Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Aurora Pun"'
Publikováno v:
Meteoritics & Planetary Science. 48:1823-1840
This thermal annealing experiment at 1000 K for up to 167 h used a physical mixture of vapor phase-condensed magnesiosilica grains and metallic iron nanograins to test the hypothesis that a mixture of magnesiosilica grains and an Fe-source would lead
Publikováno v:
Chemical Physics Letters. 458:355-358
A small number of amorphous nanograins with a silica-free, iron–alumina composition was formed during laboratory condensation of a low-silica Al–Fe–SiO–H 2 –O 2 vapor. Very rapid cooling of the vapor created conditions that were conducive t
Publikováno v:
Icarus. 195:493-503
Condensates produced in a laboratory condensation experiment of a refractory Ca–SiO–H2–O2 vapor define four specific and predictable deep metastable eutectic calciosilica compositions. The condensed nanograins are amorphous solids, including th
Autor:
Pierre Rochette, Joseph A. Nuth, Frans J. M. Rietmeijer, James M. Karner, J. Marfaing, Aurora Pun
Publikováno v:
American Mineralogist. 91:1688-1698
Vapors of Al-Fe-SiO-O2-H2 having two different compositions produced ferroaluminosilica grains as a function of agglomeration and fusion along mixing lines in the Al2O3-FeO-SiO2 system that are defined by the predictable, deep metastable eutectic (DM
How Does Earth Work? Physical Geology and the Process of Science : Pearson New International Edition
Autor:
Gary Smith, Aurora Pun
For introductory courses in physical geology. Encouraging students to observe, discover, and visualise, How Does Earth Work engages students with an inquiry-based learning method that develops a solid interpretation of introductory geology. Like geol
Publikováno v:
Geological Society of America Bulletin. 111:590-606
Tertiary diatremes of the Navajo volcanic field brought a wide variety of Proterozoic xenoliths to the surface of the Colorado Plateau. Examination of crustal xenoliths from the Navajo volcanic field diatremes permits reconstruction of Proterozoic pr
Publikováno v:
Meteoritics & Planetary Science. 33:835-851
A large hand sample and numerous polished thin sections, made from the hand sample, of the Ka- poeta howardite and its many diverse lithic clasts were studied in detail by optical microscopy and electron microprobe techniques in an attempt to underst
Publikováno v:
Geochimica et Cosmochimica Acta. 61:5089-5097
In an attempt to elucidate the relationship between the cumulate eucrites and the noncumulate (main series) eucrites, we have examined the trace-element systematics of plagioclase grains that coexist with inverted pigeonites of the cumulate eucrites.
Autor:
James J. Papike, Aurora Pun
Publikováno v:
American Mineralogist. 81:1438-1451
In unequilibrated eucrites, pyroxene is a sensitive recorder of variables that affect their crystallization histories. Therefore, major, minor, and trace element systematics of pyroxene were evaluated from several unequilibrated eucrites and an equil
Autor:
James J. Papike, Aurora Pun
Publikováno v:
Geochimica et Cosmochimica Acta. 59:2279-2289
We have examined the partitioning of selected minor and trace elements in exsolved pyroxenes from cumulate eucrites by secondary ion mass spectrometry (SIMS). Solid-solid partition coefficients (D's) for Al, Cr, Ti, seven REEs, Sr, Y, and Zr have bee