SUMMARY
Characteristics
of tectonic tractures and neotectonic movement of Côn Đảo region in
Cenozoic
Chu
Văn Ngợi, Nguyễn Hữu Tuyên, Phạm Thu Hiên
Côn Đảo
region are composed of 16 different sized islands, of which Côn Sơn is the
largest one. Côn Đảo region is a part of the Côn Sơn uplift
zone and plays a role as the boundary between Cửu Long and Nam Côn
Sơn basins. Côn Đảo region has two-tier structure: basement
part consists mainly of intrusive rocks from mafic to felsic components
belonging to the Định Quán and Đèo Cả complexes, as well
as Đèo Bảo Lộc and Nha Trang Formations. The upper part
consists of Pliocene - Quatemary sediments with negligible thickness. Due to
the special tectonic position, lower Côn Đảo region has undergone
several deformation
phases with strong crushing and weathering process. Based on íĩeld
researches and structural analysis in space and time, integrating and Processing collected data, the article has touched upon characteristics of tectonic
fracture; stress State and tectonic movement of
Côn Đảo region in Cenozoic. The results reveal 5 phases of tectonic
deíbrmation which divided Côn Đảo region into 5 structural blocks
and tectonic movements.
Người biên tập:
TS. Lê Triều Việt.