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- Title
Geodynamic formation conditions of Early Cambrian lavas in the Ozernaya zone of Mongolia.
- Authors
Kovalenko, D.; Mongush, A.; Sath, H.
- Abstract
Four types of pre-accretionary Early Cambrian lava sequences are distinguishable in the geological structure of the Ozernaya zone in western Mongolia: (I) close to N-MORB; (II) close to E-MORB; (III) enriched with trace elements and with HFSE minimums; (IV) depleted in trace elements and with HFSE minimums. All these lavas could have been formed in an island-arc-back-arc basin system. N-MORB basalts were melted from depleted magma sources with с ε( t) = 10.0-11.5. Plume melts originated from mantle sources with ε( t) = 4.8-9.7. The sources of island arc lavas were characterized by ε( t) = 7.3-9.9.
- Subjects
MONGOLIA; LAVA; CAMBRIAN stratigraphic geology; GEODYNAMICS; VOLCANIC plumes; MANTLE plumes
- Publication
Doklady Earth Sciences, 2016, Vol 469, Issue 2, p791
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X16080122