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Received: 2003-09-30
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LI Zi-long, CHEN Han-lin, YANG Shu-feng, DONG Chuan-wan, XIAO Wen-jiao. Petrology, geochemistry and geodynamics of basic granulite from the Altay area, North Xinjiang, China[J]. Journal of Zhejiang University Science A, 2004, 5(8): 979-984.
@article{title="Petrology, geochemistry and geodynamics of basic granulite from the Altay area, North Xinjiang, China",
author="LI Zi-long, CHEN Han-lin, YANG Shu-feng, DONG Chuan-wan, XIAO Wen-jiao",
journal="Journal of Zhejiang University Science A",
volume="5",
number="8",
pages="979-984",
year="2004",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2004.0979"
}
%0 Journal Article
%T Petrology, geochemistry and geodynamics of basic granulite from the Altay area, North Xinjiang, China
%A LI Zi-long
%A CHEN Han-lin
%A YANG Shu-feng
%A DONG Chuan-wan
%A XIAO Wen-jiao
%J Journal of Zhejiang University SCIENCE A
%V 5
%N 8
%P 979-984
%@ 1869-1951
%D 2004
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2004.0979
TY - JOUR
T1 - Petrology, geochemistry and geodynamics of basic granulite from the Altay area, North Xinjiang, China
A1 - LI Zi-long
A1 - CHEN Han-lin
A1 - YANG Shu-feng
A1 - DONG Chuan-wan
A1 - XIAO Wen-jiao
J0 - Journal of Zhejiang University Science A
VL - 5
IS - 8
SP - 979
EP - 984
%@ 1869-1951
Y1 - 2004
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2004.0979
Abstract: The basic granulite of the altay orogenic belt occurs as tectonic lens in the Devonian medium- to lower-grade metamorphic beds through fault contact. The Altay granulite (AG) is an amphibole plagioclase two-pyroxene granulite and is mainly composed of two pyroxenes, plagioclase, amphibole and biotite. Its melano-minerals are rich in Mg/(Mg+Fe2+), and its amphibole and biotite are rich in TiO2. The AG is rich in Mg/(Mg+Fe2+), Al2O3 and depletion of U, Th and Rb contents. The AG has moderate ∑REE and LREE-enriched with weak positive Eu anomaly. The AG shows island-arc pattern with negative Nb, P and Ti anomalies, reflecting that formation of the AG may be associated with subduction. Geochemical and mineral composition data reflect that the protolith of the AG is calc-alkaline basalt and formed by granulite facies metamorphism having peak P-T conditions of 750 °C-780 °C and 0.6-0.7 Gpa. The AG formation underwent two stages was suggested. In the early stage of oceanic crustal subduction, calc-alkaline basalt with island-arc environment underwent granulite facies metamorphism to form the AG in deep crust, and in the late stage, the AG was thrust into the upper crust.
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