10.1594/PANGAEA.816533
Belyi, V M
V M
Belyi
Migdisov, Areg A
Areg A
Migdisov
Barskaja, N V
N V
Barskaja
Grinenko, V A
V A
Grinenko
Chemical composition and sulfur-isotope ratios in DSDP Legs 69-and 70
PANGAEA
1983
Drilling/drill rig
Leg69
Leg70
Glomar Challenger
Deep Sea Drilling Project (DSDP)
1979-11-20T00:00:00/1979-12-04T00:00:00
Supplementary Publication Series of Datasets
10.2973/dsdp.proc.69.135.1983
2 datasets
application/zip
Creative Commons Attribution 3.0 Unported
As part of the geochemical-petrological study of basalts recovered from DSDP Hole 504B (Leg 70) on the southern flank of the Costa Rica Rift, we investigated specially the relationships between the distribution and isotopic composition of sulfur of scattered and vein sulfides on the one hand, and the observed pattern and processes of secondary alterations on the other. The following groups of observations are essential: (1) variations in the contents and isotopic composition of sulfur of different forms of sulfides are clearly interrelated and are observed solely in porous horizons established on the basis of detailed geophysical experiments; (2) the enrichment of sulfides in the light sulfur isotope decreases from the upper to the lower horizons, and within horizons in the direction of the less-altered rock; (3) the increase of d34S values of scattered sulfides in individual permeable zones parallels a decrease in the degree of iron oxidation in the contents of crystallization water, and in the concentrations of Mg, K, and Li in the rock.
Supplement to: Belyi, V M; Migdisov, Areg A; Barskaja, N V; Grinenko, V A (1983): Sulfur-isotope composition of hydrothermal sulfides from Hole 504B, Deep Sea Drilling Project Leg 70, Costa Rica Rift. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 69, 619-627
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0.5667
1.6132
North Pacific/MOUND
North Pacific