摘要
新疆阿尔泰两棵树铁矿床位于阿尔泰南缘克朗盆地,产于花岗岩体与地层接触带的伟晶岩脉中。应用LA-ICP-MS锆石U-Pb测年法,获得该矿区花岗岩的结晶年龄为(376.7±1.3)M a,属中泥盆世晚期岩浆活动的产物,同时该年龄限定两棵树铁矿床为中泥盆世晚期成矿。它与同时代的花岗岩有相同的构造背景,即形成于活动大陆边缘环境。
The Liangkeshu iron deposit in Xinjiang Uygur Autonomous Region is located in the Kelang basin at the south margin of Altay orogenic belt.It occurs in pegmatite dikes found in the contacts between the monzoni-tic granite pluton and stratum.LA-ICP-MS zircon UPb method yields a（376.7±1.3） Ma age of granite crystallization.This age indicates that the granite is the product of magmatic activities occurred in late Middle Devonian,meanwhile the age limits that Liangkeshu pegmatite iron deposit formed in late Middle Devonian.The granite has the same tectonic background as the contemporary granite,namely formed in active continental margin environment.
出处
《现代地质》
CAS
CSCD
北大核心
2011年第4期712-719,共8页
Geoscience
基金
国家自然科学基金项目(40972069
40863001)
新疆维吾尔自治区自然科学基金项目(2010211A08)
"十一五"国家科技支撑计划重点项目(2006BAB07B02-01)
中国地质调查局地质调查工作项目(1212010786006)
