Geochemistrical Features of Laojunshan Granite and its Evolution in East-South Yunnan, China

Abstract:

Laojunshan granite is located in east-south Yunnan. Study on the geology, petrochemistry, microelement and rare earth elements of the Laojunshan granite indicates that the Laojunshan granite is a complex granite, which is divided into three epoch and various metasomatism within the granite is visible. The content of titanium, iron, magnesium is low and the content of silicon, aluminium, potassium is high in the granite, reflecting the granite is a granite of saturated-aluminium series and speculating mother rock of the granite is mud, psammitic rock. Formation of the granite is related with geological development of Laojunshan area, sedimenting in form of subside in the pre-Caledonian epoch, upheavaling in the late-Caledonian epoch and arising orogeny from the Indo-Chinese epoch to the Yannshan epoch, and undergoing sedimention, regional metamorphism, migmatization, granitization and remelting magma emplacement. Because Laojunshan granite possesses features of autochthonous and parautochthonous transformation type granite, origin of Laojunshan rock body belongs to continental crust alterational and metasomatic remelting granite.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 3375-3379
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.3375
• Online since: January 2013
• Authors: Ying Shu Li, Yan Cai, Jiao Jiao Chen, Nan Chen, Lun Wang, Yi Ke Zhang, Da Qing He
• Keywords: Evolution, Geochemistry, Granite, Laojunshan in East-South Yunnan

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DOI: 10.1016/b978-0-444-42148-7.50008-3

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