The coupling of fluid flow and uplift since Late Cretaceous in Zoige area, western Sichuan

• Published in: Science China. Earth sciences Vol. 54; no. 7; pp. 1043 - 1052
• Main Authors: Deng, Bin, Liu, ShuGen, Li, JuChu, Wang, GuoZhi, Liu, Shun, Li, ZhiWu, Li, XiangHui
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science China Press 01.07.2011; Springer Nature B.V
• Subjects: Cretaceous; Earth and Environmental Science; Earth science; Earth Sciences; Fluid dynamics; Fluid flow; Freshwater pollution; Geochemistry; Geology; Neogene; Petroleum geology; Research Paper; 四川西部; 幕式流体流动; 应力应变行为; 晚白垩世; 磷灰石裂变径迹; 耦合效应; 若尔盖地区; 隆起; China; Sichuan China; China, People's. Rep., Xizang, Qing Zang Gaoyuan Plateau, Zoige; decompression in the uplift; multi-episodic uplift; episodic migration; Zoige area; paleo-fluid
• ISSN: 1674-7313; 1869-1897
• DOI: 10.1007/s11430-011-4185-2

The uplift indicated by five AFT （apatite fission track） samples is more than 3400 m by multi-episodic uplift since Late Creta- ceous in Zoige area; especially the processes of fast uplift in Late Cretaceous and Neogene have important influences on the stress of paleo-fluid. Based on field geology, macroscopic features of fracture, and geochemistry of fluid inclusions, we deci- pher the paleo-fluid process of episodic migration. In early uplift stage, the temperature of inclusions increased with the con- stant salinity, whilst both of them proportionally decreased in the mid-late stage, indicating the different tendency of heat-fluid warming and freshwater contamination at different time. Of particular importance are the features of episodic fluid flow, such as ESR ages, and features of multi-episodic migration that correspond well with the process of multi-episodic uplift. Thus, concerning the rock stress-strain behavior responding to uplift, we further discuss the spatio-temporal coupling effect of epi- sodic migration and decompression in multi-episodic uplift, thereby to better understand petroleum geology in the region.