Mineralogical Study of the Seafloor Diagenesis of Carbonate Sediments Near Dry Tortugas, Gulf of Mexico, Using Rietveld Method of Crystal Structure Refinement.

Abstract

The carbonate sediments from Fort Jefferson National Monument area were studied for mineralogy using X-ray powder diffraction (XRD) in order to evaluate the effects of seafloor diagenesis on sediment structure. Cementation is suggested at the depths of 120 cm and below by the increase in high-Mg/low-Mg calcite ratio within fine-grained matrix. The relative amounts of calcium carbonate phases were determined by the Rietveld crystal structure refinement. Seafloor diagenesis may be significant at the sediment depths which are not affected by bioturbation and storm mixing.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1995
Accession Number
ADA304780

Entities

People

  • Yoko Furukawa

Organizations

  • University of Southern Mississippi

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundary Layer
  • Calcium Compounds
  • Carbonates
  • Chemistry
  • Core Sampling
  • Crystal Structure
  • Crystals
  • Diffraction
  • Electron Microscopes
  • Geochemistry
  • Military Research
  • Mineralogy
  • Oceanography
  • Scanning Electron Microscopes
  • Shallow Water
  • Water Chemistry
  • X Rays

Readers

  • Coastal Oceanography
  • Geotechnical Engineering.
  • Powder metallurgy of Titanium alloys.