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Petrology fetures and magma mingling marks of the Wenquan granite from western Qinling(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2004年第03期
Page:
7-12
Research Field:
Publishing date:

Info

Title:
Petrology fetures and magma mingling marks of the Wenquan granite from western Qinling
Author(s):
LI Yong-junLI Zhu-cangDING San-pingLIU Zhi-wuLI Min-xianLI Jin-bao
School of Earth Science and Resources Management , Chang' an University , Xi' an 710054 , China
Keywords:
petrology featuresmafic microgranular enclave mingling of magma Wenquan granite western Qinling
PACS:
P588.1
DOI:
-
Abstract:
Wenquan granite is composed of two end-member rocks , one is the host rock of the acid end-member , and the other is the microgranular mafic enclave .In the area without magma mingling or with weak magma mingling , the host rock is dominated by porphyaceous adamellite showing normal granite fabric .However , in the area with strong magma mingling , there are widespread abnormal fabrics, distinguished differences in the idiomophic-textures and the peritectic reaction, poililitic texture , metasomatism among the minerals , metasomatic border , embayment, rimmed structure , abnormal plagioclase zoning , relict fabric as well as the acicular apatite are very common.There are a lot of capture crystals in the rock of basic end-member .The shapes and fabric of the inclusion, as well as the strong exchange of the chemical compositions between the enclave and the host rock indicate the magma mingling .

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Last Update: 2004-09-20