青藏高原北羌塘新生代高钾钙碱岩系火山岩角闪石类型及痕量元素地球化学

Translated title of the contribution: Trace element geochemistry and classification of the amphiboles of the Cenozoic high-potassium calc-alkaline volcanic rock series from north Qiangtang, Qinghai-Tibetan plateau

Shao Cong Lai*, Hai Sheng Yi, Chi Yang Liu, Suzanne Y. O'Reilly

*Corresponding author for this work

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Based on the electron microprobe and laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS) analyses, the major and trace element features of amphibole from the Cenozoic high-potassium calc-alkaline dacite of north Qiangtang are discussed in this paper. The result indicates that all of the amphiboles belong to calcic series. Their major elements imply that the dacite should be of crustal origin. And the amphiboles show the Sc, Ti, V, Cr, Co, Ni enrichment and the Th, U, Pb, Rb depletion. Especially, the amphiboles exhibit high content in rare earth element but no remarkable Eu depletion. It may imply that the Cenozoic high-potassium calc-alkaline volcanic rocks from north Qiangtang might be originated from the thickened eclogitic deep crust of Tibetan plateau by dehydration partial melting.

    Original languageChinese
    Pages (from-to)17-24
    Number of pages8
    JournalActa Petrologica Sinica
    Volume18
    Issue number1
    Publication statusPublished - 2002

    Keywords

    • Amphibole
    • Geochemistry
    • Major and trace element
    • North Qiangtang
    • Qinghai-Tibetan plateau

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