【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-矽卡岩Cu-Mo成矿带。更多还原

【Abstract】 Detailed zircon SHRIMP U-Pb geochronology analyses is reported in this paper for ore-bearing trachy dacite,trachy porphyry and the wall rock-andesitic porphyry from Suoerkuduke Cu-Mu deposit which is in the north margin of the East Junggar.Analysis results show that: the andesitic 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 trachy dacite and trachy porphyry were emplaced 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 orebearing trachy 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 porphyry-skarn Cu-Mo metallogenic belt.更多还原