Petrochemistry of igneous rocks in area of the erdenetiin ovoo porphyry Cu-Mo mineralized district, Northern Mongolia

B. Munkhtsengel, O. Gerel, N. Tsuchiya, M. Ohara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Petrochemical data for the igneous rocks in and around the Erdenetiin Ovoo Porphyry Cu-Mo deposit, Orkhon Selenge trough (part of the Mongol Okhotsk Fold Belt) are re-examined. Magmatic activity of the trough started by Permian bimodal volcanism formed in extensional regime changed in early Mesozoic by compressional regime by intrusion of calc-alkaline gabbro-granodiorite-granite of the Selenge Intrusive Complex with subsequent intrusion of Porphyry Association followed by trachybasalt-trachyandesite alkaline series volcanics of the Mogod Formation. Permian volcanics exhibits typical continental arc characteristics, the Selenge Complex intrusion and Porphyry Association are related to calc-alkaline, I-type, magnetite series, medium and high K rock, and enriched in LIL, depleted in Nb, Ta, Ti and P that typical for continental arc environment. The Mogod Formation is characterized by variation in K, enrichment in Al and LIL, depletion in Nb, Ta and Ti, showing magmas derived from a sub-arc mantle source. Petrochemistry and low initial 87Sr/86Sr isotope ratio of intrusive rocks are corresponding to the adakitic nature and consisting with arc condition.

Original languageEnglish
Title of host publicationWATER DYANMICS
Subtitle of host publication4th International Workshop on Water Dynamics
Pages63-65
Number of pages3
DOIs
Publication statusPublished - 2007 May 11
Event4th International Workshop on Water Dynamics - Sendai, Japan
Duration: 2006 Nov 72006 Nov 8

Publication series

NameAIP Conference Proceedings
Volume898
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other4th International Workshop on Water Dynamics
CountryJapan
CitySendai
Period06/11/706/11/8

Keywords

  • Erdenet porphyry association
  • Magmatism
  • Selenge intrusive complex

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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