Journal ArticleDOI
Uranium and barium in stone meteorites
Hiroshi Hamauchi,Hiroshi Hamauchi,George W Reed,George W Reed,Anthony Turkevich,Anthony Turkevich +5 more
TLDR
In this article, the uranium and barium contents of some meteorites (4 chondrites and 1 achondrite), a basalt and a dunite have been determined by neutron activation.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1957-01-01. It has received 134 citations till now. The article focuses on the topics: Uranium & Achondrite.read more
Citations
More filters
Journal ArticleDOI
Time Differences in the Formation of Meteorites as Determined from the Ratio of Lead-207 to Lead-206
TL;DR: Measurements of the lead isotopic composition and the uranium, thorium, and lead concentrations in meteorites were made in order to obtain more precise radiometric ages of these members of the solar system.
Journal ArticleDOI
On the origin of hypersthene chondrites: Ages and shock effects of black chondrites
TL;DR: In this article, the origin and history of the Hypersthene chondrite were studied using noble gas content and shock and reheating by X-ray diffraction, and the results showed that the noble gas was positively correlated with the temperature of the hypersthene.
Journal ArticleDOI
Relative Contributions of Uranium, Thorium, and Potassium to Heat Production in the Earth.
TL;DR: Data from a wide variety of igneous rock types show that the ratio of potassium to uranium is approximately 1 X 104, which suggests that the value of K/U ≈1 X 104 is characteristic of terrestrial materials and is distinct from thevalue of 8 X 104 found in chondrites.
Journal ArticleDOI
The formation of the sun and planets
TL;DR: In this article, a model of the stellar activity throughout galactic history is devised, and its parameters are determined by the abundances of the uranium and thorium isotopes, and the time interval between the start of condensation and the formation and thermal insulation of the meteorite bodies is less than 6 × 106 years.
Journal ArticleDOI
Limitations on the composition of the upper mantle
TL;DR: In this paper, the isotopic composition of strontium and of the concentration of K, Rb, Cs, U, Ba, and Cs were determined for a chondritic earth model.
References
More filters
Journal ArticleDOI
The composition of the stone meteorites and the origin of the meteorites
Harold C. Urey,Harmon Craig +1 more
TL;DR: In this article, a study has been made of some 350 chemical analyses of stone meteorites available in the literature, and criteria have been applied in an attempt to select those which are more reliable.
Journal ArticleDOI
Age of meteorites and the earth
TL;DR: In this paper, it was found that earth lead meets the requirements of this definition and it is therefore believed that the age for the earth is the same as for meteorites, which is the time since the earth attained its present mass.
Journal ArticleDOI
The chemical composition of some stony meteorites
TL;DR: In this article, the existence of two main groups among the chondrites, the H and L groups of Urey and Craig (1953), with 28 and 22 per cent total iron, respectively, are presented.
Related Papers (5)
Determinations of concentrations of heavy elements in meteorites by activation analysis
Determination of alkali metals in meteorites by a distillation process
George Edwards,Harold C. Urey +1 more