菲律宾马尼拉新生代火山岩的Sr-Nd-Pb-Ca同位素特征:对南海俯冲过程中深部碳循环的制约

被引:3
作者
马东东 [1 ,2 ]
刘芳 [1 ,2 ]
祝红丽 [1 ]
张兆峰 [1 ]
邓江洪 [3 ,4 ]
机构
[1] 中国科学院广州地球化学研究所同位素地球化学国家重点实验室
[2] 中国科学院大学
[3] 中国科学技术大学中国科学院壳幔物质与环境重点实验室
[4] 中国科学院海洋研究所深海研究中心
基金
中国博士后科学基金;
关键词
岛弧火山岩; Sr-Nd-Pb-Ca同位素组成; 深部碳循环; 马尼拉;
D O I
10.19700/j.0379-1726.2018.06.001
中图分类号
P588.14 [喷出岩(火山岩)]; P534.6 [新生代(界)]; P597 [同位素地质学与地质年代学];
学科分类号
070901 ; 070903 ; 070902 ;
摘要
对菲律宾马尼拉新生代高钾钙碱性岛弧火山岩的主元素、微量元素和Sr-Nd-Pb-Ca同位素组成进行了研究,探讨了其源区组成并尝试示踪深部碳循环这一全球碳循环的重要组成部分。研究表明,马尼拉火山岩具有以下地球化学特征:(1)富集轻稀土元素(LREE)和大离子亲石元素(LILE),亏损高场强元素(HFSE,如Nb, Ta和Ti等),具岛弧火山岩的地球化学特征;(2)高207Pb/204Pb和208Pb/204Pb比值,暗示其源区有陆源沉积物的加入;(3)δ44/40Ca从0.70‰变化至0.85‰,平均值是0.74‰±0.03‰(2σ,n=8),低于原始地幔值(0.94‰±0.05‰)。这些特征暗示其源区中可能加入了低δ44/40Ca组成的海相沉积碳酸盐岩。二端元模拟计算结果显示:其源区中加入了约4%~5%的海相沉积碳盐岩。结合区域构造背景,认为该火山岩可能是上覆欧亚大陆陆源沉积物和海洋沉积碳酸盐岩的南海板块沿马尼拉海沟俯冲过程中交代上覆地幔楔,使得地幔楔发生部分熔融的产物。
引用
收藏
页码:593 / 603
页数:11
相关论文
共 35 条
[11]  
Early Cretaceous high-Mg adakites associated with Cu-Au mineralization in the Cebu Island, Central Philippines: Implication for partial melting of the paleo-Pacific Plate[J] . Jianghong Deng,Xiaoyong Yang,Huasheng Qi,Zhao-feng Zhang,Abdul Shakoor Mastoi,Weidong Sun.Ore Geology Reviews . 2017
[12]  
Coupled Extremely Light Ca and Fe Isotopes in Peridotites[J] . Xinmiao Zhao,Zhaofeng Zhang,Shichun Huang,Yufei Liu,Xin Li,Hongfu Zhang.Geochimica et Cosmochimica Acta . 2017
[13]  
Calcium isotopic composition of mantle xenoliths and minerals from Eastern China[J] . Jin-Ting Kang,Hong-Li Zhu,Yu-Fei Liu,Fang Liu,Fei Wu,Yan-Tao Hao,Xia-Chen Zhi,Zhao-Feng Zhang,Fang Huang.Geochimica et Cosmochimica Acta . 2016
[14]   Calcium Isotopic Fractionation during Ion-Exchange Column Chemistry and Thermal Ionisation Mass Spectrometry (TIMS) Determination [J].
Zhu, Hong L. ;
Zhang, Zhao F. ;
Wang, Gui Q. ;
Liu, Yu F. ;
Liu, Fang ;
Li, Xin ;
Sun, Wei D. .
GEOSTANDARDS AND GEOANALYTICAL RESEARCH, 2016, 40 (02) :185-194
[15]  
Early Cretaceous arc volcanic suite in Cebu Island, Central Philippines and its implications on paleo-Pacific plate subduction: Constraints from geochemistry, zircon U–Pb geochronology and Lu–Hf isotopes[J] . Jianghong Deng,Xiaoyong Yang,Zhao-Feng Zhang,M. Santosh.LITHOS . 2015
[16]  
Neoarchaean felsic volcanic rocks from the Shimoga greenstone belt, Dharwar Craton, India: Geochemical fingerprints of crustal growth at an active continental margin[J] . C. Manikyamba,Abhishek Saha,M. Santosh,Sohini Ganguly,M. Rajanikanta Singh,D.V. Subba Rao,M. Lingadevaru.Precambrian Research . 2014
[17]  
First-principles investigations of equilibrium calcium isotope fractionation between clinopyroxene and Ca-doped orthopyroxene[J] . Chongqin Feng,Tian Qin,Shichun Huang,Zhongqing Wu,Fang Huang.Geochimica et Cosmochimica Acta . 2014
[18]  
Magnesium isotopic systematics of continental basalts from the North China craton: Implications for tracing subducted carbonate in the mantle[J] . Wei Yang,Fang-Zhen Teng,Hong-Fu Zhang,Shu-Guang Li.Chemical Geology . 2012
[19]  
Stable calcium isotopic compositions of Hawaiian shield lavas: Evidence for recycling of ancient marine carbonates into the mantle[J] . Geochimica et Cosmochimica Acta . 2011 (17)
[20]  
The deep carbon cycle and melting in Earth’s interior[J] . Rajdeep Dasgupta,Marc M. Hirschmann.Earth and Planetary Science Letters . 2010 (1)