西秦岭中寨—十里铺地区水系沉积物测量找矿效果
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摘要
中寨—十里铺地区处于寨上超大型金矿的西部,成矿条件有利。通过在该区开展1/5万水系沉积物测量工作,对区内17种元素的地球化学特征进行了研究,认为中寨—十里铺地区的地层单元是对成矿有利的地球化学块体。运用数理统计方法,分析了成矿元素的相对丰度和相对变异系数特征,以及元素富集程度,指出多金属成矿的有利部位。通过计算成矿元素在不同地层单元中的找矿潜力指数(K×Cv),评价了各地层单元的成矿潜力。通过对研究区内17种元素的R型聚类分析,研究了元素的相关性特征及其空间分布规律,讨论了各元素在空间上的分布特征和组合关系。根据异常的地球化学特征、地层和断裂,优选出4处成矿远景区。在此基础上,开展异常查证,部署工程揭露,发现了3处金锑矿点,取得了良好的找矿效果。
Zhongzhai-Shilipu area is located in the west of the Zhaishang super-large gold mine area,and its metallogenic conditions are favorable.The 1 ∶50 000 stream sediment survey is carried out in this area.The geochemical characteristics of 17 elements in this area are studied,which showed that the stratigraphic units of Zhongzhai-Shilipu area are the favorable geochemical blocks.Using the method of mathematical statistics,the relative abundance,relative coefficient of variation and enrichment degree of ore-forming elements were analyzed,and the favorable parts of polymetallic mineralization were pointed out.The metallogenic potential of each stratigraphic unit was evaluated by calculating prospecting potential index(k× Cv)of ore-forming elements in different strata.The correlative character and spatial distribution of elements are studied,the spatial distribution characteristics and combination relations are discussed by R cluster analysis of 17 elements from 3 904 samples in the working area.According to the abnormal geochemical characteristics,strata and fault structure,four mineralization prospects are selected.On the basis of carrying out abnormal verification and deploying the project,three Au-Sb ore occurrences were found,and achieved good prospecting effect.
Zhongzhai-Shilipu area is located in the west of the Zhaishang super-large gold mine area,and its metallogenic conditions are favorable.The 1 ∶50 000 stream sediment survey is carried out in this area.The geochemical characteristics of 17 elements in this area are studied,which showed that the stratigraphic units of Zhongzhai-Shilipu area are the favorable geochemical blocks.Using the method of mathematical statistics,the relative abundance,relative coefficient of variation and enrichment degree of ore-forming elements were analyzed,and the favorable parts of polymetallic mineralization were pointed out.The metallogenic potential of each stratigraphic unit was evaluated by calculating prospecting potential index(k× Cv)of ore-forming elements in different strata.The correlative character and spatial distribution of elements are studied,the spatial distribution characteristics and combination relations are discussed by R cluster analysis of 17 elements from 3 904 samples in the working area.According to the abnormal geochemical characteristics,strata and fault structure,four mineralization prospects are selected.On the basis of carrying out abnormal verification and deploying the project,three Au-Sb ore occurrences were found,and achieved good prospecting effect.
引文
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[19]Zheng Weijun,Liu Xinhui,Chen Caihua.1∶50 000 strea msediment survey integrative appraisa in Zhaishang gold deposit,Gansu Province[J].Gold Science and Technology,2012,20(4):43-48.[郑卫军,刘新会,陈彩华.甘肃寨上金矿床1∶5万水系沉积物测量综合评价[J].黄金科学技术,2012,20(4):43-48.]
[2]Zhang Bimin.Advances in the research of geochemical exploration methods in special landscape areas of western China[J].Geophysicaland Geochemical Exploration,2008,32(5):473-476.[张必敏.我国西部特殊景观区化探方法研究进展[J].物探与化探,2008,32(5):473-476.]
[3]Chen Lizi,Liu Mannian,Yang Shuanhai,et al.Geochemical characteristics of stream sediments and ore-prospecting orientation of Taxiu-Qushi’an area at the junction of Qinling and Kunlun[J].Geophysical and Geochemical Exploration,2015,39(5):897-903.[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.]
[4]Wei Liyong,Liu Mannian,Zhao Changcun,et al.Regional geological and mineral investigation report of I487003017(Tangnaihai township)and other four sheets[R].Beijing:Gold Headquarter of CAPF,2014.[魏立勇,刘满年,赵常存,等.I487003017(唐乃亥乡)等4幅区域地质矿产调查报告[R].北京:武警黄金指挥部,2014.]
[5]Chen Caihua,Liu Xinhui,Chen Lizi,et al.Anomaly evaluation of 1∶50 000 stream sediment survey in Caoping-Jiujianfang area,Shaanxi Province[J].Gold Science and Technology,2012,20(5):34-39.[陈彩华,刘新会,陈力子,等.陕西曹坪—九间房一带1∶5万水系沉积物异常评价[J].黄金科学技术,2012,20(5):34-39.]
[6]Zhang Erpeng.Northwest Regional Stratum[M].Wuhan:China University of Geosciences Press,1998.[张二朋.西北地区区域地层[M].武汉:中国地质大学出版社,1998.]
[7]Xu Xueyi.Geological Map(1∶500 000)of Qinling and Adjacent Areas[M].Xi’an:Xi’an Center of Geological Survey of China Geological Survey,2015.[徐学义.秦岭及邻区地质图(1∶50万)[M].西安:中国地质调查局西安地调中心,2015.]
[8]Yang Yu.Lithostratigraphy in Gansu Province[M].Wuhan:China University of Geosciences Press,2008.[杨雨.甘肃省岩石地层[M].武汉:中国地质大学出版社,2008.]
[9]Gansu Provincial Bureau of Geology and Mineral Resources.Gansu Province Regional Geology[M].Beijing:Geological Publishing House,1989.[甘肃省地质矿产局.甘肃省区域地质志[M].北京:地质出版社,1989.]
[10]Li Xiaojiang,Zheng Yanrong.Regional geological and mineral investigation report of I48E009008(Zhongzhai township)and other two sheets[R].Beijing:Gold Headquarter of CAPF,2016.[李小江,郑艳荣.I48E009008(中寨乡)等2幅区域地质矿产调查报告[R].北京:武警黄金指挥部,2016.]
[11]Luo Xianrong,Wen Meilan,Ouyang Fei,et al.Exploration Geochemistry[M].Beijing:Metallurgical Industry Press,2007.[罗先熔,文美兰,欧阳菲,等.勘查地球化学[M].北京:冶金工业出版社,2007.]
[12]Shi Yanxiang,Ji Hongjin,Lu Jilong,et al.Factor analysis method and application of stream sediment geochemical partition[J].Geology and Prospecting,2004,40(5):73-76.[时艳香,纪宏金,陆继龙,等.水系沉积物地球化学分区的因子分析方法与应用[J].地质与勘探,2004,40(5):73-76.]
[13]Wu Xisheng.Processing Methods of Geochemical Data[M].Beijing:Geological Publishing House,1993:61-65.[吴锡生.化探数据处理方法[M].北京:地质出版社,1993:61-65.]
[14]Zhang Benren,Gao Shan,Zhang Hongfei,et al.Geochemistry of Qinling Orogenic Belt[M].Beijing:Science Press,2002.[张本仁,高山,张宏飞,等.秦岭造山带地球化学[M].北京:科学出版社,2002.]
[15]Liu Wenhui.Appling concentration decent value to determine regional metallogenic elements[J].Gansu Science and Technology,2009,25(1):41-44.[刘文辉.应用浓幅分位值对确定区域成矿元素的探讨[J].甘肃科技,2009,25(1):41-44.]
[16]Institute of Geochemistry,Chinese Academy of Sciences.Advanced Geochemistry[M].Beijing:Science Press,2000.[中国科学院地球化学研究所.高等地球化学[M].北京:科学出版社,2000.]
[17]Liu Xinhui,Liu Jiajun,Zhang Zhengjing,et al.Study on the metallogenesis and mineralization model of super-giant Zhaishang gold deposit in West Qinling[J].Gold Science and Technology,2010,18(5):220-224.[刘新会,刘家军,张争京,等.西秦岭寨上特大型金矿床成矿作用及成矿模式研究[J].黄金科学技术,2010,18(5):220-224.]
[18]Chen Caihua,Liu Xinhui.Distribution of polymetallic deposits and metallogenic prediction in East Qinling[J].Gold Science and Technology,2010,18(4):106-112.[陈彩华,刘新会.东秦岭(陕西境内)多金属矿产分布特征及成矿预测研究[J].黄金科学技术,2010,18(4):106-112.]
[19]Zheng Weijun,Liu Xinhui,Chen Caihua.1∶50 000 strea msediment survey integrative appraisa in Zhaishang gold deposit,Gansu Province[J].Gold Science and Technology,2012,20(4):43-48.[郑卫军,刘新会,陈彩华.甘肃寨上金矿床1∶5万水系沉积物测量综合评价[J].黄金科学技术,2012,20(4):43-48.]