Chemical composition and sulfur-isotope ratios in DSDP Legs 69-and 70


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

Related Identifier
Metadata Access
Creator Belyi, V M; Migdisov, Areg A; Barskaja, N V; Grinenko, V A
Publisher PANGAEA
Publication Year 1983
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (-86.410W, 0.567S, -83.730E, 1.613N); North Pacific/MOUND; North Pacific
Temporal Coverage Begin 1979-11-20T00:00:00Z
Temporal Coverage End 1979-12-04T00:00:00Z