TAVŞANLI ZONE: THE NORTHERN SUBDUCTED MARGIN OF THE ANATOLIDETAURIDE BLOCK

Aral İ. OKAY

Article Details

TAVŞANLI ZONE: THE NORTHERN SUBDUCTED MARGIN OF THE ANATOLIDETAURIDE BLOCK

Authors:

Aral İ. OKAY

Publisher:

Maden Tetkik Arama Genel Müdürlüğü

Main Topics:

Applied physics

Journal:

Bulletin of the Mineral Research and Exploration 2011 Vol.142 Issue 142, pp.191-221

Document Type:

Article

Publication Date:

10/2011

Document Language:

English

Document ID (Org No.):

2000520627

Frequency:

Tri-annual

pISSN:

0026-4563

Abstract:

 


The Tavşanlı Zone constitutes the northern margin of the Anatolide-Tauride Block that has
undergone high pressure-low temperature metamorphism during the Cretaceous. It is bounded in the north by the İzmir-Ankara suture and in the south by the rocks of the Afyon Zone. The Tavşanlı Zone is subdivided into four
tectonic units. At the base there is the Orhaneli Group, which shows a regular stratigraphic succession that has
underdone metamorphism at ~24 kbar pressure and 430-500 °C temperature during the Late Cretaceous (~80
Ma). From the base upward the Orhaneli Group consists of micaschist, marble and metabasite-metachertphyllite,
and is tectonically overlain by ophiolitic mélange or directly by ophiolite. The ophiolitic mélange consists
of basalt, chert, pelagic shale and limestone, and has undergone an incipient blueschist facies metamorphism.
The ophiolite constitutes the topmost member of the tectonic stack. It consists mainly of peridotite (>%90) with
minor gabbro and pyroxenite, and is cut by isolated diabase dykes. In the western part of the Tavşanlı Zone all
these tectonic units are intruded by Lower to Middle Eocene granodiorites, and in the eastern part of the Tavşanlı Zone the blueschists and ophiolite are overlain by Lower Eocene marine limestones. The northern margin of the
Anatolide-Tauride Block was buried in an intra-oceanic subduction zone during the Campanian and Paleocene
underwent HP/LT metamorphism. The blueschists were exhumed during ongoing subduction and prior to continental
collision through a thrust fault at the base and a normal fault at the top. In terms of tectonic setting and the
timing of the geological events, the Tavşanlı Zone exhibits close similarities to the Semail ophiolite and the underlying
blueschists.

.

Article Details

TAVŞANLI ZONE: THE NORTHERN SUBDUCTED MARGIN OF THE ANATOLIDETAURIDE BLOCK

Authors: Aral İ. OKAY

Publisher: Maden Tetkik Arama Genel Müdürlüğü

Main Topics: Applied physics

Journal: Bulletin of the Mineral Research and Exploration 2011 Vol.142 Issue 142, pp.191-221

Document Type: Article

Publication Date: 10/2011

Document Language: English

Document ID (Org No.): 2000520627

Frequency: Tri-annual

pISSN: 0026-4563

Issues

Authors:

Aral İ. OKAY

Publisher:

Maden Tetkik Arama Genel Müdürlüğü

Main Topics:

Applied physics

Journal:

Bulletin of the Mineral Research and Exploration 2011 Vol.142 Issue 142, pp.191-221

Document Type:

Article

Publication Date:

10/2011

Document Language:

English

Document ID (Org No.):

2000520627

Frequency:

Tri-annual

pISSN:

0026-4563