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Evidence for a "Cadomian" ophiolite and magmatic-arc complex in SW Bulgaria

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Date

2012

Authors

Kounov, Alexandre
Graf, Johannes
von Quadt, A.
Bernoulli, Daniel
Burg, Jean-Pierre
Seward, Diane
Ivanov, Zivko
Fanning, Christopher

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

New geochronological and geochemical data from the magmatic rocks of the Kraishte area (SW Bulgaria) reveal the existence of Cadomian arc magmatism intruding an ophiolitic complex. Similar geochemical signatures and crystallization ages of the basic to acidic rocks of the Struma Unit and the Osogovo-Lisets Complex suggest that these rocks were derived from one calc-alkaline magma source. They were parts of a magmatic arc associated during Ediacaran-Early Cambrian (560-540. Ma) times with subduction of the Proterozoic Prototethys Ocean. The geochemical analysis of the coeval calc-alkaline granitic magmatism (577-551. Ma) in the Morava Nappe reveals a trend from a within-plate towards volcanic-arc affinity.

Description

Keywords

Keywords: Cadomian orogeny; calc alkaline rock; Cambrian; crystallization; Ediacaran; geochronology; magma chemistry; magmatism; nappe; ophiolite; plate motion; uranium-lead dating; zircon; Bulgaria; Kraishte Bulgaria; Cadomian orogen; Kraishte; Magmatic arc; Ophiolites; U/Pb zircon analysis

Citation

URI

http://hdl.handle.net/1885/52583

Collections

ANU Research Publications

Source

Precambrian Research

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1016/j.precamres.2012.06.003

Restricted until

2037-12-31

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01_Kounov_Evidence_for_a_"Cadomian"_2012.pdf (2.86 MB)

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