Published 1986 | Version v1
Journal article Metadata-only

Ancient rocks of the Earth

Creators

Description

Isotope data on the ancient rocks of the Earth crust, obtained as a result of isotope-geochronological studies, carried out lately, are presented. Ultrabasic-basic composition of the ancient crust is confirmed by istope-geochemical and geochronological investigations. The earliest intrusions of tonalite composition are 3.65+-0.05 milliard years old. Later, granite-greenstone and granulite-gneissic regions were formed. The earliest global epoch of metamorphism originated 3.0-2.8 milliard years ago. The data presented are based on the study of isotope ratios 87Sr/86Sr, 143Nd/144Nd, Rb/Sr, Sm/Nd, U/Pb, 40Ar/39Ar, etc

Additional details

Additional titles

Subtitle (English)
Isotope data
Original title (Russian)
Древнейшие породы Земли
Original subtitle (Russian)
Izotopnye dannye.
Augmented title (English)
Radioisotopes: "8"7Sr, "8"6Sr, "1"4"3Nd, "1"4"4Nd, "3"9Ar, "4"0Ar, rubidium isotopes, "2"0"7Pb, "2"0"6Pb, "2"3"5U, "2"3"8U

Publishing Information

Journal Title
Vestn. Akad. Nauk SSSR
Journal Issue
no.4
Series
Vestn. Akad. Nauk SSSR.
ISSN
0002-3442
CODEN
VANSA

INIS

Country of Publication
Russian Federation
Country of Input or Organization
USSR
INIS RN
18012332
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
EARTH CRUST; ISOTOPE DATING; ISOTOPE RATIO; METAMORPHISM; PETROGENESIS; RADIOISOTOPES; ROCKS
Descriptors DEC
AGE ESTIMATION; ISOTOPES