Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s12665-017-6784-5
Volltext Shareable Link
Titel (primär) Numerical modeling of early diagenetic processes in Haiyang 4 Area in the northern slope of the South China Sea
Autor Liu, L.; Luff, R.; Shao, H. ORCID logo ; Kolditz, O. ORCID logo ; Wu, N.
Quelle Environmental Earth Sciences
Erscheinungsjahr 2017
Department ENVINF
Band/Volume 76
Heft 13
Seite von art. 453
Sprache englisch
Keywords Early diagenesis; Organic matter degradation; AOM; The northern slope of the South China Sea
UFZ Querschnittsthemen RU5;
Abstract Early diagenesis affects the distribution of solutes and minerals in unconsolidated sediments. The investigation of diagenesis is critical to understanding the geochemical transformation and benthic fluxes of elements. During the cruise mission SO-177 in 2004, gravity coring samples were recovered in the Haiyang 4 Area of the northern slope of the South China Sea (SCS). The geochemical concentrations in interstitial water were determined onboard. The 1D C.CANDI reactive transport software was used to model the early diagenesis processes at four sites: 56-GC-3, 70-GC-9, 94-GC-11, and 118-GC-13. All of the simulations reproduced concentration profiles that matched the measurements with the implemented geochemical reactions. The degradation of organic carbon and anaerobic oxidation of methane (AOM) primarily determine the distribution of solutes in the working area. The degradation is active in the top 150 cm, and AOM is vigorous at depths below 200 cm. The local advective flux, sediment rate, and kinetic reaction constants of organic matter, methane and sulfate were calibrated based on the existing concentrations of pore water solutes. Geochemical reactions in this area occur in considerably deeper layers compared to depths cited in the literature. The model results provide evidence for the existence of deep hydrocarbon reservoirs that provide methane to the upper sediments.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=19013
Liu, L., Luff, R., Shao, H., Kolditz, O., Wu, N. (2017):
Numerical modeling of early diagenetic processes in Haiyang 4 Area in the northern slope of the South China Sea
Environ. Earth Sci. 76 (13), art. 453 10.1007/s12665-017-6784-5