Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Eric J. Essene"'
Publikováno v:
International Kimberlite Conference Extended Abstracts: 1998.
Publikováno v:
Ore Geology Reviews. 65:733-748
Electron probe microanalysis and microscopy is a widely used modern analytical technique primarily for quantifying chemical compositions of solid materials and for mapping or imaging elemental distributions or surface morphology of samples at microme
Publikováno v:
Journal of Petrology. 55:103-131
Tectonic blocks of high-grade metamorphic rock hosted by the Franciscan me¤ lange commonly preserve textural and geochemical evidence for metasomatism and blueschist-facies overprinting within a subduction zone. These exhumation events can obscure i
Publikováno v:
Journal of Asian Earth Sciences. 63:197-205
Three metapelite samples from the Aksu blueschist terrane, Xinjiang, China, were dated by the 40 Ar/ 39 Ar method on separated phengite grains, obtaining plateau ages in the range of 741−757 Ma. In contrast, the measured Rb and Sr isotope data for
Publikováno v:
International Geology Review. 54:1013-1030
Subduction zones are one of the most characteristic features of planet Earth. Convergent plate junctions exert enormous influence on the formation and recycling of continental crust, and they are also responsible for major mineral resources and earth
Autor:
Eric J. Essene, Allan H. Treiman
Publikováno v:
Geochimica et Cosmochimica Acta. 75:5324-5335
Martian meteorite Allan Hills (ALH) 84001 contains sub-micron magnetite grains, suggested to be of biogenic origin, in its globules of Fe–Mg carbonate mineral. There is disagreement on whether the low Mg content of the magnetite could only arise fr
Publikováno v:
Geochimica et Cosmochimica Acta. 73:3393-3409
The heat capacity (Cp) of two synthetic spessartine samples (Sps) was measured on 20–30 mg-size samples in the temperature range 2–864 K by relaxation calorimetry (RC) and differential scanning calorimetry (DSC). The polycrystalline spessartine s
Autor:
Douglas Rumble, Allan H. Treiman, C. M. O'd. Alexander, Molly C. McCanta, M. D. Dyar, Eric J. Essene
Publikováno v:
Geochimica et Cosmochimica Acta. 72:5757-5780
The R chondrite meteorite LaPaz Icefield (LAP) 04840 is unique among metamorphosed, non-carbonaceous chondrites in containing abundant OH-bearing silicate minerals: ~13% ferri-magnesiohornblende and ~0.4% phlogopite by volume. Other minerals include
Publikováno v:
European Journal of Mineralogy. 20:745-755
Understanding how Ti partitions between the Si and Zr sites in zircon is crucial for developing the Ti-in-zircon geothermometer. Energies calculated using quantum-mechanical methods (VASP, CASTEP, Dmol 3 , Crystal) were used to compare the relative f
Publikováno v:
Contributions to Mineralogy and Petrology. 156:709-720
The accepted standard state entropy of titanite (sphene) has been questioned in several recent studies, which suggested a revision from the literature value 129.3 ± 0.8 J/mol K to values in the range of 110–120 J/mol K. The heat capacity of titani