Borehole fluid chemistry of DSDP Holes 395A and 534A results from operation DIANAUT

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doi: 10.1029/91GL02769
Author(s): Gieskes, Joris M.; Magenheim, Andrew J.
Author Affiliation(s): Primary:
Scripps Inst. Oceanogr., La Jolla, CA, United States
Volume Title: Geophysical Research Letters
Source: Geophysical Research Letters, 19(5), p.513-516. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0094-8276 CODEN: GPRLAJ
Note: In English. 12 refs.; illus.
Summary: Fluid samples were obtained in two Deep Sea Drilling Project boreholes, during wireline re-entry logging of Operation DIANAUT in the Atlantic Ocean. Chemical compositions of borehole fluids in Hole 395A suggest the presence of bottom water in the entire borehole, with no evidence of interaction with the borehole wall or of exchange with formation waters. Fluids from Hole 534A show compositional changes relative to seawater, suggesting an input of fluid from the formation into the borehole. The borehole fluid data, in combination with data on the chemistry of the pore fluids of the sediments at this site, suggest the presence of an aquifer at a depth below 700 mbsf, the depth of a blockage of the hole. Copyright 1992 by the American Geophysical Union.
Year of Publication: 1992
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 20 Geophysics, Applied; Applications; Atlantic Ocean; DIANAUT; DSDP Site 395; DSDP Site 534; Deep Sea Drilling Project; Geochemistry; Hydrochemistry; Hydrogeology; IPOD; Leg 109; Leg 45; Leg 76; Leg 78B; Ocean Drilling Program; Ocean floors; Oceanography; Temperature logging; Well-logging
Coordinates: N224521 N224521 W0460454 W0460454
N282036 N282036 W0752254 W0752254
N224521 N233102 W0445651 W0460454
N220000 N230000 W0430000 W0470000
N224521 N224521 W0460454 W0460454
Record ID: 1992021890
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