globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2020.228702
论文题名:
Structural inversion of back-arc basins–The Neogene Adjara-Trialeti fold-and-thrust belt (SW Georgia) as a far-field effect of the Arabia-Eurasia collision
作者: Gusmeo T.; Cavazza W.; Alania V.M.; Enukidze O.V.; Zattin M.; Corrado S.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 803
语种: 英语
中文关键词: (U-Th)/He analysis ; Arabia-Eurasia collision ; Far-field tectonics ; Fission-track analysis ; Lesser Caucasus ; Rift inversion
英文关键词: Phosphate minerals ; Sedimentary rocks ; Stratigraphy ; Temperature ; Eastern Pontides ; Far-field effect ; Fold-and-thrust belts ; Low temperatures ; Middle Miocene ; Radiometric data ; Tectonic evolution ; Time temperature ; Fission reactions ; backarc basin ; continental collision ; fission track dating ; fold and thrust belt ; Neogene ; rifting ; structural geology ; tectonics ; uranium series dating ; Arabian Peninsula ; Caucasus ; Eurasia ; Georgia (republic) ; Meleagris gallopavo
英文摘要: The 350 km-long Adjara-Trialeti fold-and-thrust belt of southwestern Georgia is the result of the structural inversion of a continental back-arc basin developed in the Paleogene on the upper (Eurasian) plate of the northward subducting northern branch of the Neotethys. Low-temperature thermochronological data [fission-track and (U-Th)/He analyses on apatite] from sedimentary and plutonic rocks provide robust constraints on the tectonic evolution of the Adjara-Trialeti orogenic belt. Fission-track central ages range from the Middle Eocene to the Middle Miocene (46–15 Ma); helium ages are clustered in the Late Miocene-Pliocene (10–3 Ma). Time-temperature paths obtained integrating thermochronologic, stratigraphic, and radiometric data show that the volcanosedimentary basin fill of the Adjara-Trialeti back-arc basin underwent progressive burial heating prior to final cooling/exhumation in the late Middle Miocene-Pliocene. These new data show that the Adjara-Trialeti back-arc basin was inverted and developed as a fold-and-thrust belt starting at 14–10 Ma, in tune with widespread Middle-to-Late Miocene shortening and exhumation across wide areas of the Middle East, from the eastern Pontides of NE Turkey to the Lesser Caucasus in northern Armenia and NW Azerbaijan, and the Talysh and Alborz ranges in northern Iran. Such a supraregional tectonism is interpreted as a far-field effect of the Arabia-Eurasia collision along the Bitlis suture ca. 400 km to the south of the study area. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170814
Appears in Collections:气候变化与战略

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作者单位: Department of Biological, Geological and Environmental Sciences, Univ. of Bologna, Italy; Institute of Geophysics, I. Javakhishvili State University, Tbilisi, Georgia; Department of Geosciences, Univ. of Padova, Italy; Department of Sciences, Roma Tre University, Rome, Italy

Recommended Citation:
Gusmeo T.,Cavazza W.,Alania V.M.,et al. Structural inversion of back-arc basins–The Neogene Adjara-Trialeti fold-and-thrust belt (SW Georgia) as a far-field effect of the Arabia-Eurasia collision[J]. Tectonophysics,2021-01-01,803
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