Back to Abstract Index
Paper Number: 109
Tectonic
Framework of Orogenic belts and Basins System in abdomen of Asia
Yang
Zhanlong1, Chen Qilin1, Li
Xiangbo1
1Northwest
Branch, Research Institute of Petroleum Exploration and Development,
PetroChina, P.R.China, 730020 No.535 Yanerwan R. Chengguan D., Lanzhou
Gansu, P.R.China
___________________________________________________________________________
Taking the orogenic belts and sedimentary basins in abdomen of Asia
into a unified tectonic environment, based on the theory of plate
tectonics to comprehensive analysis the overall tectonic framework and
their evolution of orogenic belts and basins. Study shows that the
northward collision and subduction of India plate and Eurasia plate in
Meso-Cenozoic era is the main geology reason for the development of
orogenic belts and basins system. The continuing activities of Altyn
strike-slip fault, NE-SW direction, is the main controlling factor for
the adjustment of the tectonic framework of orogenic belts and basins
system in abdomen of Asia.
The comprehensive study of geometry, kinematic and dynamic show the
two basic structural units, the basins and the orogenic belts, which
consist of the orogenic belt and basin system in abdomen of Asia, are
close coupling in spatial conversion in material, adjusting and balanced
to each other on the morphology. The movement of orogenic belts not only
provided the filling material to sedimentary basin, but also controlled
the formation, reconstruction and adjustment of structures in basin. The
sediments in basin not only reflect the depression process of basin, but
also record the geological history of the adjacent orogenic belt.
Study shows that the coupling
of sediment provided by orogenic belt and the preservation in
sedimentary basin is the key factor for the developing of source rock,
reservoir and capping formation in basin. The coupling of multi-stage
tectonic activities of orogenic belt and structural developing,
multi-stage hydrocarbon migration driving in basin is the key factor for
the study of hydrocarbon migration and accumulation in basin. The
sedimentary basins circumjacent of the Qinghai-Tibet plateau are one of
main hydrocarbon mineralization areas within the abdomen of Eurasia
continent, so the comprehensive study of the coupling relationship of
orogenic belt and basin system circumjacent the Qinghai-Tibet plateau is
theoretical and practical for the revealing of hydrocarbon accumulation,
especially for the finding of new exploration domain in sedimentary
basins.
Figure1: Distribution of orogenic belts and basins in abdomen of
Asia