青海北祁连冷龙岭地区水系沉积物元素地球化学特征及异常圈定
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摘要
青海冷龙岭地区位于北祁连成矿段的东段,是形成与海相火山岩有关的块状硫化物矿床及岩浆热液型矿床的有利地区,具有良好的找矿潜力。在1∶5万水系沉积物测量成果的基础上,对青海冷龙岭地区Au、Cu、Pb、Zn等17种元素的地球化学特征进行了初步分析,发现本区Ag、Pb、Zn、W、Sn、Bi、Mo、Ba、Cd等元素丰度明显高于青海省及祁连地区水系沉积物的平均丰度值;元素分布特征显示下奥陶统阴沟群除Hg、La、Ce相对贫化外,各元素都呈现不同程度的浓集,加里东期侵入岩中Ag、Cu、Pb、Zn、W、Au、Sn、Bi等元素富集程度较高,海西期正长岩内Ba、La、Ce等元素富集程度较为显著;R型聚类分析和因子分析显示区内的主要成矿元素组合为Cu-Pb-Ag-Mo-Ba-La-Ce,Au具有独立成矿的潜力。结合元素地球化学参数及富集离散特征,认为本区Au、Ag、Cu、Pb、Zn、Mo、La、Ce等元素具有一定的找矿潜力。本次工作共圈定8个综合异常。根据研究区成矿地质背景、异常特征及查证成果,与该区域内浪力克铜矿床和青分岭金矿床的地质地球化学特征对比研究后,优选出干沙河和三道路圈—倒阳河2个成矿远景区。
The Lenglongling area,located in the eastern segment of the North Qilian metallogenic belt,Qinghai Province,is a favorable area for forming marine volcanic-associated massive sulfide deposits and magmatic hydrothermal deposits,which has a good prospecting potential. The previous 1∶ 200 000 regional geochemical anomalies lacked further detailed analysis. In this paper,based on the results of the 1∶ 50 000 stream sediment survey,the geochemical characteristics of 17 elements,such as Au,Cu,Pb,Zn,etc.,were preliminarily analyzed. Theabundance value of elements such as Ag,Pb,Zn,W,Sn,Bi,Mo,Ba,Cd in the Lenglongling area is much higher than the average background abundance of Qinghai Province and Qilian area; The distribution characteristics of elements show all elements in the Yingou Group are enriched of different degrees except for Hg,La,Ce.The Caledonian intrusive rocks have a higher content of Ag,Cu,Pb,Zn,W,Au,Sn,Bi and the Ba,La,Ce enrichment of the Hercynian syenite is more significant,respectively. R type cluster analysis and factor analysis show that Cu-Pb-Ag-Mo-Ba-La-Ce are the major metallogenic element assemblage in the region and Au had the potential of independent mineralization. The geochemical parameters including the enrichment and discrete characteristics indicate that the survey area might be a prospective area for Au,Ag,Cu,Pb,Zn,Mo,La and Ce.This study has defined eight integrated anomalies. By comparing geological and geochemical characteristics of Langlike copper deposit and Qingfenling gold deposit,in combination with the metallogenic geologic background,the characteristics and verifying results of 1∶ 50 000 geochemical anomalies,the authors delineated two metallogenic prospective areas,namely Ganshahe and Sandaolujuan-Daoyanghe.
The Lenglongling area,located in the eastern segment of the North Qilian metallogenic belt,Qinghai Province,is a favorable area for forming marine volcanic-associated massive sulfide deposits and magmatic hydrothermal deposits,which has a good prospecting potential. The previous 1∶ 200 000 regional geochemical anomalies lacked further detailed analysis. In this paper,based on the results of the 1∶ 50 000 stream sediment survey,the geochemical characteristics of 17 elements,such as Au,Cu,Pb,Zn,etc.,were preliminarily analyzed. Theabundance value of elements such as Ag,Pb,Zn,W,Sn,Bi,Mo,Ba,Cd in the Lenglongling area is much higher than the average background abundance of Qinghai Province and Qilian area; The distribution characteristics of elements show all elements in the Yingou Group are enriched of different degrees except for Hg,La,Ce.The Caledonian intrusive rocks have a higher content of Ag,Cu,Pb,Zn,W,Au,Sn,Bi and the Ba,La,Ce enrichment of the Hercynian syenite is more significant,respectively. R type cluster analysis and factor analysis show that Cu-Pb-Ag-Mo-Ba-La-Ce are the major metallogenic element assemblage in the region and Au had the potential of independent mineralization. The geochemical parameters including the enrichment and discrete characteristics indicate that the survey area might be a prospective area for Au,Ag,Cu,Pb,Zn,Mo,La and Ce.This study has defined eight integrated anomalies. By comparing geological and geochemical characteristics of Langlike copper deposit and Qingfenling gold deposit,in combination with the metallogenic geologic background,the characteristics and verifying results of 1∶ 50 000 geochemical anomalies,the authors delineated two metallogenic prospective areas,namely Ganshahe and Sandaolujuan-Daoyanghe.
引文
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[14]郭周平,赵辛敏,白赟,等.北祁连浪力克铜矿床锆石U-Pb和辉钼矿Re-Os年龄及其地质意义[J].中国地质,2015,42(3):691-701.
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[17]王磊,杨建国,王小红,等.甘肃北山炭山子-黄草泉一带水系沉积物地球化学特征及找矿远景[J].现代地质,2016,30(6):1276-1284.
[18]戴慧敏,代雅键,马振东,等.大兴安岭查巴奇地区水系沉积物地球化学特征及找矿方向[J].现代地质,2012,26(5):1043-1050.
[19]陈力子,刘满年,杨拴海,等.秦昆结合部塔秀-曲什安地区水系沉积物测量地球化学特征及找矿方向[J].物探与化探,2015,39(5):897-903.
[20]陈耀宇,代文军,魏学平,等.甘肃干沙鄂博稀土矿床地质特征及矿床成因分析[J].甘肃地质,2014,23(4):52-62.
[21]刘劲松,邹先武,汤朝阳,等.大巴山地区水系沉积物地球化学特征及找矿方向[J].中国地质,2016,43(1):249-260.
[22]朱炼,顾雪祥,章永梅,等.黑龙江东安-汤旺河矿集区水系沉积物的地球化学特征及找矿远景预测[J].现代地质,2013,27(6):1275-1282.
[23]刘增铁,任家琪,邬介人,等.青海铜矿[M].北京:地质出版社,2008:1-291.
[24]杨文敏,张本旗,张铖.北祁连中段浪力克-牛头山一带地球化学特征[J].甘肃地质,2008,17(2):35-39.
[25]肖文进.甘肃天祝青分岭金矿控矿条件及找矿方向[J].黄金科学技术,2009,17(5):6-10.
[26]王琦,安国堡.北祁连东段冷龙岭-毛毛山地区金矿化地质特征及找矿方向[J].甘肃地质,2006,15(1):53-57.
(1)中国地质调查局西安地质调查中心.青海门源县宁缠河—牛头山一带铜多金属矿调查评价报告.2016:1-253.
(2)青海省地质矿产勘查开发局.青海省第三轮成矿远景区划研究及找矿靶区预测报告.2003:1-325.
(3)中色地科矿产勘查股份有限公司.甘肃天祝青分岭金矿及外围庄浪河地区金矿勘查工作报告.2010:1-77.
[2]李文渊.祁连山岩浆作用有关金属硫化物矿床成矿与找矿[M].北京:地质出版社,2006:1-208.
[3]夏林圻,夏祖春,任有祥,等.北祁连山构造-火山岩浆-成矿动力学[M].北京:中国大地出版社,2001:1-288.
[4]贾群子,杨忠堂,肖朝阳,等.祁连山铜金钨铅锌矿床成矿规律和成矿预测[M].北京:地质出版社,2007:1-313.
[5]余吉远,李向民,马中平,等.北祁连构造带冷龙岭地区火山岩地球化学特征及年代学[J].地质科技情报,2010,29(4):6-13.
[6]任有祥,彭礼贵,李智佩,等.北祁连山清水沟-白柳沟矿田块状硫化物矿床成矿条件和成矿预测[M].北京:地质出版社,2000:1-115.
[7]彭素霞,陈隽璐,程建新,等.北祁连清水沟-白柳沟Fe-S和Pb-Zn-Cu型块状硫化物矿床形成环境探讨[J].地质学报,2013,87(7):1003-1012.
[8]武鹏,李向民,徐学义,等.北祁连山扎麻什地区东沟蛇绿岩LA-ICP-MS锆石U-Pb测年及其地球化学特征[J].地质通报,2012,31(6):896-906.
[9]熊子良,张宏飞,张杰.北祁连东段冷龙岭地区毛藏寺岩体和黄羊河岩体的岩石成因及其构造意义[J].地学前缘,2012,19(3):214-227.
[10]冯益民,何世平.祁连山大地构造与造山作用[M].北京:地质出版社,1996:1-112.
[11]葛肖虹,刘俊来.北祁连造山带的形成与背景[J].地学前缘,1999,6(4):223-230.
[12]夏林圻,夏祖春,赵江天,等.北祁连山西段元古宙大陆溢流玄武岩性质的确定[J].中国科学:D辑,2000,30(1):1-8.
[13]夏林圻,李向民,余吉远,等.祁连山新元古代中-晚期至早古生代火山作用与构造演化[J].中国地质,2016,43(4):1087-1138.
[14]郭周平,赵辛敏,白赟,等.北祁连浪力克铜矿床锆石U-Pb和辉钼矿Re-Os年龄及其地质意义[J].中国地质,2015,42(3):691-701.
[15]毛景文,杨建民,张招崇,等.甘肃寒山剪切带型金矿床地质地球化学和成因[J].矿床地质,1998,17(1):1-13.
[16]崔晓亮,刘婷婷,王文恒,等.东昆仑布青山地区水系沉积物测量地球化学特征及找矿方向[J].物探与化探,2011,35(5):573-578.
[17]王磊,杨建国,王小红,等.甘肃北山炭山子-黄草泉一带水系沉积物地球化学特征及找矿远景[J].现代地质,2016,30(6):1276-1284.
[18]戴慧敏,代雅键,马振东,等.大兴安岭查巴奇地区水系沉积物地球化学特征及找矿方向[J].现代地质,2012,26(5):1043-1050.
[19]陈力子,刘满年,杨拴海,等.秦昆结合部塔秀-曲什安地区水系沉积物测量地球化学特征及找矿方向[J].物探与化探,2015,39(5):897-903.
[20]陈耀宇,代文军,魏学平,等.甘肃干沙鄂博稀土矿床地质特征及矿床成因分析[J].甘肃地质,2014,23(4):52-62.
[21]刘劲松,邹先武,汤朝阳,等.大巴山地区水系沉积物地球化学特征及找矿方向[J].中国地质,2016,43(1):249-260.
[22]朱炼,顾雪祥,章永梅,等.黑龙江东安-汤旺河矿集区水系沉积物的地球化学特征及找矿远景预测[J].现代地质,2013,27(6):1275-1282.
[23]刘增铁,任家琪,邬介人,等.青海铜矿[M].北京:地质出版社,2008:1-291.
[24]杨文敏,张本旗,张铖.北祁连中段浪力克-牛头山一带地球化学特征[J].甘肃地质,2008,17(2):35-39.
[25]肖文进.甘肃天祝青分岭金矿控矿条件及找矿方向[J].黄金科学技术,2009,17(5):6-10.
[26]王琦,安国堡.北祁连东段冷龙岭-毛毛山地区金矿化地质特征及找矿方向[J].甘肃地质,2006,15(1):53-57.
(1)中国地质调查局西安地质调查中心.青海门源县宁缠河—牛头山一带铜多金属矿调查评价报告.2016:1-253.
(2)青海省地质矿产勘查开发局.青海省第三轮成矿远景区划研究及找矿靶区预测报告.2003:1-325.
(3)中色地科矿产勘查股份有限公司.甘肃天祝青分岭金矿及外围庄浪河地区金矿勘查工作报告.2010:1-77.