青海祁漫塔格地区野马泉花岗闪长岩LA-ICP-MS锆石U-Pb年龄及其地质意义
LA-ICPMS zircon U-Pb age of the Yemaquan granodiorite in the Qimantag area, Qinghai Province and its geological implications
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摘要: 青海东昆仑复合造山带西段的祁漫塔格地区是一个特征显著的侵入岩浆构造带，同时也是重要的多金属成矿带。野马泉铁铜多金属矿是该区较为典型的接触交代矽卡岩型矿床。利用LA-ICP-MS 锆石U-Pb 定年方法，获得该矿区与野马泉铁铜矿床有关的花岗闪长岩体的成岩年龄为226±2Ma；该结果与前人利用辉钼矿Re-Os 法获得的矽卡岩型铜钼多金属矿石和矽卡岩型钼矿石的等时线年龄一致，因此本文厘定野马泉矿区成岩成矿时代为中—晚三叠世。Abstract: Qimantag area in the western part of the East Kunlun orogenic belt is a characteristic intrusive magmatic structural belt, and is also an important polymetallic metallogenic belt. The Yemaquan Fe-Cu polymetallic ore district is a typical contact metasomatism skarn deposit. In this study, the authors obtained the petrogenetic age of the granodiorite (226±2Ma) by using LA-ICP-MS zircon U-Pb dating. The result is in agreement with previous isochron age of 225.0±4.0Ma for skarn copper molybdenum polymetallic ore and 230.1±4.7Ma for skarn type molybdenum ore obtained by molybdenite Re-Os method. It is thus held that the petrogenetic and ore-forming epoch is Middle-Late Triassic.
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Key words:
- skarn-type /
- Fe-Cu deposit /
- Middle-Late Triassic /
- LA-ICP-MS zircon U-Pb ages /
- granodiorite /
- Yemaquan /
- Qimantag
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[1] 刘云华,莫宣学,张雪亭,等.东昆仑野马泉地区矽卡岩矿床地质特征及控矿条件[J].华南地质与矿产,2005,3:18-23.
[2] 宋忠宝,贾群子,张占玉,等.东昆仑祁漫塔格地区野马泉铁铜矿床地质特征及成因探讨[J].西北地质,2010,34(4):209-217.
[3] 潘彤,马梅生,康祥瑞.东昆仑肯德可克及外围钴多金属矿找矿突破的启示[J].中国地质,2001,28(2):17-21.
[4] 潘彤,孙丰月.青海东昆仑肯德可克钴铋金矿床成矿特征及找矿方向[J].地质与勘探,2003,39(1):18-22.
[5] 刘云华,莫宣学,张雪亭,等.东昆仑野马泉地区矽卡岩矿床地球化学特征及其成因意义[J].华南地质与矿产,2006,3:31-36
[6] 李洪普,曹永亮,关有国,等.青海东昆仑山四角羊地区铁多金属矿床的成矿地质特征[J].地质通报,2009,28(6):787-793.
[7] 丰成友,张大权,李东生,等.青海祁漫塔格地区成矿规律研究[J].矿床地质,2010,29(增刊):3-4.
[8] Claesson S,Vertin V,Bayanova T,et al.U-Pb zircon ages from a Devonian carbonatite dyke,Kola peninsula,Russia:a record of geological evolution from the Archaen to the Palaeozoic[J].Lithos,2000,51(1):95-108.
[9] Corfu F,Hanchar J M,Hoskin P W O,et al.Atlas of zircon textures[J].Rev.Mineral.Geochem.,2003,53:469-500.
[10] 何世平,李荣社,王超,等.祁连山西段甘肃肃北地区北大河岩群片麻状斜长角闪岩的形成时代[J].地质通报,2010,29(9):1275-1280.
[11] 柳小明,高山,袁洪林,等.93nm LA-ICPMS对国际地质标准参考物质中42种主量和微量元素的分析[J].岩石学报,2002,18(3):408-418.
[12] Yuan H L,Gao S,Liu X M,et al.Accurate U-Pb age and trace element determinations of zircon by laser ablation-inductively coupled plasma-mass spectrometry[J].Geostandards and Geoanlytical Research,2004,11:357-370.
[13] 谌宏伟,罗照华,莫宣学,等.东昆仑喀雅克登塔格杂岩体的SHRIMP年龄及其地质意义[J].岩石矿物学杂志,2006,25(1):25-32
[14] 陈博,张占玉,耿建珍,等.青海西部祁漫塔格山卡尔却卡铜多金属矿床似斑状黑云二长花岗岩LA-ICP-MS锆石U-Pb年龄[J].地质通报,2012,31(2/3):463-468.
[15] 李光明,沈远超,刘铁兵.东昆仑祁漫塔格地区华力西期花岗岩地质地球化学特征[J].地质与勘探,2001,37(1):73-78.
[16] 宋忠宝,张雨莲,贾群子,等.东昆仑祁漫塔格地区野马泉深部的华力西期花岗闪长岩U-Pb年龄及其意义[J].现代地质,2014,28(6):1161-1169.
[17] 刘成东,莫宣学,罗照华,等.东昆仑壳-幔岩浆混合作用:来自锆石SHRIMP年代学的证据[J].科学通报,2004,49(6):592-602.
[18] 王松,丰成友,李世金,等.青海祁漫塔格卡尔却卡铜多金属矿区花岗闪长岩锆石SHRIMP U-Pb测年及其地质意义[J].中国地质,2009,36(1):74-84.
[19] 李世金,孙丰月,丰成友,等.青海东昆仑鸭子沟多金属矿的成矿年代学研究[J].地质学报,2008,82(7):949-955.
[20] 佘宏全,张德全,景向阳,等.青海省乌兰乌珠尔斑岩铜矿床地质特征与成因[J].中国地质,2007,34(2):306-314.
[21] 刘云华,莫宣学,喻学惠,等.东昆仑野马地区景忍花岗岩锆石SHRIMP U-Pb定年及其地质意义[J].岩石学报,2006,22(10):2457-2463.
[22] 丰成友,李东生,屈文俊,等.青海祁漫塔格索拉吉尔矽卡岩型铜钼矿床辉钼矿铼-锇同位素定年及其地质意义[J].岩矿测试,2009,28(3):223-227.
[23] 张爱奎,刘光莲,莫宣学,等.青海祁漫塔格晚古生代-早中生代侵入岩构造背景与成矿关系[J].西北地质,2012,45(1):9-19.
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