Grain-size analyses and bulk chemistry determined in surface sediment samples along the Chilean continental margin in the Southeast Pacific Ocean

Autoria(s): Stuut, Jan-Berend; Kasten, Sabine; Lamy, Frank; Hebbeln, Dierk
Cobertura

MEDIAN LATITUDE: -33.788170 * MEDIAN LONGITUDE: -73.121931 * SOUTH-BOUND LATITUDE: -44.284160 * WEST-BOUND LONGITUDE: -75.864660 * NORTH-BOUND LATITUDE: -22.800330 * EAST-BOUND LONGITUDE: -70.490330 * DATE/TIME START: 2001-04-02T09:26:00 * DATE/TIME END: 2001-05-12T10:23:00
Data(s)

14/05/2010
Resumo

Physical, chemical, and mineralogical properties of a set of surface sediment samples collected along the Chilean continental slope (21-44°S) are used to characterise present-day sedimentation patterns and sediment provenance on the Chilean margin. Despite the presence of several exceptional latitudinal gradients in relief, oceanography, tectonic evolution, volcanic activity and onshore geology, the present-day input of terrigenous sediments to the Chilean continental margin appears to be mainly controlled by precipitation gradients, and source-rock composition in the hinterland. General trends in grain size denote a southward decrease in median grain-size of the terrigenous (Corganic, CaCO3 and Opal-free) fraction, which is interpreted as a shift from aeolian to fluvial sedimentation. This interpretation is supported by previous observations of southward increasing bulk sedimentation rates. North-south trends in sediment bulk chemistry are best recognised in the iron (Fe) and titanium (Ti) vs. potassium (K) and aluminium (Al) ratios of the sediments that most likely reflect the contribution of source rocks from the Andean volcanic arc. These ratios are high in the northernmost part, abruptly decrease at 25°S, and then more or less constantly increase southwards to a maximum at ~40°S.
Formato

application/zip, 3 datasets
Identificador

https://doi.pangaea.de/10.1594/PANGAEA.738150

doi:10.1594/PANGAEA.738150
Idioma(s)

en
Publicador

PANGAEA
Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted
Fonte

Supplement to: Stuut, Jan-Berend; Kasten, Sabine; Lamy, Frank; Hebbeln, Dierk (2007): Sources and modes of terrigenous sediment input to the Chilean continental slope. Quaternary International, 161(1), 67-76, doi:10.1016/j.quaint.2006.10.041
Palavras-Chave #0.412-0.375 µm; 0.452-0.412 µm; 0.496-0.452 µm; 0.545-0.496 µm; 0.598-0.545 µm; 0.656-0.598 µm; 0.721-0.656 µm; 0.791-0.721 µm; 0.868-0.791 µm; 0.948-1.041 mm; 0.953-0.868 µm; 1.041-1.143 mm; 1.047-0.953 µm; 1.143-1.255 mm; 1.149-1.047 µm; 1.255-1.377 mm; 1.261-1.149 µm; 1.377-1.512 mm; 1.384 -1.261 µm; 1.512-1.66 mm; 1.520-1.384 µm; 1.668-1.520 µm; 1.822-1.660 mm; 1.832-1.668 µm; 10.78-9.818 µm; 101.1-92.09 µm; 11.83-10.78 µm; 111.0-101.1 µm; 12.99-11.83 µm; 121.8-111.0 µm; 133.7-121.8 µm; 14.26-12.99 µm; 146.8-133.7 µm; 15.65-14.26 µm; 161.2-146.8 µm; 17.18-15.65 µm; 176.8-161.2 µm; 18.86-17.18 µm; 194.2-176.8 µm; 2.010-1.832 µm; 2.207-2.010 µm; 2.423-2.207 µm; 2.660-2.423 µm; 2.920-2.660 µm; 20.70-18.86 µm; 2000-1822 µm; 213.2-194.2 µm; 213.2-234.1 µm; 22.73-20.70 µm; 234.1-256.8 µm; 24.95-22.73 µm; 256.8-282.1 µm; 27.38-24.95 µm; 282.1-309.6 µm; 3.205-2.920 µm; 3.519-3.205 µm; 3.862-3.519 µm; 30.07-27.38 µm; 309.6-339.8 µm; 33.01-30.07 µm; 339.8-373.1 µm; 36.24-33.01 µm; 373.1-409.6 µm; 39.77-36.24 µm; 4.240-3.863 µm; 4.655-4.240 µm; 409.6-449.7 µm; 43.67-39.78 µm; 449.7-493.6 µm; 47.94-43.67 µm; 493.6-541.9 µm; 5.110-4.655 µm; 5.610-5.110 µm; 52.62-47.94 µm; 541.9-594.9 µm; 57.77-52.62 µm; 594.9-653 µm; 6.158-5.611 µm; 6.761-6.158 µm; 63.41-57.77 µm; 653.0-716.9 µm; 69.62-63.41 µm; 7.421-6.760 µm; 716.9-786.9 µm; 76.42-69.61 µm; 786.9-863.9 µm; 8.147-7.421 µm; 8.943-8.147 µm; 83.89-76.42 µm; 863.9-948.2 µm; 9.818-8.943 µm; 92.09-83.90 µm; Al; Aluminium; Beckman Coulter Laser diffraction particle size analyzer LS 200; Calculated; Center for Marine Environmental Sciences; CTD/Rosette; CTD-RO; D50; Depth; DEPTH, sediment/rock; Event; Fe; Fe/Al; Fe/K; Fe/Ti; GeoB7103-4; GeoB7104-6; GeoB7106-1; GeoB7108-1; GeoB7112-1; GeoB7114-1; GeoB7115-1; GeoB7116-1; GeoB7118-1; GeoB7119-1; GeoB7120-1; GeoB7121-1; GeoB7122-1; GeoB7123-1; GeoB7127-1; GeoB7128-1; GeoB7129-1; GeoB7130-1; GeoB7131-1; GeoB7132-1; GeoB7133-1; GeoB7134-1; GeoB7135-1; GeoB7136-1; GeoB7137-1; GeoB7138-1; GeoB7139-1; GeoB7140-1; GeoB7141-1; GeoB7142-1; GeoB7144-1; GeoB7147-1; GeoB7148-1; GeoB7149-1; GeoB7150-1; GeoB7152-1; GeoB7153-1; GeoB7154-2; GeoB7155-1; GeoB7156-1; GeoB7157-1; GeoB7158-1; GeoB7159-1; GeoB7160-4; GeoB7161-5; GeoB7162-4; GeoB7163-5; GeoB7166-2; GeoB7167-4; GeoB7169-2; GeoB7170-1; GeoB7171-2; GeoB7172-4; GeoB7173-4; GeoB7174-3; GeoB7175-4; GeoB7177-3; GeoB7179-1; GeoB7180-1; GeoB7181-1; GeoB7182-1; GeoB7183-1; GeoB7186-1; GeoB7187-1; GeoB7189-1; GeoB7190-1; GeoB7191-1; GeoB7192-1; GeoB7194-1; GeoB7195-1; GeoB7197-1; GeoB7198-1; GeoB7199-2; GeoB7202-1; GeoB7203-1; GeoB7207-1; GeoB7208-1; GeoB7211-1; GeoB7212-1; GeoB7213-1; GeoB7215-1; GeoB7216-1; GeoB7218-1; GeoB7219-1; Grain size, mean; gs mean; ICP-OES, Perkin-Elmer, Optima 3300R; Iron; Iron/Aluminium ratio; Iron/Potassium ratio; Iron/Titanium ratio; K; K/Ti; Magnesium; Magnesium/Aluminium ratio; Magnesium/Zirconium ratio; MARUM; Median, grain size; Mg; Mg/Al; Mg/Zr; MUC; MultiCorer; off Chile; Potassium; Potassium/Titanium ratio; PUCK; Size fraction 0.412-0.375 µm; Size fraction 0.452-0.412 µm; Size fraction 0.496-0.452 µm; Size fraction 0.545-0.496 µm; Size fraction 0.598-0.545 µm; Size fraction 0.656-0.598 µm; Size fraction 0.721-0.656 µm; Size fraction 0.791-0.721 µm; Size fraction 0.868-0.791 µm; Size fraction 0.948-1.041 mm; Size fraction 0.953-0.868 µm; Size fraction 1.041-1.143 mm; Size fraction 1.047-0.953 µm; Size fraction 1.143-1.255 mm; Size fraction 1.149-1.047 µm; Size fraction 1.255-1.377 mm; Size fraction 1.261-1.149 µm; Size fraction 1.377-1.512 mm; Size fraction 1.384 -1.261 µm; Size fraction 1.512-1.660 mm; Size fraction 1.520-1.384 µm; Size fraction 1.668-1.520 µm; Size fraction 1.822-1.660 mm; Size fraction 1.832-1.668 µm; Size fraction 10.78-9.818 µm; Size fraction 101.1-92.09 µm; Size fraction 11.83-10.78 µm; Size fraction 111.0-101.1 µm; Size fraction 12.99-11.83 µm; Size fraction 121.8-111.0 µm; Size fraction 133.7-121.8 µm; Size fraction 14.26-12.99 µm; Size fraction 146.8-133.7 µm; Size fraction 15.65-14.26 µm; Size fraction 161.2-146.8 µm; Size fraction 17.18-15.65 µm; Size fraction 176.8-161.2 µm; Size fraction 18.86-17.18 µm; Size fraction 194.2-176.8 µm; Size fraction 2.000-1.822 mm; Size fraction 2.010-1.832 µm; Size fraction 2.207-2.010 µm; Size fraction 2.423-2.207 µm; Size fraction 2.660-2.423 µm; Size fraction 2.920-2.660 µm; Size fraction 20.70-18.86 µm; Size fraction 213.2-194.2 µm; Size fraction 213.2-234.1 µm; Size fraction 22.73-20.70 µm; Size fraction 234.1-256.8 µm; Size fraction 24.95-22.73 µm; Size fraction 256.8-282.1 µm; Size fraction 27.38-24.95 µm; Size fraction 282.1-309.6 µm; Size fraction 3.205-2.920 µm; Size fraction 3.519-3.205 µm; Size fraction 3.862-3.519 µm; Size fraction 30.07-27.38 µm; Size fraction 309.6-339.8 µm; Size fraction 33.01-30.07 µm; Size fraction 339.8-373.1 µm; Size fraction 36.24-33.01 µm; Size fraction 373.1-409.6 µm; Size fraction 39.77-36.24 µm; Size fraction 4.240-3.863 µm; Size fraction 4.655-4.240 µm; Size fraction 409.6-449.7 µm; Size fraction 43.67-39.78 µm; Size fraction 449.7-493.6 µm; Size fraction 47.94-43.67 µm; Size fraction 493.6-541.9 µm; Size fraction 5.110-4.655 µm; Size fraction 5.610-5.110 µm; Size fraction 52.62-47.94 µm; Size fraction 541.9-594.9 µm; Size fraction 57.77-52.62 µm; Size fraction 594.9-653.0 µm; Size fraction 6.158-5.611 µm; Size fraction 6.761-6.158 µm; Size fraction 63.41-57.77 µm; Size fraction 653.0-716.9 µm; Size fraction 69.62-63.41 µm; Size fraction 7.421-6.760 µm; Size fraction 716.9-786.9 µm; Size fraction 76.42-69.61 µm; Size fraction 786.9-863.9 µm; Size fraction 8.147-7.421 µm; Size fraction 8.943-8.147 µm; Size fraction 83.89-76.42 µm; Size fraction 863.9-948.2 µm; Size fraction 9.818-8.943 µm; Size fraction 92.09-83.90 µm; SO156/1; SO156/2; SO156/3; Sonne; Ti; Titanium; X-ray fluorescence core scanner (XRF); Zirconium; Zr
Tipo

Dataset
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