ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

    • 中文核心期刊
    • CSCD收录期刊
    • 中国科技核心期刊
    • Scopus收录期刊
高级检索

汉南杂岩高桥沟花岗斑岩体岩石地球化学特征及侵位机制时代归属探讨

吴新斌, 吴凡, 毛友亮, 李岩

吴新斌, 吴凡, 毛友亮, 等. 汉南杂岩高桥沟花岗斑岩体岩石地球化学特征及侵位机制时代归属探讨[J]. 西北地质, 2023, 56(4): 329-335. DOI: 10.12401/j.nwg.2022047
引用本文: 吴新斌, 吴凡, 毛友亮, 等. 汉南杂岩高桥沟花岗斑岩体岩石地球化学特征及侵位机制时代归属探讨[J]. 西北地质, 2023, 56(4): 329-335. DOI: 10.12401/j.nwg.2022047
WU Xinbin, WU Fan, MAO Youliang, et al. Petrological Characteristics and Emplacement Mechanism of the Gaoqiaogou Granitic Porphyry in the Hannan Complex: A Geochemistry Approach[J]. Northwestern Geology, 2023, 56(4): 329-335. DOI: 10.12401/j.nwg.2022047
Citation: WU Xinbin, WU Fan, MAO Youliang, et al. Petrological Characteristics and Emplacement Mechanism of the Gaoqiaogou Granitic Porphyry in the Hannan Complex: A Geochemistry Approach[J]. Northwestern Geology, 2023, 56(4): 329-335. DOI: 10.12401/j.nwg.2022047

汉南杂岩高桥沟花岗斑岩体岩石地球化学特征及侵位机制时代归属探讨

基金项目: 陕西省地质调查院项目“陕西省1∶5万中子铺、宁强、黎坪幅区域地质调查”(1212010010502)资助。
详细信息
    作者简介:

    吴新斌(1969−),男,高级工程师,长期从事区域地质调查及矿产勘查工作。E−mail:wuxinbin163@163.com

  • 中图分类号: P588.121

Petrological Characteristics and Emplacement Mechanism of the Gaoqiaogou Granitic Porphyry in the Hannan Complex: A Geochemistry Approach

  • 摘要:

    高桥沟花岗斑岩体位于扬子板块北缘,属于汉南杂岩的一部分。锆石LA−MCP−MS U−Pb定年结果显示其形成时代为(794.4±5.7)Ma,为南华纪早期。岩石地球化学特征为高Si(75.78%~76.51%)、富碱(K2O+Na2O=7.78%~7.84%)、富K(K2O/Na2O=1.07~1.10),属高钾钙碱性系列。稀土总量∑REE为272.57×10–6,轻重稀土元素组之间分馏明显。二长花岗斑岩形成于岩浆演化中晚期阶段,岩浆上侵过程中部分熔融沉积岩、火山岩物质。高桥沟花岗斑岩体形成于后造山构造环境,强力就位的侵位机制。

    Abstract:

    Gaoqiaogou granite porphyry is a part of Hannan Complex, which is located in the northern margin of the Yangtze plate. LA−MCP−MS U−Pb dating of Zircon indicates that the Zircon was formed at (794.4±5.7) Ma in the early South China epoch. The Rock Geochemistry is characterized by high silicon (75.78%~76.51%) , high alkali (K2O+Na2O=7.78%~7.84%) , high potassium (K2O/Na2O=1.07~1.10) , high potassium calcium alkaline series, total rare earth elements ∑REE=272.57×10–6, and obvious fractionation between light and heavy rare earth elements. The monzonitic granite porphyry was formed in the middle and late stage of magmatic evolution. The material of partial melting sedimentary rock and volcanic rock in the process of magma intrusion. The Gaoqiaogou granite porphyry was formed in the post-orogenic tectonic environment and emplaced strongly.

  • 图  1   扬子板块北缘大地构造略图(a)南郑区黄官镇一带地质简图(b)据陕西省地质调查院,2008修改)及高桥沟一带地质简图(c)(据陕西省地质调查院,2013修改)

    1.第四系;2.二叠系—三叠系;3.奥陶系—志留系;4.寒武系,5.上震旦统—下寒武统灯影组;6.下震旦系统陡山沱组;7.南沱组;8.中元古界上两组;9.花岗斑岩;10.钾长花岗岩;11.英云闪长岩;12.角闪辉长岩;13.二长花岗岩;14.黑云石英闪长岩;15.断层;16.地质界线;17.脉动接触关系;18.锆石U–Pb同位素年龄采样点

    Figure  1.   (a) Geological sketch map of the Northern Yangtze Block, (b) Huangguan and (c) Gaoqiao simplified geological maps

    图  2   高桥沟二长花岗斑岩野外特征(a)及显微镜下特征(b)

    Figure  2.   (a) The field characteristics and (b) micropotographof monzonitic granite porphyry

    图  3   二长花岗斑岩锆石的阴极发光(CL)图像

    Figure  3.   Morphological feature of CL image of zircon

    图  4   二长花岗斑岩LA–ICP–MS锆石U–Pb年龄谐和图(a)及206Pb/238U加权平均年龄图(b)

    Figure  4.   (a) LA–ICP–MS Zircon U–Pb age Concordia diagram and (b) 206Pb/238U weighted average age for monzonitic granite porphyry

    表  1   高桥沟二长花岗斑岩LA–ICP–MS锆石U–Pb测年数据表

    Table  1   LA–ICP–MS U–Pb dating of the Gaoqiaogou adamellite porphyry

    测点UThTh/U同位素比值同位素年龄(Ma)
    (10−6206Pb*/238U207Pb*/206Pb*207Pb*/235U206Pb/238U207Pb/206Pb
    1114.1194.860.830.131180.002210.061090.001861.104880.02105794.6642.3
    2104.6570.170.670.131840.002230.063540.001931.15470.02093798.4726.3
    366.5951.830.780.129850.002170.063770.001911.141820.02101787.0734.0
    435.3325.030.710.13140.002260.064850.00211.174560.02537795.9769.3
    573.6244.190.600.130180.002170.065870.001941.182310.02068788.9802.2
    656.8441.260.730.133110.002260.066490.002071.22010.02445805.6821.8
    757.642.840.740.131250.002230.066250.002051.198640.02271795.0814.4
    8223.3212.540.950.130480.002180.066210.001951.190940.02055790.6813.0
    938.9927.390.700.129990.002210.066580.002081.193110.02414787.8824.6
    1018.4813.360.720.132080.002280.067320.002221.225570.02755799.7847.7
    1179.2555.640.700.13120.002210.067360.002011.218170.02167794.7849.0
    1274.8743.410.580.130260.002210.067330.002051.208910.02214789.3848.0
    1354.6743.170.790.131660.002240.070010.002171.270610.0246797.3928.8
    1466.1751.870.780.129940.002180.069950.002091.253270.02287787.5926.9
    15105.38109.791.040.130930.00220.070550.002111.273270.02237793.2944.4
    1673.2153.570.730.13130.002220.070930.002151.283770.02376795.3955.4
    1743.4426.110.600.130120.00220.071390.002191.280450.02433788.5968.6
    1836.2420.270.560.132480.002270.072270.002281.319780.02659802.0993.7
    1947.3837.240.790.133110.002290.073230.002341.343780.02865805.61020.2
     注:误差是1σ;Pb*为放射成因铅;应用实测的204Pb进行普通铅校正。
    下载: 导出CSV
  • 陈隽璐,徐学义,曾佐勋,等. 中祁连东段什川杂岩基的岩石化学特征及年代学研究[J]. 岩石学报,2008,24(04):848–850.

    CHEN Junlu, XU xueyi, ZENG Zuoxun, et al. Petrochemistry and geochronology of the Shichuan Complex batholith in the eastern segment of the central Qilian Mountains [J]. Journal of Petrology, 2008, 24(04): 848-850.

    涂怀奎. 汉南杂岩与金成矿特征[J]. 矿产与地质,1991,3(05):164–167.

    TU Huaikui, Hannan complex and gold metallogenic characteristics [ J ]. Minerals and geology, 1991, 3(05): 164-167.

    李昌年. 火山岩微量元素岩石学[M]. 武汉: 中国地质大学出版社, 1992: 74−79

    LI Changnian. Micronutrient[M]. Wuhan: China University of Geosciences Press, 1992: 74−79.

    李章志贤, 郑绍鑫, 张晓琪. 扬子北缘新元古代基性岩体铂族元素特征及找矿意义[J/OL]. 西北地质, 2023: 1−13. doi: 10.12401/j.nwg.2023032

    LI Zhangzhixian, ZHENG Shaoxin, ZHANG Xiaoqi. Characteristics of Platinum Group Element in Neoproterozoic Mafic Intrusions in the Northern Margin of the Yangtze and Exploration Implications[J/OL]. Northwestern Geology, 2023: 1−13. doi: 10.12401/j.nwg.2023032

    陕西省地质调查院. 1∶5万中子铺宁强黎坪幅区域地质调查报告[R]. 陕西省地质调查院, 2013: 140−147.
    陕西省地质调查院. 1∶25万南江市幅区域地质调查报告[R]. 陕西省地质调查院, 2008: 144−163.
    石启慧, 章永梅, 顾雪祥, 等. 山东蓬莱石家金矿床早白垩世镁铁质–长英质脉岩地球化学特征及其成因[J]. 西北地质, 2023, 56(1): 99−116.

    SHI Qihui, ZHANG Yongmei, GU Xuexiang, et al. Geochemical Characteristics and Petrogenesis of the Early Cretaceous Mafic– Felsic Dykes in the Shijia Gold Deposit, Penglai, Shandong Province[J]. Northwestern Geology, 2023, 56(1): 99−116.

    孙巍, 许逢明, 吴大天, 等. 大兴安岭中部扎赉特旗晚三叠世A型花岗岩的发现及其地质意义[J]. 西北地质, 2023, 56(2): 80−91

    SUN Wei, XU Fengming, WU Datian, et al. Discovery and Geological Significance of Late Triassic A–Type Granite in Jalaid Banner, Middle of Great Xing’an Range[J]. Northwestern Geology, 2023, 56(2): 80−91.

    田龙,康磊,刘良,等. 东昆仑巴什尔希晚奥陶世二长花岗岩成因及其地质意义[J]. 西北地质,2023,56(2):28–45.

    TIAN Long, KANG Lei, LIU Liang, et al. Petrogenesis and Geological Implications of Bashenerxi Monzogranite from East Kunlun Orogen Belt[J]. Northwestern Geology, 2023, 56(2): 28 −45.

    俞胜, 贾轩, 徐磊, 等. 西秦岭白龙江地区志留系迭部组岩石地球化学特征及碎屑锆石原位U–Pb年代学研究[J/OL]. 西北地质, 2023: 1−17. doi: 10.12401/j.nwg.2023062

    YU Sheng, JIA Xuan, XU Lei, et al. Geochemistry Characteristics and Detrital Zircon In–site U–Pb Geochronology of Silurian Diebu Formation in Bailongjiang Area, West Qinling Mountains[J/OL]. Northwestern Geology, 2023: 1−17. doi: 10.12401/j.nwg.2023062

图(4)  /  表(1)
计量
  • 文章访问数:  99
  • HTML全文浏览量:  41
  • PDF下载量:  35
  • 被引次数: 0
出版历程
  • 收稿日期:  2021-11-10
  • 修回日期:  2022-08-10
  • 网络出版日期:  2023-01-15
  • 刊出日期:  2023-08-19

目录

    /

    返回文章
    返回