摘要
索家沟银铅锌矿为内蒙古乌兰察布地区一新发现的矿床,据现有钻探工程初步估算银金属量1404t,平均品位为232.99×10~(-6);铅+锌的金属量28万吨,平均品位为4.70×10~(-2)。银达到大型规模,铅+锌达中型规模。对该矿床的矿石样品进行了光薄片鉴定及化学全分析、光谱全分析、组合分析测试等研究工作。研究表明:矿床的有用元素为Ag,共(伴)生Pb、Zn;银与方铅矿、闪锌矿密切相关,多分布于闪锌矿及方铅矿间隙内,少部分包裹在方铅矿、石英中;成矿可分为两期(热液成矿期与表生期)。矿床成因为与燕山期酸性火山-侵入活动有关的中低温热液脉状充填型矿床。
Suojiagou Ag-Pb-Zn deposit is a newly discovered deposit found in Ulanqab area,Inner Mongolia.Preliminary estimated amount of the metal is 1404 tons of silver(large ore),lead+280,000 tons of zinc(medium)according to existing drilling projects.The ore samples of the deposit were studied by combination of petrographical identification,chemical analysis and total spectrum analysis,etc.The results of the study show that the useful element of the deposit is Ag,with Pb and Zn as concomitant.Silver has a close symbiosis with the galena and sphalerite,mostly distributed in the gap of galena and sphalerite,and a few are wrapped in the galena and quartz.Metallogenesis can be divided into two stages— hydrothermal mineralization period and supergenetic oxidation period.The deposit is belong to the medium-low temperature hydrothermal vein type deposit associated with acid volcanic-intrusive activity in Yanshanian period.
引文
[1]李香资,岑朝正,权知心,等.内蒙古丰镇市索家沟银铅锌矿普查报告[R].郑州:河南省地质矿产勘查开发局第二地质勘查院,2018:10-200.
[2]常德良,吴铁军,李志江,等.内蒙古自治区勒马戈山铅锌矿地质特征及找矿标志[J].地质找矿论丛,2012,27(3):328-331.
[2]李忠满,王泽,单晓刚,等.小南沟银铅锌多金属矿矿石特征及矿床成因[J].地质找矿论丛,2014,29(2):240-247.
[3]董秀英,唐朝霞,刘湘华,等.广西全州小源铅锌矿地质特征、成因类型及找矿方向探讨[J].地质找矿论丛,2014,29(2):248-253.
[4]吴家富,陈园平,汪鹤林.内蒙古察右中旗乌兰巴山复式岩体的岩石学及地球化学特征[J].地质调查与研究,2012,35(1):22-28.
[5]李华强.内蒙古嘎达坂铅锌多金属矿区综合物探找矿研究[J].地质找矿论丛,2016,31(1):99-107.
[6]韩琼,弓小平,田红彪.激电测量在苏吉泉东金矿勘查中的应用[J]地质找矿论丛.,2016,31(1):108-115.
[7]谢华,伊海生,欧莉华,等.磁化率测量在沉积锰矿床中的应用[J].地质找矿论丛,2016,31(1):116-120.
[8]史超,李书,任正情,等.三维遥感影像在遥感地质构造解译中的应用:以福建平和植被覆盖区为例[J].地质找矿论丛,2016,31(1):127-134.
[9] BEUS A A,GRIGORIAN S V.矿床地球化学勘查方法[M].(前)苏联,1977.