Browsing by Author "Palme H."
- DSpace Home
- →
- Browsing by Author
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by Author "Palme H."
Now showing items 1-20 of 23
-
Kong P.; Palme H. (1999)Individual chondrules, coarse and fine-grained metal, chondrule rims, and matrix samples were separated from the Renazzo chondrite (CR2) and studied by instrumental neutron activation analysis. Both Renazzo chondrule and ...
-
Dreibus G.; Palme H. (1996)The density of the Earth's core (32.5% of the mass of the Earth) is about 8% less than that of pure metallic Fe under similar P, T conditions, requiring the presence of a substantial amount of a light element or light ...
-
Kong P.; Ebihara M.; Palme H. (1999)New data on the chemical composition of bulk samples, and of metallic and nonmagnetic fractions of six CR chondrites (Renazzo, Y793495, PCA91082, EET92042, Acfer 209 and El Djouf 001) are reported. It is shown that volatile ...
-
Kleine T.; Mezger K.; Palme H.; Scherer E.; M?nker C. (2005)The 182Hf-182W isotopic systematics of Ca-Al-rich inclusions (CAIs), metal-rich chondrites, and iron meteorites were investigated to constrain the relative timing of accretion of their parent asteroids. A regression of the ...
-
El Goresy A.; Spettel B.; Zinner E.; Matsunami S.; Palme H.; Lin Y.; Nazarov M. (2002)Inclusion 101.1 from the CV3 carbonaceous chondrite Efremovka is a compact Type A Ca-Al-rich inclusion (CAI) highly enriched in ultrarefractory (UR) oxides. It is the first complete CAI with a UR rare earth element (REE) ...
-
Brenker F.E.; Palme H.; Klerner S. (2000)Carbonaceous chondrites of type 3 (e.g. Allende) are among the most primitive meteorites. They contain components that formed prior to the accretion of a parent asteroid and thus record conditions of the ambient nebular ...
-
Schmitt W.; Palme H.; Wänke H. (1989)Metal/silicate partition coefficients were determined at 1600°C for P, Ga, Ge and W and at 1300°C for P, Fe, Co, Ni, Cu, Ga, Ge, Mo and W. Experiments span a range of two orders-of-magnitude in oxygen fugacity. Good ...
-
Petry C.; Chakraborty S.; Palme H. (2004)Diffusion couple experiments were carried out with San Carlos olivine (Fo90) and NiFe alloys (Ni100, Ni97Fe3, Ni90Fe10) or other olivine compositions (Fo100, Fo25) in order to determine the dependence on temperature, oxygen ...
-
Holzapfel C.; Courtial P.; Dingwell D.B.; Chakraborty S.; Palme H. (2001)In this study, densities of gallium and germanium bearing silicate liquids were determined using the double bob Archimedian method. The silicate base components of the liquids were sodium disilicate (NS2) and anorthite-diopside ...
-
Borisov A.; Palme H. (1996)We report here new data on the solubility of Au in silicate melts of anorthite-diopside eutectic composition at a wide range of oxygen fugacities, from pure oxygen to 10−8 atm, and at a temperature range of 1300 °C to 1480 ...
-
O'Neill H.S.C.; Dingwell D.B.; Borisov A.; Spettel B.; Palme H. (1995)The highly siderophile elements (HSE's: Ru, Rh, Pd, Re, Os, Ir, Pt and Au) and those elements with distribution coefficients between Fe-rich metal and silicate phases which exceed 10⁴. The large magnitude of these distribution ...
-
Borisov A.; Brenker F.; Palme H. (2004)We have determined the stability of rutile and karrooite on the liquidus of pseudobinary silicate melts of anorthite–diopside eutectic composition with, in addition, of up to 32wt% TiO2 at one atm total pressure and at ...
-
Ulff-Moller F.; Rasmussen K.L.; Prinz M.; Palme H.; Spettel B.; Kallemeyn G.W. (1995)Four of the magmatic IVA iron meteorites contain tridymite or clinobronzite-orthobronzitetridymite which are quite unlike silicate assemblages in other iron meteorites. The textures, the bulk chemistry, and the zoning ...
-
Pack A.; Palme H.; Shelley J.M.G. (2005)Iron-poor and refractory lithophile element (RLE) rich forsterite grains occur in all major types of unequilibrated chondrites. In our laser ablation inductively coupled mass spectrometry (LA-ICPMS) minor and trace element ...
-
Hezel D.C.; Palme H.; Nasdala L.; Brenker F.E. (2006)Silica-rich objects are common minor components in ordinary chondrites (OC), occurring as fragments and as chondrules. Their typical paragenesis is orthopyroxene + SiO2 (with bulk SiO2 >65 wt%) and occasionally with ...
-
Pack A.; Yurimoto H.; Palme H. (2004)We have conducted petrographic, chemical and in-situ oxygen isotopic studies of refractory forsterites from unequilibrated ordinary and carbonaceous chondrites as well as an unequilibrated R-chondrite. Refractory forsterites ...
-
Kong P.; Deloule E.; Palme H. (2000)This is a report of the first unambiguous discovery of rare earth elements (REE) in iron sulfide (FeS) in an ordinary chondrite. The content and the pattern of REE as well as the reduced state of the chondrules with the ...
-
Borisov A.; Palme H. (2000)The solubilities of noble metals (NM: Ir, Pd, Au, Pt, and Ru) in FeO-free silicate melts are known from recent experimental work. In this paper, calculations are presented that relate solubilities of NM in FeO-free melts ...
-
Holzheid A.; Palme H.; Chakraborty S. (1997)Solubilities of NiO, Coo and FeO in silicate melts have been determined experimentally as a function of temperature, oxidation state and melt composition. The results -show that Fe, Ni and Co are dissolved as divalent ...
-
Borisov A.; Lahaye Y.; Palme H. (2004)We have determined Pd, Ni, and Fe solubilities in silicate melts of anorthite-diopside eutectic composition with variable TiO2 concentrations, from TiO2-free melts to melts with up to 26 wt% TiO2. The experiments were ...
Now showing items 1-20 of 23