南海北部陆缘新生代玄武岩地球化学特征及成因
作者:
基金项目:

本文为南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(编号GML2019ZD0201)、国家自然科学基金项目(编号92062215,42172069,41720104009)、青藏高原第二次科学考察专项(编号2019QZKK0801)、自然资源部深地动力学重点实验室自主研究课题(编号J1901- 28)和中国地质调查局项目(编号DD20221817,DD20221630)联合资助的成果。


Geochemical characteristics and petrogenesis of Cenozoic basalt from the northern continental margin of the South China Sea
Author:
  • Cao Chuqi

    Cao Chuqi

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Xiong Fahui

    Xiong Fahui

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Yang Shengbiao

    Yang Shengbiao

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Xu Xiangzhen

    Xu Xiangzhen

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Liu Fei

    Liu Fei

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Niu Xiaolu

    Niu Xiaolu

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Feng Guangying

    Feng Guangying

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Qiu Tian

    Qiu Tian

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China;3) School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • Yang Jingsui

    Yang Jingsui

    1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458,China; 2) Center for Advanced Research on the Mantle (CARMA), Key Laboratory of Deep- Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China
    在期刊界中查找
    在百度中查找
    在本站中查找
  • 摘要
  • | |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • | |
  • 文章评论
    摘要:

    南海盆地及周缘地区新生代玄武岩对揭示南海盆地的演化历史至关重要,然而这些玄武岩的成因还存在争议。本文研究了位于南海北部陆缘的海南岛临高县多文组玄武岩岩石地球化学和矿物地球化学特征,并探讨其成因和构造背景。多文组玄武岩主要由橄榄石、单斜辉石、斜长石、斜方辉石、铬尖晶石和铁钛氧化物等组成。橄榄石Fo值变化于55. 5~71. 1之间,Ni的含量较低, Fe/Mn比值较高。铬尖晶石Cr#值为74. 1~82. 7,Mg#值为45. 5~63. 8, Ti的含量较高。斜方辉石Mg#值为63. 9~79. 6,单斜辉石为66. 0~80. 6。单斜辉石稀土配分曲线富集MREE,亏损LREE和HREE,呈拱形分布。斜长石以中- 拉长石为主(Ab36. 56~52. 78), 富集LREE、Ba、Sr和Eu。铁钛氧化物的TiO2含量为50. 19%~51. 46%。多文组玄武岩原始岩浆的主量和微量元素组成与夏威夷、峨眉山、塔里木等玄武岩组成一致,地幔源区包含了辉石岩的成分,而且其地幔潜在温度(>1400℃)和氧逸度(ΔNNO)要高于大洋中脊玄武岩(N- MORB),表明多文组玄武岩的形成与海南地幔柱活动有关。由于海南地幔柱形成时代明显晚于南海盆地的扩张时代,认为南海地幔柱是南海盆地伸展的被动响应。

    Abstract:

    The Cenozoic basalts in the South China Sea basin and surrounding areas are crucial to revealing the evolutionary history of the South China Sea basin. Yet, the genesis of these basalts is still debated. This paperdetermined the mineralogy petrology and geochemistry of the Cenozoic basalt from the Duowen Formation in Fushan Town, Lingao County, northern Hainan Island to discuss their genesis and tectonic setting. The basalts from the Duowen Formation are mainly composed of olivine, clinopyroxene, plagioclase, orthopyroxene, Cr- spinel and Fe- Ti oxides, etc. The Fo values of olivine vary from 55. 5 to 71. 1, with a low Ni content and a high Fe/Mn ratio. The Cr# values of Cr- spinel range from 74. 1 to 82. 7, Mg# values from 45. 5 to 63. 8, with a high Ti content. The Mg# values of orthopyroxene range from 63. 9 to 79. 6, and the clinopyroxene values between 66. 0 to 80. 6. Chondrite- normalized REE patterns of clinopyroxene are enriched in MREE and depleted in LREE and HREE, with an arch- shaped distribution. The plagioclase is dominated by andesine and labradorite (Ab 36. 56~52. 78), enriched in LREE, Ba, Sr and Eu. The TiO2 content of Fe- Ti oxides is 50. 19%~51. 46%. The main and trace element compositions of the primary magma of the basalts from the Duowen Formation are consistent with those of the basalts of Hawaii, Emeishan and Tarim, while their mantle source contains pyroxenite compositions, and its potential mantle temperature (>1400℃) and oxygen fugacity (ΔNNO) are higher than those of the mid- ocean ridge basalts (N- MORB), suggesting that the formation of the basalts of the Duowen Formation is related to the activity of the Hainan mantle plume. As the formation age of the Hainan mantle plume is significantly later than the expansion age of the South China Sea basin, it is considered that the South China Sea mantle plume is a passive response to the extension of the South China Sea basin.

    参考文献
    相似文献
    引证文献
引用本文

曹楚奇,熊发挥,杨胜标,徐向珍,刘飞,牛晓露,冯光英,邱添,杨经绥.2022.南海北部陆缘新生代玄武岩地球化学特征及成因[J].地质学报,96(8):2683-2704.
Cao Chuqi, Xiong Fahui, Yang Shengbiao, Xu Xiangzhen, Liu Fei, Niu Xiaolu, Feng Guangying, Qiu Tian, Yang Jingsui.2022. Geochemical characteristics and petrogenesis of Cenozoic basalt from the northern continental margin of the South China Sea[J]. Acta Geologica Sinica,96(8):2683-2704.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-06-01
  • 最后修改日期:2022-06-21
  • 在线发布日期: 2022-07-11