|Table of Contents|

Petrological Characteristic of the Huangyangshan Intrusion in Kalamaili Area, East Junggar, Xinjiang(PDF)

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

Issue:
2009年第01期
Page:
34-41
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Petrological Characteristic of the Huangyangshan Intrusion in Kalamaili Area, East Junggar, Xinjiang
Author(s):
YANG Gao-xue1;  LI Yong-jun1;  SI Guo-hui1;  WU Hong-en2;  ZHANG Yong-zhi2;  JIN Zhao1
(1.School of Earth Sciences and Resources, Chang'an University, Xi'an 710054, Shaanxi, China; 2.Xinjiang Institute of Geological Exploration for Nonferrous Resources, Urumqi 830000, Xinjiang, China)
Keywords:
petrological characteristic;  enclaves;  magma mixing;  Huangyangshan intrusion;  East Junggar
PACS:
P581
DOI:
-
Abstract:
Based on predecessor's research work, new understanding about Huangyangshan intrusion has been got. Sabei and Sujiquan granites are only parts of the Huangyangshan intrusion, but not the single intrusion. The host rock of Huangyangshan intrusion may be divided into 6 units, that is, medium-grain biotite alkali-feldspar granite,medium-grain amphibole alkali-feldspar granite, medium-grain arfvedsonite alkali-feldspar granite, medium-fine grain arfvedsonite alkali-feldspar granite, fine grain biotite alkali-feldspar granite and fine-grain mixing granite(including graphite). Petrological and mineralogical Characteristics show that the rock evolution presents the tendency from biotite alkali-feldspar granite to arfvedsonite alkali-feldspar granite that may belong to alkali granite(A-type granite)produced by remelting differentiation from mantle magma, which is powerfully evidenced by the existence of microgranular dioritic enclaves,massive dioritic(porphyrite)dike and diabase(porphyrite)dike. It is thought that the emplacement of Huangyangshan intrusion took place in post-collision environment and is related with the Kalamaili fault. The formation and evolution of both enclaves and host granites in Junggar region prove that the process of vertical growth of continental crust resulted from the post-collision mantle-derived magmas and differentiation product in late Paleozoic.

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Last Update: 2009-03-20