Restoration of denudation thickness is of great significance to understanding tectonic evolution,hydrocarbon migration and accumulation history in petroliferous basins.How to accurately restore and distinguish denudat...Restoration of denudation thickness is of great significance to understanding tectonic evolution,hydrocarbon migration and accumulation history in petroliferous basins.How to accurately restore and distinguish denudation thicknesses in different periods,however,is difficult.With measurements of vitrinite reflectance(Ro)and interval transit time,along with stratigraphic profile comparison,we restored the total denudation thickness of the Cretaceous in the central Sichuan Basin at a depth range of1100-3300 m.The apatite fission track analysis(AFTA)was employed to identify the denudation periods,namely,the Late Yanshanian,Early Himalayan and the Late Himalayan orogenic epochs,and the ratio of their denudation intensity is about 3.8:1:3.9.The denudation thicknesses at different periods provide an important basis for tectonic evolution and hydrocarbon migration and accumulation.Affected by the diverse denudation intensities,the paleo-structures in the study area feature high in the south and low in the north at the Late Jurassic,high in the north and low in the south at the late Early Cretaceous,high in the southeast and low in the northwest at present in succession.EW-and NE-trending folds and faults are the products of inherited development,which have a controlling effect on hydrocarbon migration and accumulation.展开更多
The study of the tectono-sedimentary evolution of the lower Cretaceous series realized in the southern on the tethysian margin in the Tunisian central-Southerner Atlas, shows that the architecture of this field is gov...The study of the tectono-sedimentary evolution of the lower Cretaceous series realized in the southern on the tethysian margin in the Tunisian central-Southerner Atlas, shows that the architecture of this field is governed by a NW-SE compressive phase. This latter has reactivated the old faults to give birth to associated, distensive and compressive structures at the same time simultaneously. It is about a network of combined strike slip fault EW dextral and sinistral NS which divided the cover into four zones of deformation corresponding to the right dihedron of the strike slip fault system. In the compressive dihedron, the deformation develops essentially several folds and in the distensive dihedron, normal faults which delimit horsts and grabens.展开更多
基金financially supported by the National Natural Science Foundation of China(42272151)。
文摘Restoration of denudation thickness is of great significance to understanding tectonic evolution,hydrocarbon migration and accumulation history in petroliferous basins.How to accurately restore and distinguish denudation thicknesses in different periods,however,is difficult.With measurements of vitrinite reflectance(Ro)and interval transit time,along with stratigraphic profile comparison,we restored the total denudation thickness of the Cretaceous in the central Sichuan Basin at a depth range of1100-3300 m.The apatite fission track analysis(AFTA)was employed to identify the denudation periods,namely,the Late Yanshanian,Early Himalayan and the Late Himalayan orogenic epochs,and the ratio of their denudation intensity is about 3.8:1:3.9.The denudation thicknesses at different periods provide an important basis for tectonic evolution and hydrocarbon migration and accumulation.Affected by the diverse denudation intensities,the paleo-structures in the study area feature high in the south and low in the north at the Late Jurassic,high in the north and low in the south at the late Early Cretaceous,high in the southeast and low in the northwest at present in succession.EW-and NE-trending folds and faults are the products of inherited development,which have a controlling effect on hydrocarbon migration and accumulation.
文摘The study of the tectono-sedimentary evolution of the lower Cretaceous series realized in the southern on the tethysian margin in the Tunisian central-Southerner Atlas, shows that the architecture of this field is governed by a NW-SE compressive phase. This latter has reactivated the old faults to give birth to associated, distensive and compressive structures at the same time simultaneously. It is about a network of combined strike slip fault EW dextral and sinistral NS which divided the cover into four zones of deformation corresponding to the right dihedron of the strike slip fault system. In the compressive dihedron, the deformation develops essentially several folds and in the distensive dihedron, normal faults which delimit horsts and grabens.
