| 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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| 引用本文： | 高永伟,郭周平,赵辛敏,王育习,李向民,薛宝林.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[J].现代地质,2018,32(3):468. |
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| 作者姓名： | 高永伟 郭周平 赵辛敏 王育习 李向民 薛宝林 |
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| 作者单位： | (1中国地质调查局 西安地质调查中心，陕西 西安710054；2国土资源部岩浆作用成矿与找矿重点实验室，陕西 西安710054；
3华北地质勘查局 五一九大队，河北 保定071051) |
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| 基金项目： | 国家自然科学基金青年科学基金项目(41602096)；中国地质调查局项目(DD20160012)。 |
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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。
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| 关 键 词： | 水系沉积物 地球化学特征 找矿远景区 冷龙岭地区 北祁连 |
Geochemical Characteristics and Anomalies Identification of Elements
in the Stream Sediments from the Lenglongling Area of
North Qilian Mountains,Qinghai Province |
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| GAO Yongwei,GUO Zhouping,ZHAO Xinmin,WANG Yuxi,LI Xiangmin,XUE Baolin.Geochemical Characteristics and Anomalies Identification of Elements
in the Stream Sediments from the Lenglongling Area of
North Qilian Mountains,Qinghai Province[J].Geoscience——Journal of Graduate School,China University of Geosciences,2018,32(3):468. |
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| Authors: | GAO Yongwei GUO Zhouping ZHAO Xinmin WANG Yuxi LI Xiangmin XUE Baolin |
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| Institution: | 1Xi’an Center of Geological Survey, China Geological Survey, Xian, Shaanxi710054,China;
2Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MLR, Xi’an, Shaanxi710054,China;
3No519 Team,North China Geological Exploration Bureau,Baoding, Hebei071051,China |
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| Abstract: | 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. The abundance 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. |
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| Keywords: | stream sediment geochemical characteristic metallogenic prospective area Lenglongling area North Qilian |
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