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First Discovery and Zircon U‐Pb Dating of Early Ordovician Granitoids in Lincang Batholith, Western Yunnan: Implications for the Presence of Proto‐Tethyan Orogeny in the Sanjiang Region, SW China
Author(s) -
XIAO Qianru,
XIONG Fuhao,
ZHAO Han,
FENG Xiujun,
WANG Qiang,
XIAO Yuanfu
Publication year - 2018
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.13518
Subject(s) - china , geochemistry , geology , christian ministry , chinese academy of sciences , zircon , batholith , tectonics , earth science , geography , archaeology , paleontology , political science , law
The Lincang granitic batholith, extending over 370 km from north to south with an area of more than 10000 km, is the major part of the Sanjiang region in western Yunnan, SW China, and is one key area to study the evolution of the Tethys. Previous studies all agreed that the Lincang batholith was formed in the Triassic, and widely considered its formation to be the result of PaleoTethyan orogeny (Dong et al., 2013). However, the early Ordovician syenogranite has been discovered recently for the first time in the Lincang batholith, and its petrologic and geochronological results are presented here to provide evidence in support of its association with Proto-Tethyan orogeny. This new discovery has important significance for understanding the geodynamic history of the Lincang batholith and tectonic evolution of the Sanjiang region.