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琼东南盆地中中新统海底扇碎屑岩锆石U-Pb年龄特征及物源分析

龚胜利 闫琢玉 李百强 张铜耀 吴土荣 彭俊峰 郑磊 张东峰 黄向胜 罗程飞 王任

龚胜利, 闫琢玉, 李百强, 张铜耀, 吴土荣, 彭俊峰, 郑磊, 张东峰, 黄向胜, 罗程飞, 王任. 琼东南盆地中中新统海底扇碎屑岩锆石U-Pb年龄特征及物源分析[J]. 地质科技通报, 2024, 43(5): 45-54. doi: 10.19509/j.cnki.dzkq.tb20230534
引用本文: 龚胜利, 闫琢玉, 李百强, 张铜耀, 吴土荣, 彭俊峰, 郑磊, 张东峰, 黄向胜, 罗程飞, 王任. 琼东南盆地中中新统海底扇碎屑岩锆石U-Pb年龄特征及物源分析[J]. 地质科技通报, 2024, 43(5): 45-54. doi: 10.19509/j.cnki.dzkq.tb20230534
GONG Shengli, YAN Zhuoyu, LI Baiqiang, ZHANG Tongyao, WU Turong, PENG Junfeng, ZHENG Lei, ZHANG Dongfeng, HUANG Xiangsheng, LUO Chengfei, WANG Ren. U-Pb age characteristics of detrital zircon and provenance analysis of a Middle Miocene submarine fan in the Qiongdongnan Basin[J]. Bulletin of Geological Science and Technology, 2024, 43(5): 45-54. doi: 10.19509/j.cnki.dzkq.tb20230534
Citation: GONG Shengli, YAN Zhuoyu, LI Baiqiang, ZHANG Tongyao, WU Turong, PENG Junfeng, ZHENG Lei, ZHANG Dongfeng, HUANG Xiangsheng, LUO Chengfei, WANG Ren. U-Pb age characteristics of detrital zircon and provenance analysis of a Middle Miocene submarine fan in the Qiongdongnan Basin[J]. Bulletin of Geological Science and Technology, 2024, 43(5): 45-54. doi: 10.19509/j.cnki.dzkq.tb20230534

琼东南盆地中中新统海底扇碎屑岩锆石U-Pb年龄特征及物源分析

doi: 10.19509/j.cnki.dzkq.tb20230534
基金项目: 

中海石油(中国)有限公司科研项目"琼东南盆地梅山组有效浊积储集体主控因素及储层预测技术" YXKY-ZX 03 2021

安徽理工大学高层次引进人才科研启动基金项目 2023yjrc81

详细信息
    作者简介:

    龚胜利, E-mail: gongshl@cnooc.com.cn

    通讯作者:

    闫琢玉,E-mail:yanzhy3@cnooc.com.cn

  • 中图分类号: P618.51

U-Pb age characteristics of detrital zircon and provenance analysis of a Middle Miocene submarine fan in the Qiongdongnan Basin

More Information
  • 摘要:

    琼东南盆地中中新统海底扇是南海北部天然气勘探的重要目标, 但长期以来对该海底扇沉积物的物源并未达成共识, 因此, 物源分析对于该区天然气勘探有利目标优选具有重要意义。通过钻井取心开展了碎屑锆石U-Pb年龄谱特征研究, 并与周缘潜在物源区锆石U-Pb年龄进行了对比分析, 示踪了研究区中中新统海底扇物源。结果表明: ①盆地北部N-1、N-2、N-3、N-4等4口井碎屑锆石U-Pb年龄表现为燕山期(160, 157, 133, 107, 102, 99 Ma)、印支期(249, 241, 239 Ma)、加里东期(466, 455 Ma)的年龄峰值特征, 且与中国海南岛碎屑锆石U-Pb年龄特征相似度高, 但与红河、越南中部碎屑锆石U-Pb年龄特征相似度低; ②盆地南部S-1、S-2、S-3等3口井碎屑锆石U-Pb年龄特征表现为印支期(242, 238, 237 Ma)、加里东期(435, 431, 425 Ma)、海西期(396, 392 Ma)以及燕山期(143 Ma)的年龄峰值特征, 且S-2井具有较年轻的喜马拉雅期(21 Ma)单峰年龄特征。琼东南盆地北部中中新统沉积物源主要来自海南岛, 红河及越南中部物源对其影响非常有限, 盆地南部中中新统为红河和海南岛双物源供给, 且以红河物源为主, 自西向东差异明显。

     

  • 图 1  琼东南盆地构造分区和新生代地层综合柱状图(据文献[3-4,13,24-31])

    Figure 1.  Tectonic division and Cenozoic stratigraphic column of the Qiongdongnan Basin

    图 2  琼东南盆地中中新统典型碎屑锆石阴极发光(CL)图像

    Figure 2.  Cathodoluminescence(CL) images of typical detrital zircons from the Middle Miocene Qiongdongnan Basin

    图 3  琼东南盆地中央坳陷周缘潜在物源区砂岩样品碎屑锆石U-Pb年龄谱图(据文献[3,10-11,13,38])

    Figure 3.  Detrital zircon U-Pb age spectrum of sandstone sediments from potential provenance areas around the Central Depression of Qiongdongnan Basin

    图 4  琼东南盆地中央坳陷北部典型井砂岩样品碎屑锆石U-Pb年龄谱图

    Figure 4.  Detrital zircon U-Pb age spectrum of the sandstone samples from typical wells in the northern Central Depression of Qiongdongnan Basin

    图 5  琼东南盆地中央坳陷南部典型井砂岩样品碎屑锆石U-Pb年龄谱图

    Figure 5.  Detrital zircon U-Pb age spectrum of the sandstone samples from typical wells in the southern Central Depression of Qiongdongnan Basin

    图 6  琼东南盆地典型井与潜在物源区锆石U-Pb年龄数据相关性分析

    Figure 6.  Correlation analysis of detrital zircon U-Pb age between typical wells and potential source area in the Qiongdongnan Basin

    图 7  琼东南盆地中中新统“源-汇”模式图

    箭头大小表示物源影响程度,箭头越大,反映物源影响越强;虚线为边界线

    Figure 7.  Source-to-sink pattern diagram of the Middle Miocene in the Qiongdongnan Basin

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出版历程
  • 收稿日期:  2023-09-20
  • 录用日期:  2024-01-16
  • 修回日期:  2023-12-13

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