吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (2): 574-586.doi: 10.13278/j.cnki.jjuese.20170249

• 应用地球化学 • 上一篇    

冀东高家店和蛇盘兔花岗岩体:年代学、地球化学及地质意义

尹业长1, 郝立波1, 赵玉岩1, 石厚礼2, 田午1, 张豫华3, 陆继龙1   

  1. 1. 吉林大学地球探测科学与技术学院, 长春 130026;
    2. 山东省第五地质矿产勘查院, 山东 泰安 271021;
    3. 云南省有色地质局地质地球物理化学勘查院, 昆明 650216
  • 收稿日期:2017-09-30 出版日期:2018-03-26 发布日期:2018-03-26
  • 通讯作者: 陆继龙(1973-),男,教授,博士生导师,主要从事矿产资源地球化学勘查研究,E-mail:lujl@jlu.edu.cn E-mail:lujl@jlu.edu.cn
  • 作者简介:尹业长(1992-),男,博士研究生,主要从事矿产资源地球化学勘查研究,E-mail:yinyc17@mails.jlu.edu.cn
  • 基金资助:
    国家重点研发计划项目（2016YFC0600606）；国土资源部行业专项（SinoProbe-04-05-02）

Gaojiadian Granite and Shepantu Granite in Eastern Hebei Province: Chronology, Geochemistry and Geological Significances

Yin Yechang1, Hao Libo1, Zhao Yuyan1, Shi Houli2, Tian Wu1, Zhang Yuhua3, Lu Jilong1   

  1. 1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
    2. No.5 Exploration Institute of Geology and Mineral Resources, Tai'an 271021, Shandong, China;
    3. Institute of Geological, Geophysical and Geochemical Exploration, Yunnan Nonferrous Metals Geological Bureau, Kunming 650216, China
  • Received:2017-09-30 Online:2018-03-26 Published:2018-03-26
  • Supported by:
    Supported by National Key Research and Development Program (2016YFC0600606) and Specific Funds of Ministry of Land and Resources (SinoProbe-04-05-02)

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摘要： 冀东地区位于华北地台东部燕山台褶带的东段，是我国主要的金矿产出地之一。区内花岗岩大量分布，包括都山、蛇盘兔花岗岩基以及青山口、高家店、贾家山、峪耳崖、罗文峪等岩株。本文对高家店和蛇盘兔岩体进行LA-MC-ICP-MS锆石U-Pb定年和岩石地球化学特征研究。定年结果表明，高家店岩体的成岩时间为（198.8±0.8）Ma，蛇盘兔岩体成岩时间为（184.7±1.0）Ma，岩体形成时代都为早侏罗世。研究区内的岩石为弱过铝质I-A过渡型高钾钙碱性花岗岩类，Na2O+K2O质量分数高，富集大离子亲石元素（LILE）和轻稀土元素（LREE），亏损高场强元素（HFSE），且δEu集中于0.14~0.82，具有明显负铕异常的特性，表明成岩物质来源于壳源，形成于后碰撞环境。

关键词: 冀东, 花岗岩, LA-MC-ICP-MS锆石U-Pb 定年, 地球化学特征, 构造环境, 金矿

Abstract: Jidong region, located in the North China platform and eastern Yanshan platform fold belt, is one of the important metallogenetic gold provinces in China. There are plenty of granites in this region, such as Dushan granitic batholith, Shepantu granite batholith, Qingshankou, Gaojiadian, Jiajiashan, Yuerya, and Luowenyu granites. The LA-MC-ICP-MS zircon U-Pb ages of the Gaojiadian and Shepantu granites show that the formationtime of the Gaojiadian granite is (198.8±0.75) Ma,and the Shepantu granite is (184.7±1.0) Ma, belonging to the Early Jurassic of Yanshanian. In the study area, the rocks are of I-A transition type with weakly peraluminous characteristic and high-K calc-alkaline. Among them the Early Jurassic granitoids is much more enriched in (Na2O+K2O), LILE and LREE, and poor in HFSE. Besides, it has obvious negative europium anomaly with the δEu of 0.14-0.82. All these show that the diagenetic material came from the shell and mineralized after the collision.

Key words: eastern Hebei Province, granite, LA-MC-ICP-MS zircon U-Pb dating, geochemical characteristics, tectonic environments, gold deposit

中图分类号: 

  • P59
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