内蒙古阿拉善左旗乌拉尚德地区AS2化探异常特征及找矿前景分析
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摘要
乌拉尚德地区位于塔里木陆块北东缘增生带,是铁、金、铜、钼、镍矿的有利找矿靶区。为查明该区元素地球化学异常特征,为资源潜力评价和实现找矿突破提供依据。论文在扎敏敖包一带1∶20万水系沉积物测量的基础上,通过统计分析该区元素的地球化学参数、对乌拉尚德地区的AS2地球化学异常特征进行剖析研究和以1∶5万水系沉积物加密测量、地质路线踏勘检查为主的三级查证工作。认为AS2综合异常成矿地质条件有利,元素组合齐全,单元素异常叠合好,具叠加晕、多建造晕特征。异常区有两个浓集中心,划分为2个子异常,已知铅锌矿点与异常浓集中心套合好,并新发现伴生有铜、钍、银、锰、砷、锑等多种有益组分。矿带深部铜族元素和钍、镍含量明显增高,外围矿化蚀变发育,深部及外围找矿潜力巨大,该异常为一显著矿致异常。AS2异常区成矿地质条件有利,地球化学异常特征明显,地表矿化蚀变广泛发育,是寻找热液型Cu、Pb、Zn、Ag、Th、As、Sb多金属矿的有利靶区。
Ulashande is located in the northeastern margin of the Tarim Block. It is an advantageous prospecting target for iron, gold, copper, molybdenum, and nickel. In order to find out the characteristics of elemental geochemical anomalies in the area, it provides a basis for the evaluation of resource potential and the realization of prospecting breakthroughs. Based on the measurement of 1:200,000 river sediments in Zamin Minbao area, this paper analyzes the geochemical parameters of the elements in the area, analyzes the features of AS2 geochemical anomalies in Ulashande area, and uses 1:50000 water system sediments. The three-level verification work is mainly based on material encryption surveys and geological route surveys. It is believed that the comprehensive anomalous mineralization geological conditions of AS2 are favorable, the elemental composition is complete, the single element anomalies are superimposed, and there is a superimposed halo and many built halo features. There are two concentration centers in the anomaly zone, which are divided into two sub-anomalies. It is known that the leadzinc ore points and the anomalous concentration centers are well-arranged and new discoveries are associated with copper, antimony, silver, manganese, arsenic, tellurium, and other beneficial effects. The content of copper elements in the deep part of the ore belt and the content of niobium and nickel are significantly higher, and the external mineralization alterations are developed. The prospecting potential in the deep and peripheral areas is huge. The anomaly is a significant mineral anomaly. The anomalous area of AS2 has favorable geological conditions for mineralization, obvious features of geochemical anomalies, extensive surface mineralization and alteration, and is a favorable target area for the exploration of hydrothermal Cu, Pb, Zn, Ag, Th, As, Sb polymetallic ores.
Ulashande is located in the northeastern margin of the Tarim Block. It is an advantageous prospecting target for iron, gold, copper, molybdenum, and nickel. In order to find out the characteristics of elemental geochemical anomalies in the area, it provides a basis for the evaluation of resource potential and the realization of prospecting breakthroughs. Based on the measurement of 1:200,000 river sediments in Zamin Minbao area, this paper analyzes the geochemical parameters of the elements in the area, analyzes the features of AS2 geochemical anomalies in Ulashande area, and uses 1:50000 water system sediments. The three-level verification work is mainly based on material encryption surveys and geological route surveys. It is believed that the comprehensive anomalous mineralization geological conditions of AS2 are favorable, the elemental composition is complete, the single element anomalies are superimposed, and there is a superimposed halo and many built halo features. There are two concentration centers in the anomaly zone, which are divided into two sub-anomalies. It is known that the leadzinc ore points and the anomalous concentration centers are well-arranged and new discoveries are associated with copper, antimony, silver, manganese, arsenic, tellurium, and other beneficial effects. The content of copper elements in the deep part of the ore belt and the content of niobium and nickel are significantly higher, and the external mineralization alterations are developed. The prospecting potential in the deep and peripheral areas is huge. The anomaly is a significant mineral anomaly. The anomalous area of AS2 has favorable geological conditions for mineralization, obvious features of geochemical anomalies, extensive surface mineralization and alteration, and is a favorable target area for the exploration of hydrothermal Cu, Pb, Zn, Ag, Th, As, Sb polymetallic ores.
引文
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[2]朱晓颖.内蒙古北山地区成矿信息提取技术及成矿预测研究[D].北京:中国地质科学院,2007.
[3]李文明,杨生飞,全守村,等.内蒙古月牙山地区地球化学异常特征及找矿远景预测[J].矿产勘查,2017,8(1):101-110.
[4]廖蕾,闫红,张青,等.内蒙古扎敏敖包-银根地球化学分布特征在地质构造研究中的应用[J].物探与化探,2010,34(3):327-331.
[5]翟裕生.中国区域成矿特征探讨[J].地质与勘探,2002,38(5):1-4.
[6]杨建国,谢春林,王小红,等.北山地区基本构造格局及优势矿产资源潜力[M].北京:中国地质出版社,2011.
[7]李会恺,赵强,邢东雪,等.内蒙古阿拉善盟西尼乌苏铜金矿地质特征及找矿潜力分析[J].地质调查与研究,2016,39(4):285-291.
[8]王守光.内蒙古自治区大矿、富矿成矿系统及找矿预测研究报告[R].呼和浩特:内蒙古自治区地质调查院,2012.
[9]邵积东.内蒙古大地构造分区及其特征[J].内蒙古地质,1998,87(2):1-23.
[10]黄增芳,廖蕾,王守光.地球化学块体的理论及应用[J].内蒙古地质,2001,100(3):23-31.
[11]杨帅师.内蒙古北山北带斑岩型矿床特征与成矿系统分析[D].北京:中国地质大学,2012.
[12]杨振德,潘行适,杨易福,等.阿拉善断块及邻区地质构造特征与矿产[M].北京:科学出版社,1988.
[13]李会恺,辛志伟,李敬华,等.内蒙古阿拉善盟西尼乌苏金钨矿地质特征及成因浅析[J].西北地质,2017,50(3):187-197.
[14]张青.内蒙古银根地区元素地球化学特征及地质意义研究[D].北京:中国地质大学,2006.
[15]叶天竺,吕志成,庞振山,等.勘查区找矿预测理论与方法[M].北京:地质出版社,2014.
[16]内蒙古自治区地矿局.内蒙古自治区岩石地层[M].武汉:中国地质大学出版社,1996.
[17]卫平生,张虎权,陈启林,等.银根-额济纳旗盆地下白垩统银根组的确立[J].地层学杂志,2007,31(2):184-189.
[18]内蒙古自治区地矿局.内蒙古自治区区域地质志[M].北京:地质出版社,1991.
[19]张春灌,杨高印,严云奎,等.内蒙古西部银根-额济纳旗盆地航磁异常特征及地质意义[J].地质通报,2012,31(10):1724-1729.
[20]党犇,赵虹,林广春,等.内蒙古西部银根-额济纳旗盆地及邻区二叠纪火山岩的地球化学特征和构造环境[J].地质通报,2012,30(6):923-931.
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