Organic carbon analyses of ODP Site 160-971 in the Mediterranean Sea


Autoria(s): Schulz, Hans-Martin; Emeis, Kay-Christian; Volkmann, N
Cobertura

MEDIAN LATITUDE: 33.720215 * MEDIAN LONGITUDE: 24.719966 * SOUTH-BOUND LATITUDE: 33.703300 * WEST-BOUND LONGITUDE: 24.680600 * NORTH-BOUND LATITUDE: 33.736700 * EAST-BOUND LONGITUDE: 24.802000 * DATE/TIME START: 1995-04-17T06:30:00 * DATE/TIME END: 1995-04-24T12:48:00

Data(s)

23/06/1997

Resumo

Mud volcanism on the Mediterranean Ridge is caused by extrusion of overpressured sediments, with consequent formation of spectacular dome-shaped features composed of mud breccias at the seafloor. The organic material in the mud breccia of the Napoli mud volcano is a mixture of different facies, stratigraphic origin and thermal maturities. One portion is synsedimentary organic material with only minor diagenetic alterations and represents sedimenting material that was embedded into the mud volcano during its extrusion. The mud breccia also contains thermally mature organic material of mainly terrestrial provenance with algae of fresh- and brackish-water origin. Vitrinite reflectance data of this maturity generation range from 0.65 to 0.90% R(oil) and thus characterize thermally mature source rocks, a rank which is corroborated by fluorescence and molecular characteristics. The predominance of vitrinite in the maceral assemblages and the occurrence of biomarkers of terrigenous origin suggest that the major part of the mud matrix derives from a lacustrine or riverine sedimentary unit in the subsurface, possibly from the Messinian stage. A third generation of organic material includes inertinites and vitrinites of high reflectance, which represent recycled organic matter present in any marine sediment. By use of the Lopatin method for modelling the thermal maturation of hydrocarbon source rocks from the vitrinite reflectance data, we calculated that the depth of mobilization ranges from 4900 m to 7500 m, depending upon the temperature gradient used.

Formato

application/zip, 2 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.721834

doi:10.1594/PANGAEA.721834

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Schulz, Hans-Martin; Emeis, Kay-Christian; Volkmann, N (1997): Organic carbon provenance and maturity in the mud breccia from the Napoli mud volcano: Indicators of origin and burial depth. Earth and Planetary Science Letters, 147(1-4), 141-151, doi:10.1016/S0012-821X(97)00013-7

Palavras-Chave #160-970A; 160-971A; 160-971B; 160-971D; 160-971E; Aromatic hydrocarbon fraction; Arom HC; CaCO3; Calcium carbonate; Carbon, organic, total; Carbon Preference Index; CPI; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Eastern Basin; equivalent R; Event; Gas chromatography; HC; Hetero componends; Hydrocarbons; Joides Resolution; Label; Lambda fluor int; Leg160; Lipids, total; Lipids tot; Liptinites reflection; Lipt reflec; n-Alkane sum; Ocean Drilling Program; ODP; ODP sample designation; Pr/Phy; Pristane/Phytane ratio; Q; Relative fluorescence intensity, ratio; R max, wavelength 546 nm; R min, wavelength 546 nm; Sample code/label; TOC; Vitrinite reflection; Vitr refl; Wavelength of highest fluorescence intensity; wavelength of maximal flourescence intesity
Tipo

Dataset