青海多彩地玛铅锌矿区物化探异常特征
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摘要
应用双频激电法在多彩地玛铅锌矿区圈定出了4条激化异常带,其中2条呈现高幅频率、中低电阻率特征,指示存在矿化体;2条呈现高幅频率、高(中高)电阻率特征,主要由矿化带(体)和断裂构造所引起。矿区西龙弄AS13乙3Pb、Ba地球化学元素异常显示两个高值区,进一步圈定出3个异常,异常主元素为Pb,其次为Ba、Cd和Mo,显示了热液活动的特征。在综合分析多彩地玛铅锌矿区物、化探异常特征的基础上,结合区域地质背景、矿区地质(构造)特征,将为矿区明确找矿方向提供依据。
Four IP anomalous zones were outlined in Duocaidima lead-zinc deposit area by using dual-frequency induced polarization survey. Among them,two zones show features of high amplitude-frequency rate and medium-low electrical resistivity,which indicate the existence of hidden orebodies. And,the other two belts show features of high amplitude-frequency rate and high( medium-high) electrical resistivity,which were caused by the mineralized belts or faults. There are apparent geochemical anomalies of As,Pb and Ba elements in the Xilongnong deposit area,two anomalous zones with intensive values were identified and three anomalies were outlined. The main anomalous element is Pb,followed by Ba,Cd and Mo,which shows the combination characteristics of hydrothermal activity. Based on comprehensive analysis of geophysical and geochemical anomalies in combination with regional geological setting and the ore-controlling structures,the prospecting targets were proposed for the further exploration in the deposit area.
Four IP anomalous zones were outlined in Duocaidima lead-zinc deposit area by using dual-frequency induced polarization survey. Among them,two zones show features of high amplitude-frequency rate and medium-low electrical resistivity,which indicate the existence of hidden orebodies. And,the other two belts show features of high amplitude-frequency rate and high( medium-high) electrical resistivity,which were caused by the mineralized belts or faults. There are apparent geochemical anomalies of As,Pb and Ba elements in the Xilongnong deposit area,two anomalous zones with intensive values were identified and three anomalies were outlined. The main anomalous element is Pb,followed by Ba,Cd and Mo,which shows the combination characteristics of hydrothermal activity. Based on comprehensive analysis of geophysical and geochemical anomalies in combination with regional geological setting and the ore-controlling structures,the prospecting targets were proposed for the further exploration in the deposit area.
引文
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[5]张文权,王昌勇,王生林,等.东莫扎抓矿区物探方法的综合应用效果[J].青海国土经略,2007(4):44-46.
[6]祁生胜.青海省大地构造单元划分与成矿作用特征[J].青海国土经略,2013(5):53-62.
[7]侯增谦,宋玉财,李政,等.青藏高原碰撞造山带Pb-ZnAg-Cu矿床新类型:成矿基本特征与构造控矿模型[J].矿床地质,2008,27(2):123-144.
[8]王召林,侯增谦,杨竹森,等.青海杂多地区新生代构造特征与两种类型矿床的关系[J].矿床地质,2009,28(2):157-169.
[9]田世洪,杨竹森,侯增谦,等.玉树地区东莫扎抓和莫海拉亨铅锌矿床Rb-Sr和Sm-Nd等时线年龄及其地质意义[J].矿床地质,2009,28(6):747-758.
[10]田世洪,杨竹森,侯增谦,等.青海玉树东莫扎抓和莫海拉亨铅锌矿床与逆冲推覆构造关系的确定——来自粗晶方解石Rb-Sr和Sm-Nd等时线年龄证据[J].岩石矿物学杂志,2011,30(3):475-489.
[11]潘彤,罗才让,伊有昌,等.青海省金属矿产成矿规律及成矿预测[M].北京:地质出版社,2006:1-227.
[12]青海省地质矿产勘查开发局.青海省第三轮矿产资源成矿远景区划与找矿靶区预测[R].2003.
[13]骆耀南.西南三江地区造山演化过程及成矿时空分布[J].岩石矿物,2001,21(3):153-159.
[14]青海省有色地勘局矿产勘查院.青海省治多县多彩地区铜多金属矿普查[R].2003:1-474.
[15]青海省地质调查院.1∶25万I46 C 003004(治多县幅)区域地质调查报告[R].2006.