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Aubrites and diogenites - Trace element clues to their origin
We have analyzed by RNAA 25 aubrite and 9 diogenite samples for 13 to 29 siderophile, volatile, and lithophile trace elements. Both meteorite classes show a typically igneous siderophile element… Expand
Core formation in the Earth and Shergottite Parent Body (SPB): Chemical evidence from basalts☆
Constraints on processes of core formation in terrestrial planets may be inferred from the abundances of siderophile and chalcophile elements in their mantles. Of particular interest is a comparison… Expand
Moon and Earth : compositional differences inferred from siderophiles, volatiles, and alkalis in basalts
Abstract We have compared RNAA analyses of 18 trace elements in 25 low-Ti lunar and 10 terrestrial oceanic basalts. According to Ringwood and Kesson, the abundance ratio in basalts for most of these… Expand
Ureilites: Trace element clues to their origin
Carbonaceous vein separates from Kenna and Havero, as well as bulk Kenna, were analyzed by RNAA for Ag, Au, Bi, Br, Cd, Cs, Ge, In, Ir, Ni, Pd, Os, Rb, Re, Sb, Se, Te, Tl. U, and Zn. The data are… Expand
Identification of the projectile at the Brent crater, and further considerations of projectile types at terrestrial craters
Abstract Impact melt samples from drill hole B1-59 at the 3.8 km diameter Brent crater (Ontario) have been analysed for siderophile trace elements indicative of meteoritic contamination. Samples from… Expand
Lunar basalts and pristine highland rocks - Comparison of siderophile and volatile elements
The objective of the present paper is to compare pristine highland rocks and low-Ti mare basalts on the basis of all 53 Chicago analyses of these to types of rock. Apart from being of interest in its… Expand
The cytoproct of Paramecium caudatum: structure and function, microtubules, and fate of food vacuole membranes.
The cytoproct or cell anus of Paramecium caudatum was studied, using light optics and electron microscopy, at known times before, during and following food vacuole egestion. This was accomplished by… Expand
Membrane recycling at the cytoproct of Tetrahymena.
Exocytosis and membrane recycling at the cytoproct (cell anus) of Tetrahymena pyriformis were studied using thin-section electron microscopy to identify microfilaments that appear to be active in the channelling and endocyTosis of food vacuole membrane. Expand
Meteoritic material at four Canadian impact craters
Abstract Eleven impact melt and 6 basement rock samples from 4 craters were analyzed by neutron activation for Au, Co, Cr, Fe, Ge, Ir, Ni, Os, Pd, Re and Se. Wanapitei Lake, Ontario: the impact melts… Expand
Trace elements in 59 mostly highland moon rocks
New chemical analyses for up to 26 trace elements, including seldom-determined highly siderophile elements Ir, Os, Re, Au, Pd, and Ge, for 59 lunar samples are reported. Most of these samples are… Expand