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

doi:10.1007/s11430-017-9172-4

CORC > 地质与地球物理研究所 > 中国科学院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

	Geochemical characteristics and geological significance of Cretaceous phonotephrite from the Mid-Pacific Mountains
	Chen, Shuangshuang 1,2,3; Liu, Jiaqi 1,3
刊名	SCIENCE CHINA-EARTH SCIENCES
	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
DOI	10.1007/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
出版者	SCIENCE PRESS
WOS记录号	WOS:000434489400008
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)
内容类型	期刊论文
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.