成都理工大学学报（自然科学版）2013，Vol.40Issue(1)：97-105,9.DOI:10.3969/j.issn.1671-9727.2013.01.013
吉林南部荒沟山地区侏罗纪花岗岩地球化学特征及构造意义
Geochemical characteristics and tectonic significance of Jurassic granites in Huanggoushan area, south of Jilin, China
摘要
Abstract
By the field geological survey of the rocks, silicate full analysis, trace elements analysis and LA-ICP-MS zircon U-Pb dating, the authors explore the dynamics environment of the granite from the Huanggoushan area in the south of Jilin Province of China. The results show that the Laotudingzi and Caoshan plutons which LA-ICP-MS zircon U-Pb age is 178～181 Ma, consist mainly of biotite granite in the Huanggoushan area. The intrusions have high silica content (the mass fraction of SiO2 is 72. 04%～73. 68%) and belong to metaluminous to peraluminous high-K calc-alkaline I-type granite. The REE (the mass fraction of ΣREE is 94. 24 × 10-6 ～ 170. 14 × 10-6) have the right-deviation patterns and moderate negative Eu anomaly (δEu = 0. 51 ～ 0. 69). On the primitive mantle-normalized spider diagrams, the granites show positive K, Rb and Th anomalies and negative Ba, P, Ti, Nb, Ta anomalies, having the geochemical characteristics of an active continental margin magmatic arc, and their formation is related to the subduction of the ancient Pacific plate to North China plate.关键词
荒沟山地区/Ⅰ型花岗岩/侏罗纪岩体/构造环境Key words
Huanggoushan area/ I-type granite/ Jurassic pluton/ tectonic setting分类
天文与地球科学引用本文复制引用
秦亚,梁一鸿,胡兆初,刘雪松..吉林南部荒沟山地区侏罗纪花岗岩地球化学特征及构造意义[J].成都理工大学学报（自然科学版）,2013,40(1):97-105,9.基金项目
中国地质调查局项目(1212011120156) （1212011120156）
吉林省科技厅项目(20090480) （20090480）
