Wan, Shiming; Li, Anchun; Clift, Peter D; Wu, Shiguo; Xu, Kehui; Li, Tiegang (2010): Age and clay mineral analysis and trace element concentrations from ODP Sites 184-1144 and 184-1146 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.763933, Supplement to: Wan, S et al. (2010): Increased contribution of terrigenous supply from Taiwan to the northern South China Sea since 3 Ma. Marine Geology, 278(1-4), 115-121, https://doi.org/10.1016/j.margeo.2010.09.008
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Abstract:
Seismic profiles provide evidence that there has been strong transport by deep-water bottom currents and drift deposition on the northern slope of the South China Sea. Earlier geochemical studies suggest that the drift sediments originated primarily from Taiwan. However, the transport process, history and origin of the deep-water bottom deposition in the northern South China Sea, on both glacial-interglacial and tectonic time scales, remain unclear. Here, we show new high-resolution records of clay minerals, grain size and mass accumulation rate (MAR) of terrigenous materials from Ocean Drilling Program (ODP) Site 1144, together with trace element concentrations in siliciclastic sediments from ODP Site 1146. Combined with other published data, we find that the primary source for sediments at ODP Sites 1144-1148 since 3 Ma is from Taiwan, and not from Pearl River as previously thought. Before 3 Ma, however, sediment source to ODP Sites 1146 and 1148 was mainly from the Pearl River. Increased contribution of terrigenous supply from Taiwan to the northern South China Sea since ~ 3 Ma may be related to the formation of the Taiwan orogen and strengthening of deep-water bottom current transport in the northern South China Sea. Variations in clay mineralogy and sedimentology at ODP Site 1144, located on a sediment drift, shows strong glacial-interglacial cyclicity. This suggests that bottom current deposition is highly dependent on sea-level fluctuations, which control the terrigenous supply to the deep sea.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 19.754850 * Median Longitude: 116.845983 * South-bound Latitude: 19.456700 * West-bound Longitude: 116.272917 * North-bound Latitude: 20.053000 * East-bound Longitude: 117.419050
Date/Time Start: 1999-03-13T00:00:00 * Date/Time End: 1999-03-29T00:00:00
Event(s):
184-1144 * Latitude: 20.053000 * Longitude: 117.419050 * Date/Time Start: 1999-03-13T00:00:00 * Date/Time End: 1999-03-18T00:00:00 * Elevation: -2037.0 m * Penetration: 1108.5 m * Recovery: 1113 m * Location: South China Sea * Campaign: Leg184 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 118 cores; 1103.5 m cored; 5 m drilled; 100.9% recovery
184-1146 * Latitude: 19.456700 * Longitude: 116.272917 * Date/Time Start: 1999-03-21T00:00:00 * Date/Time End: 1999-03-29T00:00:00 * Elevation: -2091.5 m * Penetration: 1455.6 m * Recovery: 1451.7 m * Location: South China Sea * Campaign: Leg184 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 153 cores; 1450.6 m cored; 5 m drilled; 100.1% recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Wan, S; Li, A; Clift, PD et al. (2010): Appendix A2. Clay minerals and age analysis from ODP Site 184-1144. https://doi.org/10.1594/PANGAEA.763930
- Wan, S; Li, A; Clift, PD et al. (2010): Appendix A1. Clay minerals analysis and trace element concentartions from ODP Site 184-1146. https://doi.org/10.1594/PANGAEA.763932