CO-EVOLUTION OF PROTEROZOIC CRATONIC FRAGMENTS IN WESTERN AND NORTHERN MONGOLIA

Yukio Isozaki,Francis Macdonald,Uyanga Bold

doi:10.5800/gt-2017-8-3-0251

Yukio Isozaki, Francis Macdonald + Show 1 more

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https://doi.org/10.5800/gt-2017-8-3-0251

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Abstract

Highlights

CAOB occupies a vast area that extends from the Urals to the Far East Asia and from the Siberian craton to the North China and Tarim cratons (Fig. 1, A)
The Zavkhan terrane (Fig. 1, B) is located in the southwestern part of Mongolia and it is well known for its rich exposures and preservation of Precambrian rocks
Detrital zircon studies have been minimally incorporated into origination questions of the Proterozoic cratonic fragments of Mongolia except what is discussed in Salnikova et al [2001] from metasediments of the Tuva-Mongolia zone, Bold et al [2016a] from the Zavkhan terrane, and Rojas-Agramonte et al [2011]

Summary

Introduction

CAOB occupies a vast area that extends from the Urals to the Far East Asia and from the Siberian craton to the North China and Tarim cratons (Fig. 1, A). In order to better constrain Precambrian tectonic evolution of the CAOB, it is important to revisit Precambrian terranes of Mongolia as outlined in Badarch et al [2002] that contain Archean to Proterozoic metamorphic basement and Neoproterozoic metasedimentary and volcanic rocks. The Zavkhan terrane (Fig. 1, B) is located in the southwestern part of Mongolia and it is well known for its rich exposures and preservation of Precambrian rocks (for example [Bold et al, 2013; Bold et al, 2016b; Macdonald et al, 2009; Smith et al, 2015]). The TuvaMongolia zone ([Dergunov, 2001]; referred to as the Khubsugul Terrane in Macdonald and Jones [2011]) is located directly north of the Zavkhan terrane and comprised of Agardag, Sangelin, Hug, Darhad, and Gargan terranes [Badarch et al, 2002]. Boundary is defined by ~375 km long, left-lateral strike slip fault, Bulnay Fault [Rizza et al, 2015]

Methods

Conclusion