Skip to Main Content
GEOREF RECORD

Opening of the neo-Tethys Ocean and the Pangea B to Pangea A transformation during the Permian

Giovanni Muttoni, Maurizio Gaetani, Dennis V. Kent, Dario Sciunnach, Lucia Angiolini, Fabrizio Berra, Eduardo Garzanti, Massimo Mattei and Andrea Zanchi
Opening of the neo-Tethys Ocean and the Pangea B to Pangea A transformation during the Permian
GeoArabia (Manama) (2009) 14 (4): 17-48

Abstract

We studied the stratigraphy, composition, and paleomagnetic properties of lateritic weathering profiles of Permian age from northern Iran and western Karakoram, Pakistan. A limited set of samples deemed representative yielded stable low-inclination paleomagnetic components carried essentially by hematite of chemical origin isolated in massive, fine-grained, and homogeneous ferricrete facies. These laterites originated at equatorial paleolatitudes characterized by intense weathering processes under warm and humid climatic conditions. Paleomagnetic estimates of paleolatitude from Iran, Karakoram, and north Tibet from this study and the literature, albeit sparse, provide testable constraints on the motion of the Cimmerian terranes as the result of the opening of the Neo-Tethys Ocean along the eastern margin of Gondwana during the Permian. We confirm and help refine previous suggestions that the Cimmerian terranes migrated from southern Gondwanan paleolatitudes in the Early Permian to subequatorial paleolatitudes by the Middle Permian-Early Triassic. As a novel conclusion, we find that timing, rates, and geometry of Cimmerian tectonics are broadly compatible with the transformation of Pangea from an Irvingian B to a Wegenerian A-type configuration with Neo-Tethyan opening taking place contemporaneously essentially in the Permian.


ISSN: 1025-6059
Serial Title: GeoArabia (Manama)
Serial Volume: 14
Serial Issue: 4
Title: Opening of the neo-Tethys Ocean and the Pangea B to Pangea A transformation during the Permian
Affiliation: Universita di Milano, Dipartimento di Scienze della Terra, Milan, Italy
Pages: 17-48
Published: 2009
Text Language: English
Publisher: Gulf Petrolink in Bahrain, Manama, Bahrain
References: 97
Accession Number: 2010-019009
Categories: StratigraphySolid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch map
N32°30'00" - N37°00'00", E62°00'00" - E71°00'00"
Secondary Affiliation: Rutgers University, USA, United StatesUniversita di Roma Tre, ITA, Italy
Country of Publication: Bahrain
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 201012
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal