Now showing items 21-30 of 50
Fluid inclusion gas chemistry in east Tennessee Mississippi Valley-type districts: Evidence for immiscibility and implications for depositional mechanisms
(Elsevier, 1992-01)
Analyses of fluid inclusion gases from Mississippi Valley-type districts in east Tennessee reveal the presence of several distinct aqueous solutions and vapors that were part of the mineralizing process. Inclusion contents ...
A sulfur isotopic profile through the troodos ophiolite, Cyprus: Primary composition and the effects of seawater hydrothermal alteration
(Elsevier, 1994-04)
The sulfide mineralogy, sulfur contents, and sulfur isotopic compositions were determined for a section through the Troodos ophiolite, as represented by drillcore from Holes CY1A, CY2A, and CY4, plus selected outcrops, ...
Strontium, boron, oxygen, and hydrogen isotope geochemistry of brines from basal strata of the Gulf Coast sedimentary basin, USA
(Elsevier, 1993-05)
Significant spatial heterogeneities exist in the stable isotopic composition of saline formation waters from reservoirs of the Smackover Formation (Upper Jurassic). We focused on the southwest Arkansas shelf, a structurally ...
Changes in organic carbon stable isotope ratios across the K/T boundary: global or local control?
(Elsevier, 1992-09-25)
A global shift in carbonate carbon [delta]13C-values from heavier values in the Maastrichtian to lighter values in the early Danian indicates recycling of isotopically light organic carbon to inorganic carbon reservoirs ...
Preservation of elemental and isotopic source identification of sedimentary organic matter
(Elsevier, 1994-06-01)
The amount and type of organic matter in the sediments of lakes and oceans contribute to their paleoenvironmental and paleoclimatological records. Only a small fraction of the initial aquatic organic matter survives ...
Origin and evolution of formation waters, Alberta Basin, Western Canada sedimentary Basin. I. Chemistry
(Elsevier, 1990)
Inorganic chemical analyses and short-chain aliphatic acid content are used to interpret the origin and compositional evolution of formation waters in the Alberta portion of the Western Canada Sedimentary Basin. Forty-three ...
Rb-Sr dating of sphalerites from Mississippi Valley-type (MVT) ore deposits
(Elsevier, 1993-01)
Mississippi Valley-type (MVT) ore deposits are epigenetic carbonate-hosted Pb-Zn deposits that contain galena, sphalerite, fluorite, barite, dolomite, calcite, and quartz. Although they are thought to form from basinal ...