地质论评2011，Vol.57Issue(4)：495-504,10.
伊犁地区果子沟南华系塔里萨依组冰碛岩顶部花岗斑岩年龄及其意义
Granite Porphyry SHRIMP U-Pb Age at Top of the Nanhuan Talisaye Formation in Guozigou, Ili area, and Implications for Glaciogenic Diamictite
摘要
Abstract
There are three diamictite (tillite) units in the Guozigou--Keguqin section in Ili area of the northern part of the Western Tianshan Mountains, which are Qurutielikti Formation (Lower diamictite ),Biexibasitao Formation (Middle diamictite ) and Talisaye Formation (Upper diamictite ) from bottom to top.According to the former study, the Talisaye Formation is still correlated with the Hagriqaok diamictite in Quruqtagh area. This paper reports a magmatic zircon age of 642 ±5 Ma (206Pb/238U) from granite -porphyry, which intrudes into the top of the Talisaye Formation. This dating represents the evolved magma age. Even this is the dating of the intrusive body, yet this is a new evidence for the up limit of the Talisaye Formation. Meanwhile, the Qulutielikti Formation ( Lower diamictite), the Biexibasitao Formation ( Middle diamictite) correlated with Bayxi diamictite and Alatonggou diamictite respectively in Quruqtagh area, so we can put a suggestion that the Talisaye diamictite is correlated with Teruiaiken diamictite and not with Hagriqaok diamictite in Quruqtagh area. So, this paper advanced a new evidence for the Neoproterozoic glaciogenic diamictite between the Guozigou section in the Western Tianshan and some sections in Quruqtagh area in the Eastern Tianshan.关键词
新疆/果子沟/南华系/冰碛岩/SHRIMP/U-Pb年龄Key words
Xinjiang/ Guozigou/ Nanhuan/ diamictite/ tillite/ SHRIMP/ zircon dating引用本文复制引用
高维,张传恒,李永安..伊犁地区果子沟南华系塔里萨依组冰碛岩顶部花岗斑岩年龄及其意义[J].地质论评,2011,57(4):495-504,10.基金项目
本文为中国地质调查局工作项目(编号1212010911071)和教育部长江学者和创性团队发展计划(编号IRT00546)的成果. （编号1212010911071）
