ISOTOPIC COMPOSITION OF HELIUM IN ECLOGITE FROM THE DABIE MOUNTAINS, CENTRAL CHINA AND ITS GEOLOGICAL SIGNIFICANCE

Authors
DU JG ZHANG JZ SUN ML ZHANG YL
Citation
Jg. Du et al., ISOTOPIC COMPOSITION OF HELIUM IN ECLOGITE FROM THE DABIE MOUNTAINS, CENTRAL CHINA AND ITS GEOLOGICAL SIGNIFICANCE, Chinese Science Bulletin, 43(16), 1998, pp. 1362-1366
Citations number
13
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Chinese Science Bulletin → ACNP
ISSN journal
10016538
Volume
43
Issue
16
Year of publication
1998
Pages
1362 - 1366
Database
ISI
SICI code
1001-6538(1998)43:16<1362:ICOHIE>2.0.ZU;2-5
Abstract
Isotopic geochemical characteristics of helium in garnet and omphacite of eclogite in the Dabie Mountains are discussed. Concentrations of H e-3 and He-4 in garnet and omphacite are 3.9 x 10(-14)-24.0 x 10(-14) and 0.48 x 10(-7)-9.42 x 10(-7) cm(3)g(-1), respectively. Values of He -3/He-4 have a range of (1.19-4.63) x 10(-7.) Helium in the eclogite i s derived from both mantle and crust. Isotopic geochemical data of hel ium indicate that eclogite in the Dabie Mountains might be formed in d epleted mantle and the age of the cologite would be Indo-China epoch.