Now showing items 1-10 of 102
A revised model for the density and thermal expansivity of K 2 O-Na 2 O-CaO-MgO-Al 2 O 3 -SiO 2 liquids from 700 to 1900 K: extension to crustal magmatic temperatures
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1997-12)
A revised model for the volume and thermal expansivity of K 2 O-Na 2 O-CaO-MgO-Al 2 O 3 -SiO 2 liquids, which can be applied at crustal magmatic temperatures, has been derived from new low temperature (701–1092 K) density ...
Comparison of garnet-biotite, calcite-graphite, and calcite-dolomite thermometry in the Grenville Orogen; Ontario, Canada
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-02)
The Elzevir Terrane of the Grenville Orogen in southern Ontario contains metapelites and abundant graphitic marbles that were regionally metamorphosed from the upper greenschist to upper amphibolite facies. Comparative ...
Magmatic and hydrothermal inclusions in carbonatite of the Magnet Cove Complex, Arkansas
(Springer-Verlag, 1977-08)
The carbonatite at Magnet Cove, Arkansas, USA contains a great variety and abundance of magmatic and hydrothermal inclusions that provide an informative, though fragmentary, record of the original carbonatite melt and of ...
Pyrometamorphism and partial melting of shales during combustion metamorphism: mineralogical, textural, and chemical effects
(Springer-Verlag, 1992-12)
Eocene shales metamorphosed by a naturally ignited coal seam in the Powder River Basin, Wyoming record a continuum of mineralogic and textural changes from relatively unaltered shale to melt developed during pyrometamorphism. ...
Sources, degradation and recycling of organic matter associated with sinking particles in Lake Michigan
(Elsevier, 1993-01)
Sediment trap material collected at five depths from two locations in Lake Michigan has been studied to determine the sources of particulate organic matter and the early diagenetic changes which occur during sinking of ...
Si-Al ordering in nephelines
(Springer-Verlag, 1971-06)
Different degrees of Si-Al ordering are demonstrated to exist in nepheline on the basis of five crystal structure refinements on specimens with different geologic origins and laboratory treatments. Disorder increases in ...
The hydrothermal component in ferromanganese nodules from the southeast Pacific Ocean
(Elsevier, 1989-06)
Statistical analyses of geochemical data from ferromanganese nodule samples representing a broad area of the southeast Pacific Ocean indicate nodule compositions are controlled by four factors: (1) suboxic diagenesis; (2) ...
Sr/Mg ratios of modern marine calcite: Empirical indicators of ocean chemistry and precipitation rate
(Elsevier, 1992-05)
Holocene biotic and abiotic marine calcite have a similar range of Mg contents (0 to 22 and 4 to 21 mol% MgCO3, respectively), yet biotic calcite has Sr2+ concentrations that are consistently 1250 ppm higher than those of ...
Genesis and solvus relations of submicroscopically intergrown paragonite and phengite in a blueschist from northern California
(Springer-Verlag, 1991-01)
Electron microbeam techniques have been used to examine submicroscopically intergrown paragonite, phengite and chlorite from the South Fork Mountain Schist of the Franciscan Terrane of northern California, which was subjected ...