Liu, Zhifei; Trentesaux, Alain; Clemens, Steven C; Colin, Christophe; Wang, Pinxian; Huang, Baoqi; Boulay, Sebastien (2003): Age model of ODP Site 184-1146 (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.758825, Supplement to: Liu, Z et al. (2003): Clay mineral assemblages in the northern South China Sea: implications for East Asian monsoon evolution over the past 2 million years. Marine Geology, 201(1-3), 133-146, https://doi.org/10.1016/S0025-3227(03)00213-5
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Abstract:
Clay mineral assemblages at ODP Site 1146 in the northern South China Sea are used to investigate sediment source and transport processes and to evaluate the evolution of the East Asian monsoon over the past 2 Myr. Clay minerals consist mainly of illite (22–43%) and smectite (12–48%), with associated chlorite (10–30%), kaolinite (2–18%), and random mixed-layer clays (5–22%). Hydrodynamic and mineralogical studies indicate that illite and chlorite sources include Taiwan and the Yangtze River, that smectite and mixed-layer clays originate predominantly from Luzon and Indonesia, and that kaolinite is primarily derived from the Pearl River. Mineral assemblages indicate strong glacial–interglacial cyclicity, with high illite, chlorite, and kaolinite content during glacials and high smectite and mixed-layer clay content during interglacials. During interglacials, summer enhanced monsoon (southwesterly) currents transport more smectite and mixed-layer clays to Site 1146 whereas during glacials, enhanced winter monsoon (northerly) currents transport more illite and chlorite from Taiwan and the Yangtze River. The ratio (smectite+mixed layers)/(illite+chlorite) was adopted as a proxy for East Asian monsoon variability. Higher ratios indicate strengthened summer-monsoon winds and weakened winter-monsoon winds during interglacials. In contrast, lower ratios indicate a strongly intensified winter monsoon and weakened summer monsoon during glacials. Spectral analysis indicates the mineral ratio was dominantly forced by monsoon variability prior to the development of large-scale glaciation at 1.2 Myr and by both monsoon variability and the effects of changing sea level in the interval 1.2 Myr to present.
Related to:
Clemens, Steven C; Prell, Warren L (2003): Data Report: Oxygen and carbon isotopes from Site 1146, northern South China Sea. In: Prell, W.L., Wang, P., Blum, P., Rea, D.K., Clemens, S.C. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 184, 1-8, https://doi.org/10.2973/odp.proc.sr.184.214.2003
Huang, Baoqi (2002): Late Plio-Pleistocene Evolution of the East Asian Monsoon Recorded by Foraminiferal Fauna in the Northern South China Sea. Tongji University, Shanghai, 98 pp
Wang, Pinxian; Prell, Warren L; Blum, Peter; et al. (2000): Proceedings of the Ocean Drilling Program, 184 Initial Reports. Proceedings of the Ocean Drilling Program, Ocean Drilling Program, 184, online, https://doi.org/10.2973/odp.proc.ir.184.2000
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 19.456700 * Longitude: 116.272917
Date/Time Start: 1999-03-21T00:00:00 * Date/Time End: 1999-03-29T00:00:00
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 198.70 m
Event(s):
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
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Age model | Age model | ka | Liu, Zhifei | ||
| 3 | Datum level | DL | Liu, Zhifei | |||
| 4 | Reference/source | Reference | Liu, Zhifei |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
53 data points