EVIDENCE OF STRUCTURE-H HYDRATE, GULF-OF-MEXICO CONTINENTAL-SLOPE

Citation
R. Sassen et Ir. Macdonald, EVIDENCE OF STRUCTURE-H HYDRATE, GULF-OF-MEXICO CONTINENTAL-SLOPE, Organic geochemistry, 22(6), 1994, pp. 1029-1032
Citations number
12
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
ISSN journal
01466380
Volume
22
Issue
6
Year of publication
1994
Pages
1029 - 1032
Database
ISI
SICI code
0146-6380(1994)22:6<1029:EOSHGC>2.0.ZU;2-D
Abstract
A research submarine was used to sample an amber-colored gas hydrate e xposed on the sea-floor at 540 m water depth in the Gulf of Mexico con tinental slope, offshore Louisiana. The hydrate composition is novel f or a natural occurrence because i-C-5 comprises 41.1% of the total C-i -C-5 hydrocarbon distribution. The relative abundance of i-C-5 is cons istent with an hexagonal (H) lattice structure that is capable of encl osing larger hydrocarbon molecules than either structure I or II hydra tes. Structure H hydrate, which has not been identified previously in nature, coexists with structure II hydrate on the Gulf slope.