10.6084/m9.figshare.1466822.v4 Xiguang Deng Xiguang Deng Liang Yi Liang Yi Greig A. Paterson Greig A. Paterson Huafeng Qin Huafeng Qin Haifeng Wang Haifeng Wang Huiqiang Yao Huiqiang Yao Jiangbo Ren Jiangbo Ren Junyi Ge Junyi Ge Hongzhou Xu Hongzhou Xu Chenglong Deng Chenglong Deng Rixiang Zhu Rixiang Zhu Magnetostratigraphic evidence for deep-sea erosion on the Pacific Plate, south of Mariana Trench, since the middle Pleistocene: potential constraints for Antarctic bottom water circulation Taylor & Francis Group 2015 jl polarity chron Pacific Ocean sedimentation cm Eastern Pacific Oceans Antarctic Bottom Water Mariana Trench Middle Pleistocene Antarctic bottom water circulation erosion data AABW 7KGC 2015-10-08 16:12:02 Journal contribution https://tandf.figshare.com/articles/journal_contribution/Magnetostratigraphic_evidence_for_deep_sea_erosion_on_the_Pacific_Plate_south_of_Mariana_Trench_since_the_middle_Pleistocene_potential_constraints_for_Antarctic_bottom_water_circulation/1466822 <div><p></p><p>The Antarctic Bottom Water (AABW) current plays a crucial role in storing and transporting heat, water, and nutrients around the world. However, it is impossible to monitor AABW in the Plio-Pleistocene by direct measurement. Hence, abyssal erosion was usually chosen as an effective indicator of the presence of the AABW in the Indian and Eastern Pacific Oceans during that period. Here, we report a high-resolution magnetostratigraphy of a gravity core, the JL7KGC-01A from the south of the Mariana Trench, northwest Pacific Ocean. The main results are as follows: (1) polarity data suggest that the sequence recorded the late Gauss chron to the early Brunhes chron, including the Jaramillo, Cobb Mountain, and Olduvai normal subchrons; (2) the sedimentary processes in the study area since 2.9 Ma show three stages of sedimentation: 83 cm/Ma during 2.9–1.2 Ma, 183 cm/Ma during 1.2–0.7 Ma, and no sedimentation since ~0.7 Ma; (3) the area south of the Mariana Trench experienced a significant change in the deposition rate at 1.2 Ma, which could be correlated with the intensified desertification in inland Asia, and experienced a prominent depositional hiatus since the early middle Pleistocene, which likely resulted from the enhanced/expanded AABW. Based on these new polarity data and comparisons with previous studies around the Pacific Ocean, we therefore propose that the AABW experienced a notable change during the early–mid Pleistocene transition.</p></div>