地质科技情报2012，Vol.31Issue(6)：98-101,4.
全吉地块莫河片麻岩原岩侵位年龄的再研究
Re-Determining the Intrusion Age for the Protolith of the Mohe Gneiss in the Quanji Massif
摘要
Abstract
The Mohe gneiss is located at the eastern part of the Quanji Massif. It is a strongly metamorphosed and deformed granodioritic-monzograntic pluton. Previously reported zircon ages for intrusion of its protolith show a difference about ～120 Ma. On the basis of detailed geological survey in the field, we recollected sample and determined 18 U-Pb data on 15 magmatic zircons using LA-ICP-MS technique. The results show an upper intercept age of (2 394 ±31)Ma (2σ) (MSWD=0. 82). Since the zircons have been experienced intensive metamorphism and deformation, we consider that our result is more reasonable because of the intrusion and crystallization age of the gneiss protolith. Our new dating result reveals a granitic intrusion event occurred at ～2. 4 Ga in the Quanji Massif.关键词
莫河片麻岩/侵位年龄/全吉地块Key words
Mohe gneiss/ intrusive age/ Quanji Massif分类
天文与地球科学引用本文复制引用
巴金,龚松林,廖梵汐,张璐..全吉地块莫河片麻岩原岩侵位年龄的再研究[J].地质科技情报,2012,31(6):98-101,4.基金项目
国家自然科学基金项目(40972042 （）
40772041) （）
