Now showing items 281-290 of 307
Occurrence of wide-chain Ca-pyriboles as primary crystals in the Salton Sea Geothermal Field, California, USA
(Springer-Verlag, 1986-09)
Amphiboles and pyroxenes occurring in the Salton Sea Geothermal Field were found to contain coherent intergrowths of chain silicates with other than double and single chain widths by using transmission and analytical ...
Geochemistry of eolian dust in Pacific pelagic sediments: Implications for paleoclimatic interpretations
(Elsevier, 1991-08)
Geochemical data (REEs, Th, Sc) were determined for the operationally defined eolian dust (ODED) fraction (n = 57) from the north and equatorial Pacific Ocean. Paleoclimate studies commonly have assumed that this sediment ...
Phyllosilicates in hydrothermally altered basalts from DSDP Hole 504B, Leg 83 — a TEM and AEM study
(Springer-Verlag, 1992-10)
Phyllosilicates occurring as replacements of olivine, clinopyroxene and interstitial materials and as veins or fracture-fillings in hydrothermally altered basalts from DSDP Hole 504B, Leg 83 have been studied using ...
An analytical electron microscopic study of a pyroxene-amphibole intergrowth
(Springer-Verlag; Springer-Verlag GmbH & Co. KG, 1981-06)
Samples of a garnet granulite from the mafic border units of the Lake Chatuge, Georgia alpine peridotite body were found to contain lamellar intergrowths of a pargastic amphibole in augite having the typical appearance of ...
Sources and deposition of organic matter in Cretaceous passive margin deep-sea sediments: a synthesis of organic geochemical studies from Deep Sea Drilling Project Site 603, outer Hatteras Rise
(Elsevier, 1989-05)
The results of organic geochemical studies of rock samples from Cretaceous strata at Site 603 on the outer Hatteras Rise are reviewed and integrated with their lithostratigraphic information. Although most of the strata ...
TEM and AEM constraints on the origin and significance of chlorite-mica stacks in slates: an example from Central Wales, U.K.
(Elsevier, 1994-08)
Chlorite-mica stacks (grains of intergrown chlorite and white mica) in a matrix of fine-grained white mica and chlorite have been studied using XRD, SEM, EMPA, TEM and AEM methods. The stacks occur in a weakly cleaved ...
A simple energy balance model of ice segregation
(Elsevier, 1980-05)
Step functions of normal frost front advance in dry and wet soils are reviewed and used to introduce the geometry of the soil frost system. An energy balance equation at the initiation of ice lens growth is developed using ...
The earliest atmosphere of the Earth
(Elsevier, 1982-04)
This paper examines, from the point of view of atmospheric physics, the possibility that the initial complement of volatiles in the material that formed the Earth was very much larger than that remaining. The escape of ...