globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-017-1447-z
Scopus记录号: 2-s2.0-85019146314
论文题名:
New paleomagnetic results from Upper Cretaceous arc-type rocks from the northern and southern branches of the Neotethys ocean in Anatolia
作者: Cengiz Cinku M.; Heller F.; Ustaömer T.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期:7
起始页码: 2575
结束页码: 2592
语种: 英语
英文关键词: Neotethys Suture Zone ; Paleomagnetic ; Pontides ; Taurides ; Upper Cretaceous
英文摘要:

A paleomagnetic study of Cretaceous arc type rocks in the Central-Eastern Pontides and in the Southeastern Taurides investigates the tectonic and paleolatitudinal evolution of three volcanic belts in Anatolia, namely the Northern and Southern Volcanic Belts in the Pontides and the SE Taurides volcanic belt. The paleomagnetic data indicate that magnetizations were acquired prior to folding at most sampling localities/sites, except for those in the Erzincan area in the Eastern Pontides. The Southern Volcanic Belt was magnetized at a paleolatitude between 23.8-3.8+4.2°N and 20.2-1.2+1.3°N. Hisarlı (J Geodyn 52:114–128, 2011) reported a more northerly paleolatitude (26.6-4.6+5.1°N) for the Northern Volcanic Belt. The comparison of the new paleomagnetic results with previous ones in Anatolia allows to conclude that the Southern Volcanic Belt in the Central-Eastern Pontides was emplaced after the Northern Volcanic Belt as a result of slab-roll back of the Northern Neotethys ocean in the Late Cretaceous. In the Southeast Taurides, Upper Cretaceous arc-related sandstones were at a paleolatitude of 16.8-3.8+4.2. The Late Cretaceous paleomagnetic rotations in the Central Pontides exhibit a counterclockwise rotation of R± Δ R= - 37.1 ∘± 5.8 ∘ (Group 1; Çankırı, Yaylaçayı Formation) while Maastrichtian arc type rocks in the Yozgat area (Group 2) show clockwise rotations R + ΔR = 33.7° ± 8.4° and R + ΔR = 29.3° ± 6.0°. In the SE Taurides counterclockwise and clockwise rotations of R±ΔR=-48.6∘±5.2∘ and R±ΔR=+34.1∘±15.1∘ are obtained (Group 4; Elazığ Magmatic Complex). The Late Cretaceous paleomagnetic rotations in the Pontides follow a general trend in concordance with the shape of the suture zone after the collision between the Pontides and the Kırşehir block. The affect of the westwards excursion of the Anatolian plate and the associated fault bounded block rotations in Miocene are observed in the east of the study area and the SE Taurides. © 2017, Springer-Verlag Berlin Heidelberg.

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019146314&doi=10.1007%2fs00531-017-1447-z&partnerID=40&md5=7e6827d467afdd5324ba841d05a35ecc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69975
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Faculty of Engineering, Department of Geophysical Engineering, Istanbul University, Avcılar/istanbul, Turkey; Department of Earth Sciences, Institute of Geophysics, Sonneggstrasse 5, ETH Zurich, Zurich, Switzerland

Recommended Citation:
Cengiz Cinku M.,Heller F.,Ustaömer T.. New paleomagnetic results from Upper Cretaceous arc-type rocks from the northern and southern branches of the Neotethys ocean in Anatolia[J]. International Journal of Earth Sciences,2017-01-01,106(7)
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