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Debrabant, Pierre; Chamley, Hervè; Foulon, Janine (1984): (Appendix) Bulk inorganic chemistry at DSDP Leg 77 Holes. PANGAEA,, Supplement to: Debrabant, P et al. (1984): Paleoenvironmental implications of mineralogic and geochemical data in the Western Florida Straits (Leg 77, Deep Sea Drilling Project). In: Buffler, RT; Schlager, W; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 77, 377-396,

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Clay mineralogic and inorganic geochemical investigations of Cretaceous and Cenozoic sediments of the western Gulf of Mexico lead to the following main conclusions. (1) Transition of lowermost Cretaceous continental to marine sedimentation is marked by a clay evaporitic stage, north of the Campeche Escarpment. (2) Existence of combined mineralogic and geochemical stratigraphy allows us to propose correlations between Sites 535 and 540, especially for the Albian. (3) Predominance of detrital clay assemblages is indicative of hot and variably humid continental climate until the early late Cenozoic. (4) Tectonic destabilization of the margins of Gulf of Mexico occurred at different periods, especially until the middle Cretaceous, with a mixed erosion of rocks and soils and temporary oxidized conditions of deposition. (5) Successive developments of confined perimarine basins occurred from the earliest Cretaceous until the Miocene, chiefly in the Florida area. The sources of inorganic materials were chiefly situated on the east of the studied area until the late Tertiary and after that in the Mississippi River basin. (6) Occasionally, volcanic activity influenced the clay mineralogy and mainly the geochemistry, and possibly contributed to the rather strong magnesian character of the deposition until the late Paleogene. (7) The argillaceous diagenesis is weak; variability of the carbonate diagenesis is marked by the relation Sr = f(CaO) and chiefly depends on the depth of burial, the clay content, the porosity, and the geologic age.
Median Latitude: 23.829875 * Median Longitude: -84.878200 * South-bound Latitude: 23.708000 * West-bound Longitude: -85.460300 * North-bound Latitude: 23.933500 * East-bound Longitude: -84.370800
Date/Time Start: 1980-12-29T00:00:00 * Date/Time End: 1981-01-19T00:00:00
Minimum Elevation: -3450.0 m * Maximum Elevation: -2742.0 m
77-535 * Latitude: 23.708000 * Longitude: -84.516200 * Date/Time: 1980-12-29T00:00:00 * Elevation: -3450.0 m * Penetration: 714 m * Recovery: 504.6 m * Location: Gulf of Mexico/BASIN * Campaign: Leg77 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 704.5 m cored; 9.5 m drilled; 71.6 % recovery
77-537 * Latitude: 23.933500 * Longitude: -85.460300 * Date/Time: 1981-01-11T00:00:00 * Elevation: -3123.0 m * Penetration: 225 m * Recovery: 15.9 m * Location: Gulf of Mexico/KNOLL * Campaign: Leg77 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 144.5 m cored; 9 m drilled; 11 % recovery
77-538A * Latitude: 23.849200 * Longitude: -85.165500 * Date/Time: 1981-01-14T00:00:00 * Elevation: -2742.0 m * Penetration: 332.5 m * Recovery: 137.6 m * Location: Gulf of Mexico/KNOLL * Campaign: Leg77 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 36 cores; 332.5 m cored; 0 m drilled; 41.4 % recovery
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5Sample code/labelSample labelDebrabant, PierreODP sample designation
6Silicon dioxideSiO2%Debrabant, Pierresee reference(s)
7Aluminium oxideAl2O3%Debrabant, Pierresee reference(s)
8Calcium oxideCaO%Debrabant, PierreSpectrophotometry
9Magnesium oxideMgO%Debrabant, PierreSpectrophotometry
10Sodium oxideNa2O%Debrabant, PierreSpectrophotometry
11Potassium oxideK2O%Debrabant, PierreSpectrophotometry
12Titanium dioxideTiO2%Debrabant, PierreColorimetry
13Iron oxide, Fe2O3Fe2O3%Debrabant, PierreColorimetry
14ManganeseMnmg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
15ZincZnmg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
16LithiumLimg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
17NickelNimg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
18ChromiumCrmg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
19StrontiumSrmg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
20CobaltComg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
21CopperCumg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
22LeadPbmg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
23VanadiumVmg/kgDebrabant, PierreAtomic absorption spectrometry (AAS)
2905 data points

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