The coupling relationship between the west Shandong rise and the Jiyang depression, China
Li Li , Dalai Zhong , Changchun Yang , Xiupeng Shi , Li Zhao , Dawei Dong
Journal of Earth Science ›› 2013, Vol. 24 ›› Issue (4) : 626 -644.
This article reports 21 AFT (apatite fission track) data from the West Shandong (山东) rise (WSR) and Jiyang (济阳) depression, and mainly studies their Cenozoic uplifting/subsidence history and the relationship between them. Furthermore, we improve our insights into the Bohai Bay Basin (BBB). Our AFT analysis and AFT T-t modeling indicates that the WSR was uplifted at ca. 65 Ma with apparent uplift rate of 0.019 mm/a; it underwent two relatively rapid uplifting events at 43–33 and 16–0 Ma with rates of 0.097 and 0.052 mm/a, respectively. Meanwhile, the Jiyang depression subsided at rate of 0.032 mm/a at 52–43 Ma, and the rate increased to 0.13 mm/a at ca. 42–33 Ma; finally the subsidence rate increased to 0.053 mm/a in 16–0 Ma. They all underwent a uplift in time of 23–16 Ma with rate of 0.04–0.07 mm/a. A careful comparison shows that the Cenozoic uplifting of the WSR coupled well with the subsidence of the Jiyang depression. Our research also suggests that the uplift-basin coupling events are part of the couplings between the Bohai Bay Basin and its peripheral mountains. This intraplate mountain-basin coupling is a reflection of global tectonic events.
AFT / tectonic uplift-denudation / subsidence / coupling relationship / western Shandong rise / Jiyang depression
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