|本期目录/Table of Contents|

[1]毕君辉,葛文春,张彦龙,等.佳木斯地块东部二叠纪锦山花岗杂岩体的成因及其地质意义[J].地球科学与环境学报,2014,36(04):16-31.
　BI Jun-hui,GE Wen-chun,ZHANG Yan-long,et al.Petrogenesis of Permian Jinshan Granitic Complex in the Eastern Jiamusi Massif and Its Geological Implication[J].Journal of Earth Sciences and Environment,2014,36(04):16-31.
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佳木斯地块东部二叠纪锦山花岗杂岩体的成因及其地质意义(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第36卷
期数:
2014年第04期
页码:
16-31
栏目:
基础地质与矿产地质
出版日期:
2014-12-15

文章信息/Info

Title:
Petrogenesis of Permian Jinshan Granitic Complex in the Eastern Jiamusi Massif and Its Geological Implication
文章编号:
1672-6561(2014)04-0016-16
作者:
毕君辉; 葛文春; 张彦龙; 杨浩; 王智慧
吉林大学地球科学学院,吉林 长春 130061
Author(s):
BI Jun-hui; GE Wen-chun; ZHANG Yan-long; YANG Hao; WANG Zhi-hu
School of Earth Sciences, Jilin University, Changchun 130061, Jilin, China


关键词:
花岗岩; 二叠纪; 锆石U-Pb定年; 岩石成因; 活动大陆边缘; 俯冲作用; 佳木斯地块
Keywords:
granite;  Permian;  zircon U-Pbdating;  petrogenesis;  active continental margin;  subduction;  Jiamusi massif
分类号:
P595;P597
DOI:
-
文献标志码:
A
摘要:
报道了佳木斯地块东部锦山花岗杂岩体的锆石LA-ICPMS U-Pb定年结果、全岩地球化学和锆石Hf同位素特征,确定了花岗质岩石的形成时代、源区性质及其地球动力学背景,同时也为中亚造山带东段的构造演化提供重要线索。花岗岩的锆石主要呈自形—半自形晶,发育显著的震荡生长环带,w(Th)/w(U)值在0.12~1.20之间,显示其典型的岩浆成因。测年结果表明这些花岗质岩石形成于早—中二叠世(260~278Ma)。地球化学特征显示:花岗质岩石w(SiO2)值为66.75%~70.10%,w(Na2O)值为4.40%~5.23%,w(K2O)值为0.77%~2.80%,w(K2O)/w(Na2O)值为0.18~0.61,A/CNK值为0.97~1.14;这些岩石富集大离子亲石元素(Rb、Ba和K),相对亏损高场强元素(Nb、Ta、P、Zr、Ti和Hf)。锆石原位Hf同位素分析显示,花岗岩的εHf(t)值介于-0.8~7.7之间,两阶段Hf模式年龄介于953~1578Ma之间。该区花岗质岩石属于偏铝质—弱过铝质的低钾—中钾钙碱性I型花岗岩,原始岩浆起源于中—新元古代增生的下地壳物质的部分熔融。结合区域研究资料,研究区内早—中二叠世花岗岩就位于活动大陆边缘环境,其形成可能与佳木斯地块东侧古大洋板块的西向俯冲作用有关。
Abstract:
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参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-05-20
基金项目:国家自然科学基金重点项目(41330206);中国地质调查局地质大调查项目(2012000100350001)
作者简介:毕君辉(1988-),女,黑龙江佳木斯人,理学硕士研究生,E-mail:biying2746@126.com。
通讯作者:葛文春(1963-),男,黑龙江富锦人,教授,博士研究生导师,理学博士,E-mail:gewenchun@jlu.edu.cn。
更新日期/Last Update: 2014-12-16