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Geochemical characteristics and geological significance of Cretaceous phonotephrite from the Mid-Pacific Mountains

文献类型：期刊论文

作者Chen, Shuangshuang1,2,3; Liu, Jiaqi1,3
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2018-06-01
卷号61期号:6页码:745-764
关键词Phonotephrite OIB-type mantle source Carbonatite metasomatism Line Islands Mid-Pacific Mountain
ISSN号1674-7313
DOI10.1007/s11430-017-9172-4
文献子类Article
英文摘要Systematic analyses were conducted including the petrographic features, major and trace elements, Sr and Nd isotopic compositions, and mineral structure and compositions of whole rocks. Mid-Pacific Mountain volcanic rocks are mainly phonotephrite with a porphyritic texture. Phenocrysts are mainly composed of Ca-rich plagioclase, clinopyroxene and nepheline. These volcanic rocks are significantly rich in large-ion lithophile and light rare earth elements, without obvious Eu anomalies (delta Eu=0.99-1.03), and with relatively enriched Sr-87/Sr-86 (0.703829-0.704313) and Nd-143/Nd-144 isotopic ratios (0.512857-0.512871), suggesting that they have similar but more enriched features than the OIB magmatic source. These volcanic rocks may originate from relatively deep magma source with the existence of spinel-garnet Iherzolites, and have undergone partial melting at a low degree of 1-3%. In addition, The residual Nb-Ta minerals (such as sphene, rutile, perovskite) may remain in the mantle source, and the magma components have undergone metasomatism by carbonate melt/fluid or alkali-rich fluid, causing high contents of incompatible elements and significant loss of Nb, Ta and Ti in these volcanic rocks. There are many similarities between the phonotephrites in the Mid-Pacific Mountain and the volcanic rocks in the Line Islands based on the tectonic settings and the geochemical characteristics. We thus speculate that Site 313 volcanic rocks in the Mid-Pacific Mountain is most likely to be a continuation of the Line Islands.
WOS关键词ONTONG JAVA PLATEAU ; IONIZATION MASS-SPECTROMETRY ; SPINEL PERIDOTITE XENOLITHS ; SHATSKY RISE ; CARBONATED PERIDOTITE ; UPPER-MANTLE ; SEPARATION SCHEME ; CONVECTION PLUMES ; TRIPLE JUNCTION ; SOLOMON-ISLANDS
WOS研究方向Geology
语种英语
WOS记录号WOS:000434489400008
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; National Natural Science Foundation of China(41476034 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 41272369 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 40802038 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41320104006 ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102) ; 41302102)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88249]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Liu, Jiaqi
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Shuangshuang,Liu, Jiaqi. Geochemical characteristics and geological significance of Cretaceous phonotephrite from the Mid-Pacific Mountains[J]. SCIENCE CHINA-EARTH SCIENCES,2018,61(6):745-764.
APA Chen, Shuangshuang,&Liu, Jiaqi.(2018).Geochemical characteristics and geological significance of Cretaceous phonotephrite from the Mid-Pacific Mountains.SCIENCE CHINA-EARTH SCIENCES,61(6),745-764.
MLA Chen, Shuangshuang,et al."Geochemical characteristics and geological significance of Cretaceous phonotephrite from the Mid-Pacific Mountains".SCIENCE CHINA-EARTH SCIENCES 61.6(2018):745-764.

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来源：地质与地球物理研究所

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