NDLI: Sr, Nd isotope geochemistry of volcanic rock series and its geological significance in the middle Okinawa Trough

Content Provider	Springer Nature Link
Author	Meng, Xianwei Chen, Zhihua Du, Dewen Wu, Jinlong
Copyright Year	2000
Abstract	There exists extensive basic-acidic volcanic rock series in the middle section of the Okinawa Trough. Different types of these volcanic rocks have their own average strontium ratios of 0.704 749, 0.705 062, 0.708 771, 0.704 840 and 0.720 301 with average$^{143}$Nd/$^{144}$Nd ratios of 0.512 820, 0.512 673, 0.512 413, 0.512 729 and 0.512 034. These ratios of Sr and Nd isotopes all fall on a theoretic hyperbolic curve of mixing between two end-members of MORB and rhyolitic magma. So we infer that these different kinds of volcanic rocks in the middle Okinawa Trough are the erupted product in different stages of formation and evolution of the trough crust. MORB magma, which had suffered assimilation, mixed with the early-formed crust-derived rhyolitic partial melt mass at different ratios; then, these mixed magma erupted and formed volcanic rock types of the trough. This study indicates that the Okinawa Trough is coming into a stage of submarine spreading from the stage of continental rift.
Starting Page	458
Ending Page	463
Page Count	6
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	43
Issue Number	5
e-ISSN	18622801
Language	English
Publisher	Science in China Press
Publisher Date	2000-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	Okinawa Trough volcanic rocks Sr and Nd isotopes Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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