Article ID Journal Published Year Pages File Type
4691553 Tectonophysics 2015 14 Pages PDF
Abstract

•Seismic stratigraphy and AFT data are used to constrain the evolution of Liaodong dome.•The Liaodong dome evolves in two main uplift stages, including 65–40 Ma and 30–11.5 Ma.•Continental rifting resulted in the uplifting of Liaodong dome in the first stage.•The reactivity of the Tan-Lu Fault Zone caused the second uplift process of Liaodong dome.

The Liaodong dome is a region of localized uplift and deformation within the Liaodong Bay, Bohai, offshore China. 3-D seismic dataset, vitrinite reflectance and apatite fission track data provide an exceptional opportunity to document the evolution of the Liaodong dome which developed coeval with the Tan-Lu strike-slip fault zone with a rift system. The 3-D seismic data demonstrates that the dome formed before the deposition stage of EsM sequence (40 Ma), and it uplifted again during or after the depositional stage of Ed sequence (32-24 Ma). Apatite fission track and vitrinite reflectance data indicate that the dome experienced two stages of cooling episodes, Paleocene to Early/Middle Eocene (65–40 Ma) and Late Oligocene to Late Miocene (30–11.5 Ma), usually indicating uplifting. Both the seismic stratigraphy and thermal history analysis show that: 1) the Liaodong dome is part of the Jiaoliao terrane; 2) regional continental rifting climaxed during 65–40 Ma, as it did the rift-shoulder uplift of the dome; 3) the reactivation of the Tan-Lu fault caused a second uplift processes of the Liaodong dome during 30–11.5 Ma; 4) the Liaodong dome uplifted independently and separated from the Jiaoliao terrane. Our results also suggest that it is important to take uplifting evolution into consideration to target a potential petroleum reservoir.

Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Earth-Surface Processes
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