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Geochemistry and petrogenesis of Late Ladinian OIB-like basalts from Tabai, Yunnan Province, China
ZHANG Jiawei; HUANG Zhilong; LUO Taiyi; QIAN Zhikuan; ZHANG Ying
2013
Source PublicationChinese Journal of Geochemistry
Volume32Issue:4Pages:337-346
AbstractMajor and trace elements analysis has been carried out on the Late Ladinian Tabai basalts from Yunnan Province with the aim of studying their petrogenesis. Their SiO2 contents range from 43.63 wt.% to 48.23 wt.%. The basalts belong to the weakly alkaline(average total alkalis Na2 O+K2O=3.59 wt.%), high-Ti(3.21 wt.% to 4.32 wt.%) magma series. The basalts are characterized by OIB-like trace elements patterns, which are enriched in large ion lithosphile elements(LILE) including Rb and Ba, and display negative K, Zr and Hf anomalies as shown on the spider diagrams. The Tabai basalts display light rare-earth elements(LREE) enrichment and are depleted in heavy rare-earth elements(HREE) on the REE pattern. Those dates indicate that the parental magma of the Tabai basalts was derived from low-degree(1%–5%) partial melting of garnet peridotite. The magma underwent olivine fractional crystallization and minor crustal contamination during their ascent. The Tabai basalts were related to a relaxation event which had triggered the Emeishan fossil plume head re-melting in the Middle Triassic.
Subject Area矿床地球化学
Indexed ByEI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/7119
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
Recommended Citation
GB/T 7714
ZHANG Jiawei,HUANG Zhilong,LUO Taiyi,et al. Geochemistry and petrogenesis of Late Ladinian OIB-like basalts from Tabai, Yunnan Province, China[J]. Chinese Journal of Geochemistry,2013,32(4):337-346.
APA ZHANG Jiawei,HUANG Zhilong,LUO Taiyi,QIAN Zhikuan,&ZHANG Ying.(2013).Geochemistry and petrogenesis of Late Ladinian OIB-like basalts from Tabai, Yunnan Province, China.Chinese Journal of Geochemistry,32(4),337-346.
MLA ZHANG Jiawei,et al."Geochemistry and petrogenesis of Late Ladinian OIB-like basalts from Tabai, Yunnan Province, China".Chinese Journal of Geochemistry 32.4(2013):337-346.
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