits according to its geological and geophysical characters.
The Kunshan Cu-polymetallic mineralization district is located in the south margin area of sub-Yangzi depressed terrane in Xuancheng area,Anhui Province.The Permian-Triassic sedimentary strata are prone to mineralization in this area.The widely distributed faults give favorable channels for the granitoid magmas and hydrothermal fluids.The intermediate-acid magmas cut and enwrap the surrounding rocks and assimilation,contact and metasomatism take place in them during the evolution of the magmas,which becomes the favorable condition of mineralization in the area.Geophysical data further indicate that the magnetic and gravitational abnormalities are probably caused by the mineralization.It is suggested that the Kunshan-Shizishan area has high potentials in exploring the contact and strata-bound skarn Cu deposits according to its geological and geophysical characters.
引文
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[14]毛景文,谢桂青,张作衡,等.中国北方中生代大规模成矿作用的期次和相应的地球动力学背景[J].岩石学报,2005,21(1):169-188.
[15]徐晓春,楼金伟,尹滔,等.论安徽铜陵地区侵入岩的岩石系列[J].矿物学报,2009,29(Z1):34-35.
[2]周涛发,范裕,袁峰.2008.长江中下游成矿带成岩成矿作用研究进展[J].岩石学报,24(8):1666-1678.
[3]安徽省地质局区域地质调查队.1∶20万宣城幅区域地质调查报告[R].安徽蚌埠:安徽省地质局区域地质调查队,1974.
[4]安徽省地质矿产局.安徽省区域地质志[M].北京:地质出版社,1986:1-87.
[5]安徽省地质矿产局.安徽省地层志[M].北京:地质出版社,1988:158-161.
[6]华东冶金地质勘查局803队.安徽省宣城县云山(狮子山)铜矿点评价简报[R].安徽马鞍山:华东冶金地质勘查局803队,1962.
[7]华东冶金地质勘查局803队.塔山矿区及外围普查地质小结[R].安徽马鞍山:华东冶金地质勘查局803队,1970.
[8]华东冶金地质勘查局812队.宣城市狮子山铜矿普查地质报告[R].安徽铜陵:华东冶金地质勘查局812队,2005.
[9]袁峰,周涛发,范裕,等.皖赣相邻区燕山期花岗岩类构造背景及其意义[J].合肥工业大学学报:自然科学报,2005,28(9):1130-1134.
[10]郭令智,卢华复,施央申,等.江南中、新元古代岛弧的运动学和动力学[J].高校地质学报,1996,2(1):1-12.
[11]郭令智,施央申,马瑞士,等.论地体构造:板块构造理论研究的最新问题[J].中国地质科学院院报,1984(10):27-34.
[12]朱光,刘国生,牛漫兰,等.郯庐断裂带的平移运动与成因[J].地质通报,2003,22(3):200-207.
[13]周涛发,岳书仓,袁峰.安徽月山矿田成岩成矿作用[M].北京:地质出版社,2004:65-93.
[14]毛景文,谢桂青,张作衡,等.中国北方中生代大规模成矿作用的期次和相应的地球动力学背景[J].岩石学报,2005,21(1):169-188.
[15]徐晓春,楼金伟,尹滔,等.论安徽铜陵地区侵入岩的岩石系列[J].矿物学报,2009,29(Z1):34-35.
目录
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