Published July 1982 | Version v1
Book Metadata-only

40Ar-39Ar age determination of rocks by means of neutron irradiation

Creators

  • 1. Tokyo Univ. (Japan). Faculty of Science

Description

Fast-neutron irradiation was made in the Japanese Material Testing Reactor (JMTR) to determine the age of several rocks by measuring a ratio of 40Ar to 39Ar produced from the reaction of 39K(n,p) 39Ar. The specimens of the following rocks were examined; volcanic rocks in the vicinity of the northern Chile in South America, meteorites in the Antarctica, rocks in Shimanto district in Kochi Prefecture, rocks in the vicinity of Mineoka in Boso Peninsula and rocks in the vicinity of Kofu city. These specimens were irradiated together with the standard specimens, and after the cooling for 2 or 3 months, the Ar analyses were carried out to estimate the age of the rocks. The estimated values of the age of all the rocks are discussed in comparison with the other reported data. (Asami, T.)

Additional details

Additional titles

Original title (Japanese)
Kyodo riyo kenkyu keika hokokusho; Tohoku Daigaku Kinzoku Zairyo Kenkyujo Huzoku Zairyo Shikenro Riyo Shisetsu.

Publishing Information

Publisher
Oarai Branch of Research Inst. for Iron, Steel and Other Metals.
Imprint Place
Oarai, Ibaraki (Japan)
Imprint Title
Progress report of researches by joint use; Oarai Branch, Research Institute for Iron, Steel and Other Metals, Tohoku Univ.
Imprint Pagination
214 p.
Journal Page Range
p. 193-198.

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
15063519
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Progress Report
Descriptors DEI
ANTARCTIC REGIONS; ARGON 39; ARGON 40; CALIBRATION STANDARDS; CHILE; CHONDRITES; IGNEOUS ROCKS; ISOTOPE DATING; JAPAN; NEUTRON REACTIONS; POTASSIUM 39 TARGET; PROTONS; SAMPLE PREPARATION; STRATIFICATION
Descriptors DEC
AGE ESTIMATION; ARGON ISOTOPES; ASIA; BARYON REACTIONS; BARYONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CATIONS; CHARGED PARTICLES; DEVELOPED COUNTRIES; DEVELOPING COUNTRIES; ELEMENTARY PARTICLES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FERMIONS; HADRON REACTIONS; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; IONS; ISOTOPES; LIGHT NUCLEI; METEORITES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; NUCLEONS; POLAR REGIONS; RADIOISOTOPES; ROCKS; SOUTH AMERICA; STABLE ISOTOPES; STONE METEORITES; TARGETS; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
Imprint:Kyodo riyo kenkyu keika hokokusho; Tohoku Daigaku Kinzoku Zairyo Kenkyujo Huzoku Zairyo Shikenro Riyo Shisetsu.