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西天山巴尔盖提花岗岩体年龄、地球化学特征与构造意义

高山林

高山林. 西天山巴尔盖提花岗岩体年龄、地球化学特征与构造意义[J]. 石油实验地质, 2017, 39(3): 362-369. doi: 10.11781/sysydz201703362
引用本文: 高山林. 西天山巴尔盖提花岗岩体年龄、地球化学特征与构造意义[J]. 石油实验地质, 2017, 39(3): 362-369. doi: 10.11781/sysydz201703362
Gao Shanlin. Geochronology, geochemical properties and tectonic significance of Baergaiti granitoid in western Tianshan Mountain, NW China[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 362-369. doi: 10.11781/sysydz201703362
Citation: Gao Shanlin. Geochronology, geochemical properties and tectonic significance of Baergaiti granitoid in western Tianshan Mountain, NW China[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 362-369. doi: 10.11781/sysydz201703362

西天山巴尔盖提花岗岩体年龄、地球化学特征与构造意义

doi: 10.11781/sysydz201703362
基金项目: 中国石化油田部项目“海域盆地勘探动态跟踪及选区评价部署研究”(G5800-16-ZS-YTB025)资助。
详细信息
    作者简介:

    高山林(1966-),男,高级工程师,从事油气盆地构造分析。E-mail:gaosl.syky@sinopec.com。

  • 中图分类号: TE121.2

Geochronology, geochemical properties and tectonic significance of Baergaiti granitoid in western Tianshan Mountain, NW China

  • 摘要: 巴尔盖提花岗岩体位于伊犁盆地北缘西天山博罗霍洛构造带。锆石LA-ICP-MS U-Pb年龄(374±7.0)Ma显示岩体侵位于晚泥盆世。岩石为斑状黑云母花岗岩,其主量元素SiO2、Al2O3、K2O、Na2O的含量分别为70.72%~79.12%,9.87%~14.51%,4.13%~5.54%,2.87%~4.35%,富碱、高钾、低镁钛,属高钾钙碱性系列;轻稀土相对富集,(La/Yb)N为7.61~16.31,具有显著的负Eu异常;相对富集大离子亲石元素Rb、U和Th等,亏损Nb、Ta和Ti等高场强元素,地球化学特征总体显示了I-A花岗岩过渡特征。区域上地层不整合关系、沉积特征及地球化学构造图解特征综合分析表明,巴尔盖提花岗岩体形成于晚泥盆世区域性造山后伸展背景,与石炭纪火山-沉积建造构成了晚古生代完整的开合构造演化旋回。

     

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  • 收稿日期:  2016-12-25
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