大陆溢流玄武岩的地球化学特征及起源

张鸿翔; 徐志方; 马英军; 刘丛强

Volume 26 Issue 3

May 2001

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ZHANG Hongxiang, XU Zhifang, MA Yingjun, LIU Congqiang, 2001. GEOCHEMICAL FEATURES AND ORIGIN OF CONTINENTAL FLOOD BASALTS. Earth Science, 26(3): 261-268.

Citation:

ZHANG Hongxiang, XU Zhifang, MA Yingjun, LIU Congqiang, 2001. GEOCHEMICAL FEATURES AND ORIGIN OF CONTINENTAL FLOOD BASALTS. Earth Science, 26(3): 261-268.

ZHANG Hongxiang, XU Zhifang, MA Yingjun, LIU Congqiang, 2001. GEOCHEMICAL FEATURES AND ORIGIN OF CONTINENTAL FLOOD BASALTS. Earth Science, 26(3): 261-268.

Citation:

ZHANG Hongxiang, XU Zhifang, MA Yingjun, LIU Congqiang, 2001. GEOCHEMICAL FEATURES AND ORIGIN OF CONTINENTAL FLOOD BASALTS. Earth Science, 26(3): 261-268.

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GEOCHEMICAL FEATURES AND ORIGIN OF CONTINENTAL FLOOD BASALTS

Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China

Received Date: 2000-12-12
Publish Date: 2001-05-25

Abstract

Abstract

A close genetic relationship is present between the rapidly upwelling continental flood basalts(CFB)and the continent rift. On the whole, the petrologic and geochemical compositions are homogeneous and enriched with isotopes and incompatible trace elements. However, some samples contain conspicuous depleted compositions, reflecting a general mantle heterogeneity. The mantle plume originating from upper/lower mantle boundary or asthenosphere might have served as the major materials and energies required for CFB that has not been fully assimilated by the crust. The metasomatism between the dehydrated fluid in the subduction zone or the thermal mantle plume itself and its wall rocks determines that the metasomatic lithosphere mantle with a great effect on the formation of CFB, is a major cause of the trace elements and isotope characteristics of CFB.
- continental flood basalt(CFB),
- continent rift,
- continent lithosphere mantle(CLM),
- mantle plume,
- metasomatism

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References(33)

References

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