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辽东五龙金矿围岩片麻状花岗岩的侵位和变形时代:SHRIMP U-Pb年代学制约

杨凤超 杨佳林 顾玉超 沈鑫

杨凤超, 杨佳林, 顾玉超, 等, 2019. 辽东五龙金矿围岩片麻状花岗岩的侵位和变形时代:SHRIMP U-Pb年代学制约. 地质力学学报, 25 (S1): 44-48. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.008
引用本文: 杨凤超, 杨佳林, 顾玉超, 等, 2019. 辽东五龙金矿围岩片麻状花岗岩的侵位和变形时代:SHRIMP U-Pb年代学制约. 地质力学学报, 25 (S1): 44-48. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.008
YANG Fengchao, YANG Jialin, GU Yuchao, et al., 2019. EMPLACEMENT AND DEFORMATION AGE OF SURROUNDING GNEISSIC GRANITE IN WULONG GOLD DEPOSIT, EASTERN LIAONING PROVINCE: SHRIMP U-PB AGE. Journal of Geomechanics, 25 (S1): 44-48. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.008
Citation: YANG Fengchao, YANG Jialin, GU Yuchao, et al., 2019. EMPLACEMENT AND DEFORMATION AGE OF SURROUNDING GNEISSIC GRANITE IN WULONG GOLD DEPOSIT, EASTERN LIAONING PROVINCE: SHRIMP U-PB AGE. Journal of Geomechanics, 25 (S1): 44-48. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.008

辽东五龙金矿围岩片麻状花岗岩的侵位和变形时代:SHRIMP U-Pb年代学制约

doi: 10.12090/j.issn.1006-6616.2019.25.S1.008
基金项目: 

国家重点研发计划 2016YFC0600108

中国地质调查局地质调查项目 DD20160049

详细信息
    作者简介:

    杨凤超, (1982-), 男, 高级工程师, 主要从事矿产预测及研究工作。E-mail:yangfc123@163.com

  • 中图分类号: P618.51

EMPLACEMENT AND DEFORMATION AGE OF SURROUNDING GNEISSIC GRANITE IN WULONG GOLD DEPOSIT, EASTERN LIAONING PROVINCE: SHRIMP U-PB AGE

  • 摘要: 为了确定五龙金矿围岩的侵位和变形时代,进一步探讨辽东地区晚中生代构造体制转折时限,采用岩相学观察和锆石SHRIMP U-Pb定年技术,对辽东五龙大型金矿的围岩五龙岩体、侵入五龙岩体中的花岗斑岩脉和三股流岩体进行了研究。结果表明,五龙岩体具弱片麻状、片麻状构造,花岗斑岩脉也发生了变形作用,三股流岩体未发生变形作用。五龙岩体SHRIMP U-Pb年龄为(159.2±1.9)Ma和(160.0±1.4)Ma,花岗斑岩SHRIMP U-Pb年龄为(132.14±0.85)Ma,三股流岩体SHRIMP U-Pb年龄为122~124 Ma。辽东五龙岩体经历的推覆、挤压事件止于132~124 Ma。辽东地区晚侏罗世的推覆、挤压事件与古太平洋板块向欧亚大陆俯冲作用关系密切,五龙金矿的成矿大地构造背景亦与此次俯冲有关。

     

  • 图  1  辽东五龙岩体及其脉岩的不同岩石照片

    a、b、c、d、e、f—二长花岗岩;g、h、i—花岗斑岩;a、d、g—岩石标本照片;b、e、h—显微镜下单偏光照片(25×);c、f、i—显微镜下正交偏光照片(25×);Qz—石英;Pl—斜长石;Pe—条纹长石;Mic—微斜长石;Bit—黑云母

    Figure  1.  Different rock images of the Wulong rock mass and its veins in eastern Liaoning

    图  2  辽东五龙岩体SHRIMP U-Pb年龄

    Figure  2.  SHRIMP U-Pb age of the Wulong rock mass in eastern Liaoning

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  • 刊出日期:  2019-05-01

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