Apatite Fission Track Evidence for Mesozoic-Cenozoic Differential Uplift on Both Sides of Qinfang Tectonic Belt in <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on">Southern Guangxi</st1:place><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

Apatite Fission Track Evidence for Mesozoic-Cenozoic Differential Uplift on Both Sides of Qinfang Tectonic Belt in Southern Guangxi

详细信息

责任者：Qin Xiaofeng (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Pan Luozhong
刊名：Journal of Guilin University of Technology
出版年：2010
卷期：30(3)
关键词：构造带 ; tectonic zones ; 裂变径迹计时 ; fission-track dating ; 隆起 ; uplifts ; 广西 ; Guangxi
页码：p.325-331
图表：4 illus., 2 tables, 41 refs.
分类号：0300
issnNo：ISSN1674-9057
isbnNo：CN45-1375/N

摘要

The apatite fission track (AFT) chronology from the eight samples in both sides of the Qinfang tectonic belt shows that the AFT ages of three out of four samples in the southeast side of the tectonic belt are between 44.5±2.3 Ma and 53.2±5.7 Ma which is relatively younger. During 44.5~66.2 Ma, the uplift rate in the southeast side of the tectonic belt is 0.007~0.012 mm/a. Since 47.4 Ma, the average denudation rate is 0.095 mm/a, and the average uplift rate is 0.095 mm/a in the southeast side. Meanwhile, the AFT ages in the northwest side of the tectonic belt is (58.2±3.7)-(63.1±4.93) Ma which is obviously older. The average rate of denudation and uplift is 0.073 mm/a and 0.084 mm/a in the northwest side of the Qinfang tectonic belt since 61.5 Ma, obvious differential uplifting process in both sides of the Qinfang tectonic belt since Eocene.