中国地质2011，Vol.38Issue(1)：103-108,6.
福建东山县澳角村澳角群花岗质石榴黑云片麻岩锆石SHRIMP U-Pb定年及其地质意义
Zircon U-Pb SHRIMP isotopic dating of granitic garnet-biotite gneiss of the Aojiao Group at Aojiao Village of Dongshan County,Fujian Province,and its geological significance
摘要
Abstract
In this paper the authors conducted zircon U-Pb SHRIMP isotopic dating of the granitic garnetbiotite gneiss of the Aojiao Group at Aojiao Village of Dongshan County in Fujian Province. The Th/U ratios in the range of 0.31-1.01 (0.48 on average) show that the zircon is a typical magmatic mineral. The weighted mean 206Pb/238U age is 152.8±1.6 Ma (n=17,MSWD=1.12), which is considered to be the formation age of the gneiss.Some conclusions have been reached:(1)The granitic garnet-biotite gneiss of the Aojiao Group was formed in late Jurassic rather than in pre-Devonian; (2)the Qinyingshan Formation of the Aojiao Group should be divided into metamorphic intrusions and metamorphic sedimentary strata.关键词
福建东山县/澳角群亲营山组/花岗质石榴黑云片麻岩/锆石SHRIMP U-Pb定年/地质意义分类
天文与地球科学引用本文复制引用
冯艳芳,齐钒宇,邓晋福,肖庆辉,邢光福,陆松年,崔显岳,公凡影,甄世民,贾德龙..福建东山县澳角村澳角群花岗质石榴黑云片麻岩锆石SHRIMP U-Pb定年及其地质意义[J].中国地质,2011,38(1):103-108,6.基金项目
东部沿江沿海经济区基础地质综合研究项目(1212010610611),全国重要矿产成矿地质背景研究项目(1212010733802),中国东部中生代大陆岩石圈剧变过程、动力学机制与矿产资源响应项目(1212010711814),张家口大麻坪橄榄岩底辟体及脉状苦橄岩的初步研究项目(GPMR0735)资助. （1212010610611）
