Now showing items 21-30 of 102
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 ...
Silicon in magnetite: High resolution microanalysis of magnetite-ilmenite intergrowths
(Springer-Verlag, 1982-11)
Magnetite-ilmenite “oxidation-exsolution” intergrowths from an original titanomagnetite microphenocryst from an ash flow tuff unit have been studied using conventional transmission electron microscopy and analytical electron ...
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 ...
New density measurements on carbonate liquids and the partial molar volume of the CaCO 3 component
(Springer-Verlag, 2003-12)
Density measurements on nine liquids in the CaCO 3 –Li 2 CO 3 –Na 2 CO 3 –K 2 CO 3 quaternary system were performed at 1 bar between 555 and 969 °C using the double-bob Archimedean method. Our density data on the end-member ...
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 ...
Fatty acids and hydrocarbons in surficial sediments of Lake Huron
(Elsevier, 1979-07)
Fatty acid and hydrocarbon distributions in surficial sediments from ten locations in southern Lake Huron indicate both aquatic and terrigenous recent biological sources of these geolipid materials. Normal alkanoic acids ...
Mineralogical and biological controls on the Fe/Ca and Mn/Ca ratios of lacustrine carbonate allochems
(Elsevier, 1983-01)
The Fe/Ca and Mn/Ca ratios of lacustrine carbonate allochems are primarily controlled by the mineralogy of the carbonate polymorph. However, these ratios are subject to a significant degree of biological control among ...
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 ...