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Chemical aspects of a brine pool at the East Flower Garden bank, northwestern Gulf of Mexico 1
Author(s) -
Brooks James M.,
Bright Thomas J.,
Bernard Bernie B.,
Schwab Claude R.
Publication year - 1979
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1979.24.4.0735
Subject(s) - brine , anoxic waters , sulfur , hydrogen sulfide , geology , oceanography , salinity , seawater , sulfide , environmental chemistry , geochemistry , mineralogy , chemistry , organic chemistry
A small pool on the flank of the East Flower Garden bank at a depth of 72 m in the Gulf of Mexico contains anoxic, hypersaline (∼200 g·kg −1 ) water. The flux of brine into and out of the pool contributes to erosional processes on the bank. The bulk ionic composition of the brine is similar to that of the Orca Basin brine, but differences between the two in gaseous hydrocarbon and carbon isotope content indicate different modes of origin. High levels of bacterial activity in the brine are indicated by ATP (>80 ng·liter −1 ), hydrogen sulfide (>2,000 µ mol·liter −1 ), isotopically light ∑CO 2 (δ 13 C = −23%), and the apparent generation of elemental sulfur.