新疆索尔库都克铜钼矿床锆石SHRIMP年代学及其地质意义  

Zircon SHRIMP geochronology of Suoerkuduke Cu-Mo deposit in Xinjiang,and its geological significance

作　　者：赵路通[1,2] 王京彬[2,3] 王玉往[2,3] 王莉娟[2,3] 丁汝褔 龙灵利[2] 李德东[2] 

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]北京矿产地质研究院,北京100012 [3]中国科学院矿产资源研究重点实验室、中国科学院地质与地球物理研究所,北京100029

出　　处：《岩石学报》2015年第2期435-448,共14页Acta Petrologica Sinica

基　　金：国家“973”计划项目(2014CB440803;2007CB411304);“十二五”国家科技支撑计划重点项目(2011BAB06B03-05);国家自然科学基金项目(41202064;41030424)联合资助

摘　　要：本文对东准噶尔北缘索尔库都克铜钼矿区出露的含矿粗面英安斑岩、粗面斑岩及赋矿围岩安山玢岩进行了详细的SHRIMP锆石u-Pb年代学研究，结果表明：安山玢岩的成岩年龄为411±4Ma，为早泥盆世，表明该矿的赋矿地层应为下泥盆统托让格库都克组；含矿粗面英安斑岩和粗面斑岩成岩年龄分别为387．6±1．8Ma和383．8±1．7Ma，限定索尔库都克铜钼矿床的成矿时代可能为中泥盆世末，并可能经历了晚石炭世的叠加成矿过程。索尔库都克铜钼矿床含矿斑岩的成岩时代与东准噶尔北缘地区斑岩-矽卡岩型矿床含矿斑岩的主体成岩时限（390-375Ma）一致，表明东准噶尔北缘地区构成一条斑岩-矽专茺Cu-Mo氐辞靠，Detailed zircon SHRIMP U-Pb geochronology analyses is reported in this paper for ore-beating trachy dacite, trachy porphyry and the wall roek-andesitic porphyry from Suoerkuduke Cu-Mu deposit which is in the north margin of the East Junggar. Analysis results show that： the andesitie porphyry was formed at 411±4Ma, this indicate the ore-bearing strata of this deposit should be the Early Devonian Tuoranggekuduke Formation; The ore-bearing traehy daeitc and trachy porphyry were emplaeed at 387. 6 ± 1.8Ma and 383.8 ± 1.7Ma respectively, this restrict the mineragenetic epoch of the this deposit may be the end of the Middle Devonian, and this deposit may have been superimposed and transformed in the Late Carboniferous. The emplacement age of ore- bearing traehy dacite from Suoerkuduke Cu-Mu deposit is consistent with the emplacement age （390 -375Ma） of ore-bearing porphyry from other porphyry-skarn type deposits in the north margin of the East Junggar. Therefore, the north margin of the East Junggar can constitute a oorohvrv-skarn Cu-Mo metallozenic belt.

关 键 词：索尔库都克 锆石SHRIMP年代学 构造背景 东准噶尔 

分 类 号：P588.13[天文地球—岩石学] P597.3[天文地球—地质学]