GEOCHEMICAL CHARACTERISTICS AND GENESIS OF DACHADABAN OPHIOLITE IN NORTH QILIAN AREA

Authors
ZHANG Q CHEN Y ZHOU DJ QIAN Q JIA XQ HAN S
Citation
Q. Zhang et al., GEOCHEMICAL CHARACTERISTICS AND GENESIS OF DACHADABAN OPHIOLITE IN NORTH QILIAN AREA, SCIENCE IN CHINA SERIES D-EARTH SCIENCES, 41(3), 1998, pp. 277-281
Citations number
9
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
SCIENCE IN CHINA SERIES D-EARTH SCIENCES → ACNP
ISSN journal
10069313
Volume
41
Issue
3
Year of publication
1998
Pages
277 - 281
Database
ISI
SICI code
1006-9313(1998)41:3<277:GCAGOD>2.0.ZU;2-Q
Abstract
There are three groups of pillow volcanics in the Dachadaban ophiolite . Group 1 is typical boninite, enriched in Si, Mg and depleted.in Ti, HREE and.HFSE; group 2 is the evolved boninite, slightly higher abunda nce of Ti, HREE, HFSE and.large variation of Mg' due to fractional cry stallization; and group 3 is tholeiite with MORE : character. The exis tence of MORB and boninite indicates;hat the Dachadaban ophiolite was probably formed in island-arc and back-arc environments.