Now showing items 11-20 of 61
Calculation and application of clinopyroxene-garnet-plagioclase-quartz geobarometers
(Springer-Verlag, 1988-09)
Recently published thermodynamic and experimental data in a variety of chemical systems have been evaluated to derive Gibbs free energies for hedenbergite and pyrope. These were used to calculate the geobarometric equilibria
Hydrocarbons and fatty acids in two cores of Lake Huron sediments
(Elsevier, 1980-08)
Compositions of aliphatic hydrocarbons and of fatty acids were analyzed in two half-meter cores of postglacial Lake Huron sediment. One core represents a continuous record of the past 450 yr of sediment accumulation; the ...
Nd-Sr isotope composition of lower crustal xenoliths — Evidence for the origin of mid-tertiary felsic volcanics in Mexico
(Springer-Verlag, 1988-05)
Isotopic data were collected on lower crustal xenoliths to constrain the Mexican lower crust as source material for the mid-Tertiary Sierra Madre Occidental, which is one of the largest silicic volcanic piles known. The ...
Detection of bone preservation in archaeological and fossil samples
(Elsevier, 1989)
Several methods for assessing the preservation of the organic and inorganic components of bone are discussed. Aspects of bone composition (i.e. specific trace element concentrations and stable isotope ratios) provided ...
Synthetic fluid inclusions in natural quartz. IV. Chemical analyses of fluid inclusions by SEM/EDA: Evaluation of method
(Elsevier, 1988-05)
The compositions of individual synthetic fluid inclusions in the systems NaCl-KCl, NaCl-CaCl2 and NaCl-KCl-CaCl2 have been semi-quantitatively determined by energy dispersive analysis of precipitates produced during thermal ...
A geochemical model for sulfide paragenesis and zoning in the Cu---Fe---As---S system (Tsumeb, South West Africa/Namibia)
(Elsevier, 1984-12-20)
The Cu-bearing hypogene mineralization at Tsumeb, South West Africa/Namibia, is interpreted to have resulted from the interaction of hot circulating Cu-rich saline solutions and host dolomites. Fluids attending formation ...
Diagenetic controls of phosphorus in outer continental-shelf sediments from the Gulf of Mexico
(Elsevier, 1981)
A sequential extraction scheme was used to isolate organic P and inorganic P associated with various forms of Fe, Mn and major cations in two low-carbonate cores from the outer Texas shelf, in which sulfate reduction is ...
Fluid inclusion chemistry in the exploration for Mississippi Valley-type deposits: an example from East Tennessee, U.S.A.
(Elsevier, 1987)
Scanning electron microscopy and energy dispersive analysis of fluid inclusion decrepitates in sparry dolomite cements associated with sphalerite mineralization in the Mascot-Jefferson City Mississippi Valley-type district ...
The formation of garnet in olivine-bearing metagabbros from the Adirondacks
(Springer-Verlag, 1982-12)
A regional study of olivine-bearing metagabbros in the Adirondacks has permitted testing of the P(pressure)-T(temperature)-X(composition) dependence of garnet-forming reactions as well as providing additional regional ...