Biogeochemistry of organic matter deposition and diagenesis in Bering-Chukchi and Gulf of Mexico sediments
Thesis/Dissertation
·
OSTI ID:5456032
The research described focused on two biogeochemical processes: (1) the formation of {sup 13}C-depleted carbonates in sediments influenced by natural, submarine hydrocarbon seepage, and (2) the distribution, deposition and early diagenesis of marine and terrigenous organic matter in continental shelf sediments from a sub-arctic and a sub-tropical environment. Active diapirism has produced extensive deformation and faulting of Quaternary sediments in the Green Canyon area of the upper slope off the Louisiana coast in the Gulf of Mexico. Piston-cored sediments from the faulted area contain macroscopic inclusions of petroleum and natural gas hydrates, as well as isotopically anomalous authigenic and skeletal carbonates. Calcite, aragonite and dolomite with {delta}{sup 13}C(PDB) values as negative as {minus}56.7 permil are found in nodules, disseminated particles and faunal remains. Anaerobic methane oxidation by sulfate-reducing bacteria is the probable source of the {sup 13}C-depleted carbonates in these samples. Oxygen isotope ratios and barite inclusions indicate that formation waters were involved in nodule precipitation.
- Research Organization:
- Texas Univ., Austin, TX (USA)
- OSTI ID:
- 5456032
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
ATLANTIC OCEAN
BERING SEA
BIOGEOCHEMISTRY
CALCITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CARIBBEAN SEA
CENOZOIC ERA
CHEMISTRY
DIAGENESIS
DOLOMITE
EVEN-ODD NUCLEI
GEOCHEMISTRY
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GULF OF MEXICO
ISOTOPES
LIGHT NUCLEI
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NUCLEI
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PACIFIC OCEAN
PETROLEUM DEPOSITS
QUATERNARY PERIOD
RESOURCES
ROCKS
SEAS
SEDIMENTARY ROCKS
SOURCE ROCKS
STABLE ISOTOPES
SURFACE WATERS
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
ATLANTIC OCEAN
BERING SEA
BIOGEOCHEMISTRY
CALCITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CARIBBEAN SEA
CENOZOIC ERA
CHEMISTRY
DIAGENESIS
DOLOMITE
EVEN-ODD NUCLEI
GEOCHEMISTRY
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GULF OF MEXICO
ISOTOPES
LIGHT NUCLEI
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NUCLEI
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PACIFIC OCEAN
PETROLEUM DEPOSITS
QUATERNARY PERIOD
RESOURCES
ROCKS
SEAS
SEDIMENTARY ROCKS
SOURCE ROCKS
STABLE ISOTOPES
SURFACE WATERS