Now showing items 11-20 of 82
Mineral inclusions in pyrope crystals from Garnet Ridge, Arizona, USA: implications for processes in the upper mantle
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-05)
Mineral inclusions in pyrope crystals from Garnet Ridge in the Navajo Volcanic Field on the Colorado Plateau are investigated in this study with emphasis on the oxide minerals. Each pyrope crystal is roughly uniform in ...
The effect of Al 3+ , Fe 3+ , and Ti 4+ on the configurational heat capacities of sodium silicate liquids
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-12)
The heat capacities of 29 glasses and supercooled liquids in the Na 2 O-SiO 2 , Na 2 O-Al 2 O 3 -SiO 2 , Na 2 O-(FeO)-Fe 2 O 3 -SiO 2 , and Na 2 O-TiO 2 -SiO 2 systems were measured in air from 328 to 998 K with a differential ...
Lacustrine organic geochemistry--an overview of indicators of organic matter sources and diagenesis in lake sediments
(Elsevier, 1993-09)
The factors affecting the amounts and types of organic matter in lacustrine sediments are summarized in this review, and synthesis, of published studies. Biota living in the lake and in its watershed are the sources of the ...
Ultra-high temperatures from oxygen isotope thermometry of a coesite-sanidine grospydite
(Springer-Verlag, 1992-11)
The oxygen isotope compositions of coesite, sanidine, kyanite, clinopyroxene and garnet were measured in an ultra-high pressure-temperature grospydite from the Roberts Victor kimberlite, South Africa. The δ 18 O values ...
Organic geochemical study of mineralization in the Keweenawan Nonesuch Formation at White Pine, Michigan
(Elsevier, 1990)
The role of organic matter in the formation of metal ores has been investigated in the Nonesuch Formation at White Pine, Michigan. Organic matter in mineralized strata was characterized by isotopic, molecular and ...
Regional retrograde alteration of sub-greenschist facies chlorite to smectite
(Springer-Verlag, 1994-01)
Dioctahedral smectite is present as a retrograde alteration product of chlorite in Permian-Triassic red slates of the Malaguide Complex in Sierra de Espuña (Betic Cordillera). Mineral assemblages and textures, illite ...
Formation waters from Mississippian-Pennsylvanian reservoirs, Illinois basin, USA: Chemical and isotopic constraints on evolution and migration
(Elsevier, 1993-02)
We have analyzed a suite of seventy-four formation-water samples from Mississippian and Pennsylvanian carbonate and siliciclastic strata in the Illinois basin for major, minor, and trace element concentrations and for ...
Stable isotope geochemistry and phase equilibria of coesite-bearing whiteschists, Dora Maira Massif, western Alps
(Springer-Verlag, 1993-05)
Peak metamorphic temperatures for the coesite-pyrope-bearing whiteschists from the Dora Maira Massif, western Alps were determined with oxygen isotope thermometry. The δ 18 O( smow ) values of the quartz (after coesite) ...
The partial molar volume, thermal expansivity, and compressibility of H 2 O in NaAlSi 3 O 8 liquid: new measurements and an internally consistent model
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1997-10)
The molar volumes of 19 hydrous albitic liquids (1.9 to 6.1 wt% H 2 O total ) were determined at one bar and 505–765 K. These volume data were derived from density measurements on hydrous glasses at 298 K, followed by ...