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时间:2020-04-01
《小赛什腾山斑岩铜钼矿床根部带的特征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、%$$)年2月地球学报_/AG%$$)%2卷)期:%’’#%’3E.NEF-]^.=-+N=E^=+=.E%2()):%’’#%’3小赛什腾山斑岩铜(钼)矿床根部带的特征李大新张德全崔艳合丰成友(中国地质科学院矿产资源研究所,北京,’$$$)*)摘要小赛什腾山斑岩型铜矿床产于柴北缘造山带之西端,+,向柴北缘深断裂和+--向阿尔金深断裂分别从其旁侧通过,这两条深断裂的交汇部位是该矿床含铜斑岩的控岩构造。印支期花岗闪长斑岩呈岩墙状侵位于晚加里东期层状杂岩体的闪长岩相中,环绕该斑岩体发育有斑岩型./(01)矿化及钾硅酸盐化#绢英岩化#青磐岩化蚀变,这些蚀变以斑岩为中心,由内向外依次形成相应的面
2、型蚀变分带。流体包裹体以液相包裹体为主要类型及高温#高盐度为基本特征,其中,在钾硅酸盐化蚀变岩内分布有含盐度达234的含+5.6子晶多相包裹体,均一温度变化于"$$!7$$8之间,测压显示其成矿深度约在’!’(39:,表明该含铜斑岩成矿系统形成于典型的高位、浅成环境。同位素测年结果确认,斑岩铜矿化形成于%’3(";)("!05。详细的研究与对比认为,小赛什腾山铜矿床具有国内斑岩铜(钼)矿体系根部带的特征。关键词斑岩铜(钼)矿床根部带特征小赛什腾山柴北缘!"#$%%&’()&%*&"#+,(%-(,-",./-"(.’%)0"1)123(4%)5#0%-,&<=>5?@ABCDE+F>
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7、K@PSG#B@1A(ETGQ5@6GTU1:R5S5Q@ZGPQ/TMPK1VPQK5QQKGO@51P5@PK@QGABPK5ATGR1P@Q@PQKGS11QY1AG1W5AGS1TGT./(01)R1SRKMSM(9#1:%);-R1SRKMSM./(01)TGR1P@QS11QY1AGO@51P5@PK@QGABPK5ATGR1P@Q+1SQKX5@T5:小赛什腾山铜矿是柴北缘地区在晚华力西—印侧为古生代晚奥陶世滩间山群火
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