Lamy, Frank; Hebbeln, Dierk; Wefer, Gerold (1999): Mineralogy of sediment cores from the continental slope of Chile. PANGAEA, https://doi.org/10.1594/PANGAEA.735158, Supplement to: Lamy, F et al. (1999): High-Resolution Marine Record of Climatic Change in Mid-latitude Chile during the Last 28,000 Years Based on Terrigenous Sediment Parameters. Quaternary Research, 51(1), 83-93, https://doi.org/10.1006/qres.1998.2010
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Marine sediment cores from the continental slope off mid-latitude Chile (33°S) were studied with regard to grain-size distributions and clay mineral composition. The data provide a 28,000-yr14C accelerator mass spectrometry-dated record of variations in the terrigenous sediment supply reflecting modifications of weathering conditions and sediment source areas in the continental hinterland. These variations can be interpreted in terms of the paleoclimatic evolution of mid-latitude Chile and are compared to existing terrestrial records. Glacial climates (28,000-18,000 cal yr B.P.) were generally cold-humid with a cold-semiarid interval between 26,000 and 22,000 cal yr B.P. The deglaciation was characterized by a trend toward more arid conditions. During the middle Holocene (8000-4000 cal yr B.P.), comparatively stable climatic conditions prevailed with increased aridity in the Coastal Range. The late Holocene (4000-0 cal yr B.P.) was marked by more variable paleoclimates with generally more humid conditions. Variations of rainfall in mid-latitude Chile are most likely controlled by shifts of the latitudinal position of the Southern Westerlies. Compared to the Holocene, the southern westerly wind belt was located significantly farther north during the last glacial maximum. Less important variations of the latitudinal position of the Southern Westerlies also occurred on shorter time scales.
Median Latitude: -32.984167 * Median Longitude: -72.061665 * South-bound Latitude: -33.218333 * West-bound Longitude: -72.090000 * North-bound Latitude: -32.750000 * East-bound Longitude: -72.033330
Date/Time Start: 1992-06-12T08:35:00 * Date/Time End: 1995-04-26T00:00:00
GeoB3302-1 (SO101/3_2-1) * Latitude: -33.218333 * Longitude: -72.090000 * Date/Time: 1995-04-26T00:00:00 * Elevation: -1498.0 m * Recovery: 4.12 m * Location: South-East Pacific * Campaign: SO101 (CONDOR-Ia) * Basis: Sonne * Method/Device: Gravity corer (Kiel type) (SL)
Datasets listed in this publication series
- Lamy, F; Hebbeln, D; Wefer, G (1999): (Table 1) Age model of sediment core GIK17748-2. https://doi.org/10.1594/PANGAEA.88195
- Lamy, F; Hebbeln, D; Wefer, G (1999): (Table 1) Age model of sediment core GeoB3302-1. https://doi.org/10.1594/PANGAEA.88196
- Lamy, F; Hebbeln, D; Wefer, G (1999): Mineralogy of sediment core GIK17748-2. https://doi.org/10.1594/PANGAEA.58254
- Lamy, F; Hebbeln, D; Wefer, G (1999): Mineralogy of sediment core GeoB3302-1. https://doi.org/10.1594/PANGAEA.58255