☆ 4.0 Article

U-Pb and Sm-Nd geochronology of the ophiolites from the SE Turkey: implications for the Neotethyan evolution

GEODINAMICA ACTA (2012)

Journal

GEODINAMICA ACTA

Volume 25, Issue 3-4, Pages 146-161

Publisher

TAYLOR & FRANCIS LTD

DOI: 10.1080/09853111.2013.858948

Keywords

U-Pb; Sm-Nd; Southeast Anatolia; Ophiolite; Southern Neotethys

Funding

TUBITAK [106Y231]
Cukurova University Research Foundation [MMF2009D11]
TUBITAK-BIDEB

Ask authors/readers for more resources

Protocol

Community support

Reagent

Community support

Abstract

The ophiolites in southeast Turkey crop out along two distinct belts. The ophiolites in the north are attached to Tauride active margin and represented by Goksun, Berit, Ispendere, Komurhan and Guleman ophiolites. Whereas the ophiolites in the south are observed as tectonically overlying the Arabian continental margin and characterized mainly by Kizildag (Hatay) and Kocali ophiolites. In this paper, new U-Pb and Sm-Nd isotopic ages are presented. The zircons extracted from the gabbroic cumulates of the Komurhan ophiolite yielded a concordia age of 87.2 +/- 3.1 Ma. The zircons in the gabbroic cumulates of the Ispendere ophiolite yielded a Concordia age of 84.5 +/- 3.9 Ma. Moreover, the Sm-Nd age of the gabbroic cumulates of the Ispendere ophiolite yielded 85.1 +/- 7.1 Ma (epsilon Nd = + 7.8). The gabbroic rocks of the Kizildag (Hatay) ophiolite yielded 110 +/- 11 Ma (epsilon Nd = + 7.3) Sm-Nd isochron age. The new and already published U-Pb and Sm-Nd ages from the Kizildag ophiolite suggest that the time span between the melt generation in a subduction zone setting and SSZ-type oceanic crust crystallization was >= 3 my. All the ages from the Southeast Anatolian ophiolites suggest that the ophiolites between the Bitlis-Puturge continent and the Arabian platform formed around 99-102 Ma whereas the ophiolites between the Bitlis-Puturge continent and the Tauride platform formed around 84-90 Ma, suggesting that the peri-Arabic belt ophiolites are 10 My older than the ophiolite attached to the Malatya-Keban platform in the north. Detailed comparison suggests that there are number of differences between the ophiolites to the north and south of the Bitlis-Puturge continental unit based on the geological, geochronological, petrological, internal stratigraphy of the ophiolites as well as their relationships with the continental fragments during the late Cretaceous. Therefore, the ophiolites were rooted from two different oceanic basins, one to the north and other to the south of the Bitlis-Puturge continent.

Authors

I am an author on this paper

Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.0

Not enough ratings

Secondary Ratings

Novelty

Significance

Scientific rigor

Rate this paper

Long-lived low Th/U Pacific-type isotopic mantle domain: Constraints from Nd and Pb isotopes of the Paleo-Asian Ocean mantle

Xijun Liu, Ji-Feng Xu, Paterno R. Castillo, Wenjiao Xiao, Yu Shi, Zhiguo Zhang, Xuan-Ce Wang, Songjian Ao, Baohua Wang, Rongguo Hu, Xuefa Shi, Hongxia Yu, Pengde Liu, Yujia Song

Summary: The study reveals the differences between Pacific-type and Indian-type mantle domains in the upper mantle, both of which can be traced back to either the early Paleozoic or Neoproterozoic, with the Indian-type mantle domain influenced by plate tectonics, while the Pacific-type mantle domain may originate from Earth's primordial mantle.

EARTH AND PLANETARY SCIENCE LETTERS (2021)