辽东矿洞沟地区四张磙子古元古代花岗岩识别及意义

doi:10.12068/j.issn.1005-3026.2016.09.027

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (9): 1349-1352.DOI: 10.12068/j.issn.1005-3026.2016.09.027

辽东矿洞沟地区四张磙子古元古代花岗岩识别及意义

张朋¹，赵岩²，杨宏智²，寇林林²

(1. 吉林大学地球科学学院，吉林长春130061； 2. 中国地质调查局沈阳地质调查中心，辽宁沈阳110034)

收稿日期:2015-05-20 修回日期:2015-05-20 出版日期:2016-09-15 发布日期:2016-09-18
通讯作者: 张朋
作者简介:张朋(1983-)，男，辽宁盘锦人，吉林大学博士研究生.
基金资助:
国家自然科学基金青年基金资助项目(41502093)；中国地质调查局项目(12120113058700).

Discrimination and Its Significance of the Sizhanggunzi Granite in Kuangdonggou Area， Eastern Liaoning Province

ZHANG Peng¹， ZHAO Yan²， YANG Hong-zhi²， KOU Lin-lin²

1. College of Earth Sciences， Jilin University， Changchun 130061， China; 2. Shenyang Center of Geological Survey， China Geology Survey， Shenyang 110034， China.

Received:2015-05-20 Revised:2015-05-20 Online:2016-09-15 Published:2016-09-18
Contact: ZHAO Yan
About author:-
Supported by:
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摘要/Abstract

摘要： 为深入研究辽宁盖州四张磙子花岗岩的形成时代、地质特征及意义，通过锆石LA-ICP-MS U-Pb定年系统和X射线荧光光谱仪，对四张磙子花岗岩进行年龄测试和主微量元素分析.锆石定年结果表明，四张磙子花岗岩侵位年龄为(1871.2±9.3)Ma，属于古元古代产物.主微量元素结果表明，四张磙子花岗岩与矿洞沟正长岩及闪长岩的SiO₂与K₂O及Na₂O基本呈现正相关，与TiO₂，Al₂O₃，TFe₂O₃，CaO，MgO，MnO呈负相关，表明3种岩体可能具有亲缘关系.结合前人研究，认为四张磙子花岗岩与矿洞沟正长岩、闪长岩可能具有同一岩浆来源，四张磙子花岗岩为古元古代侵位的花岗岩体.

关键词: 锆石U-Pb年龄, 四张磙子花岗岩, 矿洞沟岩体, 古元古代, 克拉通化

Abstract: To better understand the formation age， geological features and significance of the Sizhanggunzi granite in Gaizhou， Liaoning Province， formation age and major trace elements were studied by zircon LA-ICP-MS U-Pb dating system and X-ray fluorescence spectrometers. Zircon U-Pb dating yielded the emplacement age of (1871.2±9.3)Ma， which indicates Sizhangguanzi granite is the product of Paleoproterozoic magmatism in Gaizhou. The results of major trace element testing on the target granite revealed the Sizhanggunzi granite and Kuangdonggou intrusions all intruded in Paleoproterozoic. In the Sizhanggunzi granite and syenite and diorite in Kuangdonggou reigon， SiO₂ had a relevant positive correlation with K₂O and Na₂O and good negative correlations with TiO₂，Al₂O₃，TFe₂O₃，CaO，MgO and MnO. This also represent the three intrusions probably have genetic relationship. Combining with previous studies， this study indicates Sizhanggunzi granite intruded in Paleoproterozoic and evolved from the identical magma of Kuangdonggou syenite and diorite.

Key words: zircon U-Pb dating, Sizhanggunzi granite, Kuangdonggou intrusions, Paleoproterozoic, cratonization

中图分类号:

P588

张朋，赵岩，杨宏智，寇林林. 辽东矿洞沟地区四张磙子古元古代花岗岩识别及意义[J]. 东北大学学报:自然科学版, 2016, 37(9): 1349-1352.

ZHANG Peng， ZHAO Yan， YANG Hong-zhi， KOU Lin-lin. Discrimination and Its Significance of the Sizhanggunzi Granite in Kuangdonggou Area， Eastern Liaoning Province[J]. Journal of Northeastern University Natural Science, 2016, 37(9): 1349-1352.

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辽东矿洞沟地区四张磙子古元古代花岗岩识别及意义

Discrimination and Its Significance of the Sizhanggunzi Granite in Kuangdonggou Area， Eastern Liaoning Province

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