Physical properties of sediment cores of the Bengal Fan


Autoria(s): Weber, Michael E; Niessen, Frank; Kuhn, Gerhard; Wiedicke-Hombach, Michael
Cobertura

MEDIAN LATITUDE: 15.397618 * MEDIAN LONGITUDE: 88.322142 * SOUTH-BOUND LATITUDE: 0.750000 * WEST-BOUND LONGITUDE: 83.333330 * NORTH-BOUND LATITUDE: 21.300000 * EAST-BOUND LONGITUDE: 90.301667 * DATE/TIME START: 1994-01-15T00:00:00 * DATE/TIME END: 1994-01-15T00:00:00

Data(s)

01/06/1997

Resumo

We examined geophysical data from a Multi-Sensor Core Logger (MSCL), a logging device providing continuous measurements of gamma-ray attenuation, p-wave travel time, and magnetic susceptibility on marine sediment cores. In the first part we focused on the gamma-ray system and compared two different calibration methods. From the gamma-ray attenuation, we calculated densities and porosities by incorporating mass weighted attenuation coefficients. The application of an iteration method reduces the error of the density and porosity estimates compared to GRAPE data. In addition, we derived equations to calculate water content and dry bulk density from gamma-ray attenuation measurements. Comparison with physical properties determined on discrete samples revealed a very good correlation of both data sets (r = 0.99). This correlation is valid for sediments from substantially different geological settings (e.g., turbidites, hemipelagic muds, and opal-rich sediments). In the second part we applied our data to marine geological questions. For sediments from the Antarctic Polar Frontal Zone, there is indication that the content of biogenic opal can be assessed using a correlation of density and p-wave velocity. For sediments from the Bengal Fan, the relationship between the MSCL acoustic impedance (the product of density and p-wave velocity) and the grain-size distribution in discrete samples can be used to predict clay and sand/silt ratios for sediment cores from the shelf and upper continental slope.

Formato

application/zip, 7 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.738528

doi:10.1594/PANGAEA.738528

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Weber, Michael E; Niessen, Frank; Kuhn, Gerhard; Wiedicke-Hombach, Michael (1997): Calibration and application of marine sedimentary physical properties using a multi-sensor core logger. Marine Geology, 136(3-4), 151-172, doi:10.1016/S0025-3227(96)00071-0

Palavras-Chave #Bay of Bengal; BENGAL FAN; Density, wet bulk; Depth; DEPTH, sediment/rock; Gravity corer (Kiel type); Indian Ocean; KL; Multi-Sensor Core Logger 14, GEOTEK; Piston corer (BGR type); SFB261; SL; SO93/1; SO93/1_22KL; SO93/2; SO93/2_40KL; SO93/3; SO93/3_103KL; SO93/3_105KL; SO93/3_115KL; SO93/3_124KL; SO93/3_128SL; Sonne; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Suscept; Susceptibility; Velocity, compressional wave; Vp; WBD
Tipo

Dataset