新疆昭苏卡拉盖雷铜钴金矿区火山岩地层构造环境判别
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摘要
卡拉盖雷铜钴金矿区位于新疆西天山伊犁微板块之伊犁裂谷带南缘,那拉提构造带西段。西天山地区位于卡拉库姆-塔里木板块与哈萨克斯坦-准噶尔板块的汇聚地带,自太古宙以来经历了极为复杂的地壳演化史。本文通过地球化学判别图解的投点分析以及与区域地质发展史的对比研究,认为该区大哈拉军山组火山岩的构造背景为大陆弧环境。
Kalagailei Cu-Co-Au deposit is located along the southern margin of the Ili rift belt in the Ili microplate in Western Tianshan Mountain, western part of Nalati tectonic zone, Xinjiang. And Western Tianshan Mountain is situated in the convergence zone of Karakum- Tarim plate and Kazakhstan- Junggar plate. It has a very complex history of crustal evolution since Archean. Through the analysis of geochemical discrimination diagram, and the comparison with regional geological development history, the authors suggest that the tectonic setting of the igneous rocks in the Dahalajunshan Formation belong to continental arc environment.
Kalagailei Cu-Co-Au deposit is located along the southern margin of the Ili rift belt in the Ili microplate in Western Tianshan Mountain, western part of Nalati tectonic zone, Xinjiang. And Western Tianshan Mountain is situated in the convergence zone of Karakum- Tarim plate and Kazakhstan- Junggar plate. It has a very complex history of crustal evolution since Archean. Through the analysis of geochemical discrimination diagram, and the comparison with regional geological development history, the authors suggest that the tectonic setting of the igneous rocks in the Dahalajunshan Formation belong to continental arc environment.
引文
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[2]邓晋福,罗照华,苏尚国.岩石成因、构造环境与成矿作用[M].北京:地质出版社,2004:65-156.
[3]Ben Othman D,White WMet,Patchett J.The geochemistry of marine sediments,island arc magma genesis,and crust-mantle recycling[J].Earth Planet Sci lett,1989,94:1-21.
[4]Sun S S and McDonough W F.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes.In:Saunders A.D.and Norry M.J.(eds.),Magmatism in ocean basins[J].Geol.Soc.London.Spec.Publ.,1989,42:313-345.
[5]车自成,刘洪福,刘良.中天山造山带形成与演化[M].北京:地质出版社,1994.
[6]车自成,刘良,刘洪福.论伊犁古裂谷[J].岩石学报,1996,12(3):478-489.
[7]肖序常,汤耀庆,冯益民.新疆北部及其邻区大地构造[M].北京:地质出版社.1992.
[8]卢华复,贾承造,贾东.库车再生前陆盆地冲断构造楔特征[J].高校地质学报,2001,7(3):478-489.
[9]赵振华,沈远超,涂光炽.新疆金属矿产资源的基础研究[M].北京:科学出版社.2001.
[10]邵铁全,石莹,靳红.新疆西天山大哈拉军山组火山岩岩石化学特征及地质意义[J].新疆地质,2006,24(3):218-222.
[11]朱永峰,周晶,宋彪.新疆“大哈拉军山组”火山岩的形成时代问题及其解体方案[J].中国地质,2006,33(3):487-497.
[12]王博,舒良树,Cluzel D.新疆伊犁北部石炭纪火山岩地球化学特征及其地质意义[J].中国地质,2006,33(3):498-508.
[13]吴淦国,董连慧,薛春纪,等.新疆北部主要斑岩铜矿带[M].北京:地质出版社,2008.
[14]夏林圻,夏祖春,徐学义,等.天山石炭纪大火成岩省与地幔柱[J].地质通报,2004,23(9~10):904-910.