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Deformation of the Shirenshan Block in the North Qinling
Author(s) -
WANG Jingya,
REN Shenglian,
LI Jiahao,
LI Quanzhong,
SONG Chuanzhong,
LI Longmin,
LIN Shoufa,
HUANG Yonglong,
HAN Xu,
LI Zhenqiang
Publication year - 2017
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 - 10.1111/1755-6724.13086
Subject(s) - chinese academy of sciences , library science , china , geography , archaeology , computer science
The Qinling orogenic belt is a typical complex continental orogenic belt which has experienced multiperiod tectonic evolution and where some important tectonic belts formed. The Luoluan fault is one of the most important belts, which is the boundary fault of the North China Plate and the Qinling orogenic belt. The Shirenshan block is located in the north section between Luanchuan and Fangcheng of the Luoluan fault. The north part is undeformed Yanshanian monzogranites; the middle part is Proterozoic granite gneiss, and in the south it is mainly gneiss and migmatite of the Taihua Group from late Archean to early Proterozoic. Previous research suggested that the Shirenshan block is an ancient geological body, which is remelted by the subduction shear of Luoluan fault. The granite has been squeezed into the shear zone and it occurred at about 380–400Ma. However, sufficient data show that the Shirenshan block has zircon ages of 110–130Ma, which is inconsistent with the previous studies. Therefore, it is necessary to uncover the formation of Shirenshan block and its relationship with Luoluan fault, and it could provide basis for the study of Mesozoic intracontinental orogeny of the north Qinling.