NDLI: Geochemical characteristics and petrogenesis of Permian basaltic rocks in Keping area, Western Tarim basin: A record of plume-lithosphere interaction

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Journal of Earth Science : Volume 23, Issue 3, June 2012

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Journal of Earth Science : Volume 23, Issue 1, February 2012

Journal of Earth Science : Volume 22

Journal of Earth Science : Volume 21

Journal of Earth Science : Volume 20

Geochemical characteristics and petrogenesis of Permian basaltic rocks in Keping area, Western Tarim basin: A record of plume-lithosphere interaction

Content Provider	Springer Nature Link
Author	Yu, Junchuan Mo, Xuanxue Yu, Xuehui Dong, Guochen Fu, Qiang Xing, Fengcun
Copyright Year	2012
Abstract	The two basalt flows in Kupukuziman (库普库兹满) Formation of Keping (柯坪) area are the typical products of Permian magmatism. Based on systematic field investigations, we carried out geochemical studies on representative Keping basalts. The results show that the SiO$_{2}$ contents in basalts range from 44.69 wt.% to 51.68 wt.%, and the total alkalis range from 4.05 wt.% to 5.5 wt.%, belonging belonging to alkaline basalts. The Ti/Y=468.27–565.35 and TiO$_{2}$=(2.88–3.82) wt.% compared to those of the high-Ti basalts in Emeishan (峨眉山) large igneous province (LIP) (TiO$_{2}$=(3.58–5.21) wt.%, Ti/Y>500, Xiao et al., 2004). The contents of MgO and compatible elements Cr (12.9–18.6 ppm), Ni (13.7–22.7 ppm), and Co (39.6–50.2 ppm) are low, which suggest that the samples have undergone varying grades of fractional crystallization. All the samples have uniform REE and other trace element characteristics, with enriched LREE and LILE relative to HREE and HFS, similar REE patterns without Eu anomaly. The basalts are also show slightly depleted of Ta and Nb. They have higher initial $^{87}$Sr/$^{86}$Sr ratios (0.707 211–0.708 300), lower ɛ $_{Nd}$(t) values (−2.47 to −4.14), and a narrow range of ($^{208}$Pb/$^{204}$Pb)$_{t}$=37.535 2–38.297 7, ($^{207}$Pb/$^{204}$Pb)$_{t}$=15.435 7–15.517 0, and ($^{206}$Pb/$^{204}$Pb)$_{t}$=17.206 5–17.874 7 ratios. The Ce/Y versus Zr/Nb diagram shows that the parent magmas were originated from low-degree partial melting of the garnet-lherzolite. The analysis results based on geochemical studies seem all point to the same conclusion that the Keping basalts have formed as a product of the interaction between the plume-derived melts and the lithosphere.
Starting Page	442
Ending Page	454
Page Count	13
File Format	PDF
ISSN	1674487X
Journal	Journal of Earth Science
Volume Number	23
Issue Number	4
e-ISSN	1867111X
Language	English
Publisher	China University of Geosciences
Publisher Date	2012-08-02
Publisher Place	China University of Geosciences
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tarim basin Permian large igneous province mantle plume geochemical characteristics Earth Sciences Geology Geochemistry Geotechnical Engineering & Applied Earth Sciences Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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