Sediment Provenance and Climate Changes Since the Middle Pleistocene in the Yingqiong Continental Slope of the South China Sea
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The age, grain size compositions and major elemental compositions for sediments in core YQ1 from the Yingqiong continental slope in the South China Sea was determined in this paper. It is noted that the periodically cyclic change of sedimentation rates occurred in the Yingqiong continental slope in the South China Sea. During the interglacial periods, the sedimentation rates were high, while the sedimentation rates exhibited low values during the glacial periods. During Marine Isotope Stage 1 (MIS1), the sedimentary rate could reach about 800 cmkyr−1 and during the MIS6 this area is characterized by the lowest sedimentary rate, which is lower than 3 cmkyr−1. According to the R-mode factor analysis of the major element data, three factors F1 (Al2O3, Fe2O3, TiO2 and K2O), F2 (MgO and MnO) and F3 (Na2O and P2O5) were obtained, which shows that vertical change of the major elemental concentrations in the core was mainly controlled by the nearby terrestrial inputs and the early diagenesis, while the effect of volcanic and biogenous inputs was less. The obvious glacial-interglacial cyclic features are presented in the changes of the typical terrestrial element ratios contained in factor F1, which reflects the impact of glacial-interglacial climatic cycle on the evolution of the East Asian monsoon. This indicates that the major element ratios in terrestrial sediments are significant indicators of regional climate changes.
Key wordsthe South China Sea Yingqiong continental slope major element composition sedimentation rate climate change glacial-interglacial cycle
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This study was financially supported by the National Key Research and Development Program of China (No. 2017 YFC0306703), and the National Natural Science Foundation of China (No. 41706065).
- Chen, R. H., Wang, D. J., Xu, J., Meng, Y., Liu, C. L., Zhao, Q. Y., and Zhang, F. Y., 2003. Calcium and siliceous microfossil in the surface sediments of the northeastern South China Sea and their relationship with the sedimentary environment. Marine Geology & Quaternary Geology, 23(4): 15–21 (in Chinese with English abstract).Google Scholar
- Li, D., Xu, Q., and Wang, Y. F., 2015. Provenance analysis of the Pliocene central canyon in Qiongdongnan Basin and its implications. Acta Sedimentologica Sinica, 33(4): 659–664 (in Chinese with English abstract).Google Scholar
- Liu, J., Xiang, R., Kao, S. J., Fu, S., and Zhou, L., 2016. Sedimentary responses to sea-level rise and Kuroshio Current intrusion since the Last Glacial Maximum: Grain size and clay mineral evidence from the northern South China Sea slope. Palaeogeography, Palaeoclimatology, Palaeoecology, 450: 111–121.CrossRefGoogle Scholar
- Liu, Z. F., Tuo, S. T., Colin, C., Liu, T. J., Hung, C. Y., Selvaraj, K., Chen, C. T. A., Zhao, Y., Siringan, F. P., Boulay, S., and Chen, Z., 2008. Detrital fine-grained sediment contribution from Taiwan to the northern South China Sea and its relation to regional ocean circulation. Marine Geology, 255(3-4): 149–155.CrossRefGoogle Scholar
- Peng, J. L., and Chen, S. L., 2010. Analysis on sedimentary characteristics and environments in nearshore of Lianyungang. Advances in Marine Science, 28(4): 445–454 (in Chinese with English abstract).Google Scholar
- Shu, Z. H., Yang, S. Y., Dou, Y. G., Liu, Z. X., Yu, H., and Serge, B., 2009. Geochemical compositions and paleoenvironmental implication of the residual fractions of core DGkS9604 sediments in the middle Okinawa Trough. Tropical Geography, 29(3): 236–240, 273 (in Chinese with English abstract).Google Scholar
- Tian, X., Xu, F. J., Wu, S. Z., Zhang, J., Guo, C., and Dong, J., 2015a. Clay mineral characteristics and provenance of continental shelf sediments in eastern Hainan Island since middle Holocene. Earth Science — Journal of China University of Geosciences, 40(9): 1497–1504 (in Chinese with English abstract).CrossRefGoogle Scholar
- Tian, X., Xu, F. J., Xu, W., and Liu, X. L., 2015b. 4400 a East Asian monsoon record from sediments in the continental shelf of the northern South China Sea. Marine Sciences, 39(9): 62–68 (in Chinese with English abstract).Google Scholar
- Wang, H. R., Wang, Y. M., Qiu, Y., Peng, X. C., and Liu, Y. Y., 2008. Geomorphology and its control of deep-water slope of the margin of the South China Sea. Acta Oceanologica Sinica, 30(2): 70–79 (in Chinese with English abstract).Google Scholar
- Wang, W. G., and Chen, J., 2011. Distribution characters of major elemental composition contents and the influence factors in sediments of the late Pleistocene in central South China Sea. Journal of Oceanography in Taiwan Strait, 30(4): 449–457 (in Chinese with English abstract).Google Scholar
- Wei, G. J., Li, X. H., Liu, Y., Shao, L., and Liang, X. R., 2005. Transfer patterns of Mn, Cd and Mo in sediments during early diagenesis evidences from sediment cores at ODP site 1148. Geochimca, 34(2): 129–135 (in Chinese with English abstract).Google Scholar
- Wei, G. J., Liu, Y., Li, X. H., Lei, S., and Dian, Y. F., 2004. Major and trace element variations of the sediments at ODP site 1144, South China Sea, during the last 230 ka and their paleoclimate implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 212(3-4): 331–342.CrossRefGoogle Scholar
- Zhang, J., Meng, X. W., and Wang, X. Q., 2013. The record of major element ratios in late Quaternary at northern slope of the South China Sea and its indicative significance on the cooling events. Acta Oceanologica Sinica, 35(4): 106–111 (in Chinese with English abstract).Google Scholar
- Zhao, H. Q., Han, X. B., Chen, R. H., Chu, F. Y., and Gao, S. T., 2008. Charicteristics of main elements and their palaeoenvironment significance of core 191 in the northern South China Sea. Acta Oceanologica Sinica, 30(6): 85–93 (in Chinese with English abstract).Google Scholar
- Zhao, S. H., Liu, Z. F., Chen, Q., Wang, X. X., Shi, J. N., Jin, H. Y., Liu, J. J., and Jian, Z. M., 2017. Spatiotemporal variations of deep-sea sediment components and their fluxes since the last glaciation in the northern South China Sea. Science China Earth Sciences, 60: 1368–1381.CrossRefGoogle Scholar
- Zhuo, H. T., Wang, Y. M., Xu, Q., Li, D., Wang, Y., Wang, Y. F., Li, H., and Tang, W., 2014. Classification and genesis of continental slopes on the northern South China Sea. Acta Geologica Sinica, 88(3): 327–336 (in Chinese with English abstract).Google Scholar