Accession Number : ADA302499

Title :   Geochemical, Mineralogical and Microstructural Study of the Seafloor Diagenesis of Carbonate Sediments in Fort Jefferson National Monument Area.

Descriptive Note : Quarterly technical rept. Jul-Sep 95,

Corporate Author : UNIVERSITY OF SOUTHERN MISSISSIPPI STENNIS SPACE CENTER CENTER FOR MARINE SCI ENCE

Personal Author(s) : Furukawa, Yoko ; Weisenburg, Denise

PDF Url : ADA302499

Report Date : 30 SEP 1995

Pagination or Media Count : 15

Abstract : The carbonate sediments from Fort Jefferson National Monument area are being studied for porewater geochemistry, mineralogy and microfabric in order to evaluate the effects of seafloor diagenesis to the sediment structure. Cementation is suggested at the depths of 120 cm and below by the increase in high-Mg/low-Mg calcite ratio determined by the Rietveld crystal structure refinement. More detailed mineralogy study and porewater geochemistry of deeper samples will possibly confirm thiS suggestion. Seafloor diagenesis may be significant at the depths where the effects of bioturbation and storm mixing do not reach. jg p.1

Descriptors :   *MICROSTRUCTURE, *SEDIMENTS, *GEOCHEMISTRY, *CARBONATES, *MINERALOGY, CRYSTAL STRUCTURE, STRUCTURAL PROPERTIES, STORMS, MIXING, REFINING.

Subject Categories : Geology, Geochemistry and Mineralogy
      Inorganic Chemistry
      Physical and Dynamic Oceanography
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE