Now showing items 31-40 of 82
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, ...
A simple and inexpensive method of hydrogen isotope and water analyses of minerals and rocks based on zinc reagent
(Elsevier, 1993-01-05)
A new method based on Zn reagent for the quantitative conversion H2O to H2 for the hydrogen isotope analysis of hydrous minerals and whole rocks has been developed. Analyses by this method are of comparable accuracy and ...
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 ...
Electrochemical measurements and thermodynamic calculations of redox equilibria in pallasite meteorites: Implications for the eucrite parent body
(Elsevier, 1990-06)
The intrinsic oxygen fugacity (IOF) of olivine separates from the Salta, Springwater, and Eagle Station pallasites was measured between 850 and 1150[deg]C using oxygen-specific solid zirconia electrolytes at 105 Pa. The ...
Stable isotope compositions of fluid inclusions in biogenic carbonates
(Elsevier, 1994-01)
Measurements have been made of hydrogen, carbon, and oxygen isotope compositions of inclusion waters and CO2 extracted from eleven species of modern marine and freshwater skeletal carbonates. The samples were collected in ...
Gas buildup in Lake Nyos, Cameroon: The recharge process and its consequences
(Elsevier, 1993-05)
The gases dissolved in Lake Nyos, Cameroon, were quantified recently (December 1989 and September 1990) by two independent techniques: in-situ measurements using a newly designed probe and laboratory analyses of samples ...
Differential unroofing within the central metasedimentary Belt of the Grenville Orogen: constraints from 40 Ar/ 39 Ar thermochronology
(Springer-Verlag, 1992-04)
An 40 Ar/ 39 Ar thermochronological investigation of upper greenschist to granulite facies gneiss, amphibolite and marble was conducted in the Central Metasedimentary Belt (CMB), Ontario, to constrain its cooling history. ...
Oxygen and hydrogen isotope evidence for meteoric water infiltration during mylonitization and uplift in the Ruby Mountains-East Humboldt Range core complex, Nevada
(Springer-Verlag, 1992-06)
Stable isotope analyses of rocks and minerals associated with the detachment fault and underlying mylonite zone exposed at Secret Creek gorge and other localities in the Ruby-East Humboldt Range metamorphic core complex ...
Imprint of meteoric water on the stable isotope compositions of igneous and secondary minerals, Kap Edvard Holm Complex, East Greenland
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1995-08)
Hydrogen and oxygen isotope analyses have been made of hydrous minerals in gabbros and basaltic xenoliths from the Eocene Kap Edvard Holm intrusive complex of East Greenland. The analyzed samples are of three types: (1) ...