Results 251 to 260 of about 45,376 (300)
Some of the next articles are maybe not open access.
SEPM Journal of Sedimentary Research, 1948
ABSTRACT Weathering destroys some heavy minerals at the source so they are not represented in the resulting sediments. Stable minerals are concentrated by weathering and their proportion in the resulting sediments is greatly increased. Exact information on the variety of garnet, hornblende or other members of variable groups should he given whenever ...
openaire +1 more source
ABSTRACT Weathering destroys some heavy minerals at the source so they are not represented in the resulting sediments. Stable minerals are concentrated by weathering and their proportion in the resulting sediments is greatly increased. Exact information on the variety of garnet, hornblende or other members of variable groups should he given whenever ...
openaire +1 more source
Fossil Heavy Mineral Concentrations
Geologische Rundschau, 1973Fossile Schwermineralanreicherungen (Seifen), die wirtschaftlich nicht nutzbar sind, treten gelegentlich in Sandsteinen und Konglomeraten auf. Die Konfiguration, die Mineralzusammensetzung und der vermutete Ablagerungsraum von sechs Schwermineralanreicherungen aus Westdeutschland, die ein unterschiedliches stratigraphisches Alter (Unterdevon, Oberdevon,
openaire +1 more source
Heavy Mineral Correlations and Provenances
SEPM Journal of Sedimentary Research, 1965ABSTRACT The size frequency distributions of heavy minerals can be expressed in terms of the size separation between the modes of each heavy mineral and that of the light minerals (quartz plus feldspar). The modal separation is = log2(ZH/ZL)[1]/[3] ( H/L)[2]/[3]).
openaire +1 more source
Journal of Sedimentary Research, 1960
Describes a method of mounting mineral grains in uncooked Canada balsam, covering with a glass slip, and warming in an oven at 65 to 70 degrees C. for 6 to 8 hours.
openaire +1 more source
Describes a method of mounting mineral grains in uncooked Canada balsam, covering with a glass slip, and warming in an oven at 65 to 70 degrees C. for 6 to 8 hours.
openaire +1 more source
The Sieving Of Heavy Mineral Sands
SEPM Journal of Sedimentary Research, 1985ABSTRACT An investigation has been undertaken of the sieving of natural heavy-mineral sands from a beach placer to determine the effects of the differing shapes of the several mineral types. The measurements agree with an equation derived by Sahu (1965) based on the passage of ellipsoidal grains through a square-sieve opening demonstrating that the ...
openaire +1 more source
Transportation and deposition of heavy mineral
Geological Society of America Bulletin, 1943An attempt to use heavy minerals to evaluate sediment sources in the Middle Rio Grande Valley showed the inadequacy of commonly used methods of representing heavy-mineral compositions. To develop a usable method, six samples from a transverse channel section were studied by quantitative methods.
openaire +1 more source
Influence of reservoir minerals and ethanol on catalytic aquathermolysis of heavy oil
Fuel, 2022Michal Slany +2 more
exaly
STUDIES OF HEAVY DETRITAL MINERALS
Geological Society of America Bulletin, 1950This paper embodies the results of a detailed investigation of the heavy detrital minerals in the sands and gravels in streams, beaches, terraces etc. in a wide variety of localities in South Island, New Zealand. Appropriate techniques using screens, bolting silk, electromagnets, and the centrifuge among other devices have been developed for this and ...
openaire +1 more source