东昆仑卡而却卡铜多金属矿床似斑状二长花岗岩锆石U-Pb年龄及其地质意义

张勇, 张大明, 刘国燕, 李泽峰, 赵永亮, 李恒恒, 王生明. 东昆仑卡而却卡铜多金属矿床似斑状二长花岗岩锆石U-Pb年龄及其地质意义[J]. 地质通报, 2017, 36(2-3): 270-274.
引用本文: 张勇, 张大明, 刘国燕, 李泽峰, 赵永亮, 李恒恒, 王生明. 东昆仑卡而却卡铜多金属矿床似斑状二长花岗岩锆石U-Pb年龄及其地质意义[J]. 地质通报, 2017, 36(2-3): 270-274.
ZHANG Yong, ZHANG Daming, LIU Guoyan, LI Zefeng, ZHAO Yongliang, LI Hengheng, WANG Shengming. Zircon U-Pb dating of porphyroid monzonitic granite in the Kaerqueka copper polymetallic deposit of East Kunlun Mountains and its geological significance[J]. Geological Bulletin of China, 2017, 36(2-3): 270-274.
Citation: ZHANG Yong, ZHANG Daming, LIU Guoyan, LI Zefeng, ZHAO Yongliang, LI Hengheng, WANG Shengming. Zircon U-Pb dating of porphyroid monzonitic granite in the Kaerqueka copper polymetallic deposit of East Kunlun Mountains and its geological significance[J]. Geological Bulletin of China, 2017, 36(2-3): 270-274.

东昆仑卡而却卡铜多金属矿床似斑状二长花岗岩锆石U-Pb年龄及其地质意义

  • 基金项目:
    国土资源部项目《青海省祁漫塔格整装勘查区关键科学技术难题研究与示范》(编号:201411025)和《柴达木盆地南北缘成矿系统与勘查开发示范》(编号:2016-SF-A3)
详细信息
    作者简介: 张勇 (1982-), 男, 硕士, 高级工程师, 从事地质矿产勘探工作。E-mail:qhskyzy@163.com
  • 中图分类号: P618.41;P588.12+1

Zircon U-Pb dating of porphyroid monzonitic granite in the Kaerqueka copper polymetallic deposit of East Kunlun Mountains and its geological significance

  • 卡而却卡铜多金属矿床位于东昆仑成矿带西段,具有斑岩型-矽卡岩型-热液型系列成矿的特征,成矿元素以Cu、Mo、Pb、Zn为主,共生、伴生有Fe、Au、Ag、W、Sn。采用LA-ICP-MS同位素测定技术,测得与斑岩型成矿关系密切的似斑状二长花岗岩中锆石的206Pb/238U年龄为226.5±0.5Ma(MSWD=1.05,n=25),表明似斑状二长花岗岩形成于晚三叠世,属印支期岩浆活动的产物。

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  • 图 1  卡而却卡铜钼多金属矿区地质简图(据参考文献[3-5]修改)

    Figure 1. 

    图 2  卡而却卡铜多金属矿床似斑状二长花岗岩显微照片

    Figure 2. 

    图 3  似斑状二长花岗岩(2012KA1)锆石阴极发光 (CL)图像与206Pb/238U年龄

    Figure 3. 

    图 4  似斑状二长花岗岩(2012KA1)锆石U-Pb谐和图(a)及206Pb/238U年龄图(b)

    Figure 4. 

    表 1  卡而却卡似斑状二长花岗岩LA-ICP-MS锆石U-Th-Pb同位素数据

    Table 1.  LA-ICP-MS U-Th-Pb isotopic analyses of zircon from porphyroid monzonitic granite in the Kaerqueka ore district

    样品
    2012KA1
    含量/10-6同位素比值年龄/Ma
    PbU206Pb/238U207Pb/235U207Pb/206Pb208Pb/232Th232Th/238U206Pb/238U207Pb/235U207Pb/206Pb
    1348370.035900.000220.25090.00970.050690.00170.013960.000390.67640.00252271227922779
    24511540.036270.000200.25220.00550.050430.00110.013370.000260.49910.000342301228521548
    3349170.035660.000200.24980.00520.050790.00110.010910.000170.51020.000442261226523248
    46617940.035730.000210.24930.00700.050600.00130.014360.000430.36130.000542261226622258
    5349050.035740.000200.24900.00540.050530.00110.010610.000140.59890.00132261226521950
    64611970.035610.000200.25000.00570.050910.00120.012930.000220.53050.000502261227523749
    75613890.036510.000200.25200.00540.050070.000980.012920.000200.63410.00122311228519846
    85013210.035770.000190.25040.00390.050780.000790.010260.000120.55980.00132271227423136
    9297540.035730.000190.24900.00520.050560.00100.011060.000160.56940.00282261226522147
    1010127580.035510.000220.24860.00230.050770.000480.009870.0000160.50580.00542251225223122
    11369740.035690.000200.24910.00320.050620.000670.010450.0000740.54520.00132261226322331
    124211390.035700.000200.24960.00260.050710.000530.009100.0000250.59170.000332261226222724
    134411790.035870.000190.24930.00280.050410.000570.009080.0000420.57000.00132271226321426
    149725390.035640.000220.24900.00260.050670.000540.008810.0000150.75220.00612261226222624
    1582010.035720.000220.24970.00960.050700.00190.009250.0000581.18360.00232261226922787
    164712670.035610.000200.24870.00270.050650.000540.009400.0000200.57410.00142261226222524
    17235970.035650.000230.24990.0110.050830.00220.008000.000190.81560.0044226122610233102
    1812032650.035720.000260.25010.00290.050780.000690.009540.000100.51510.00612262227323131
    195213690.035700.000270.24980.00410.050760.000610.009140.0000870.66440.00622262226423028
    204611380.035650.000190.25030.00350.050920.000700.009560.0000530.93270.00582261227323732
    216516980.035710.000200.24970.00370.050720.000740.010930.000130.58210.00412261226322834
    22389990.035810.000240.25140.00470.050920.00100.011560.000170.54460.00372272228423747
    23338980.035710.000200.24880.00300.050530.000600.009600.0000340.46580.000822261226322028
    245213400.035760.000200.25180.00270.051060.000530.010610.0000200.70740.00122271228224324
    255514430.035610.000210.25080.00270.051070.000510.010170.0000330.60760.00232261227224423
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出版历程
收稿日期:  2015-02-12
修回日期:  2015-07-01
刊出日期:  2017-03-25

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