scholarly journals Thermal evolution of the Malá Fatra Mountains (Central Western Carpathians): insights from zircon and apatite fission track thermochronology

2010 ◽  
Vol 61 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Martin Danišík ◽  
Milan Kohút ◽  
Igor Broska ◽  
Wolfgang Frisch
Keyword(s):  
Fission Track ◽  
Thermal Evolution ◽  
Western Carpathians ◽  
Low Grade ◽  
Apatite Fission Track ◽  
Metamorphic Overprint ◽  
Fission Track Thermochronology ◽  
Fast Cooling ◽  
Central Western Carpathians ◽  
Early Late

Thermal evolution of the Malá Fatra Mountains (Central Western Carpathians): insights from zircon and apatite fission track thermochronologyWe apply zircon and apatite fission track thermochronology (ZFT and AFT, respectively) to the Variscan crystal-line basement of the Malá Fatra Mts (Central Western Carpathians) in order to constrain the thermal history. The samples yielded three Early Cretaceous ZFT ages (143.7±9.6, 143.7±8.3, 135.3±6.9 Ma) and one Eocene age (45.2±2.1 Ma), proving that the basement was affected by a very low-grade Alpine metamorphic overprint. Although the precise timing and mechanisms of the overprint cannot be unequivocally resolved, we propose and discuss three alternative explanations: (i) a Jurassic/Cretaceous thermal event related to elevated heat flow associated with extensional tectonics, (ii) early Late Cretaceous thrusting and/or (iii) an Eocene orogeny. Thermal modelling of the AFT cooling ages (13.8±1.4 to 9.6±0.6 Ma) revealed fast cooling through the apatite partial annealing zone. The cooling is interpreted in terms of exhumation of the basement and creation of topographic relief, as corroborated by the sedimentary record in the surrounding Neogene depressions. Our AFT results significantly refine a general exhumation pattern of basement complexes in the Central Western Carpathians. A younging of AFT ages towards the orogenic front is evident, where all the external massifs located closest to the orogenic front (including Malá Fatra Mts) were exhumed after ~13 Ma from temperatures above ~120 °C.

Fission-track thermochronology of the Oman Mountains continental windows, and current problems of tectonic interpretation

2006 ◽  
Vol 177 (3) ◽  
pp. 127-134 ◽  
Author(s):  
Omar Saddiqi ◽  
André Michard ◽  
Bruno Goffe ◽  
Gérard Poupeau ◽  
Roland Oberhänsli
Keyword(s):  
Late Cretaceous ◽  
Fission Track ◽  
Thermal Evolution ◽  
Low Grade ◽  
Isostatic Rebound ◽  
Oman Mountains ◽  
Relative Extension ◽  
Fission Track Thermochronology ◽  
Eclogite Facies

Abstract The Oman Mountain belt offers a unique case study of an Alpine orogen where blueschist- and eclogite-facies metamorphism developed in continental rocks beneath an ophiolite in the absence of continental collision. We present hereafter the first systematic, fission-track (FT) study of the subophiolitic Jebel Akhdar and Saih Hatat windows in the central-southern Oman Mountains. Nineteen samples out of 28 yielded significant zircon and/or apatite FT results. All of the 9 samples from NE (internal) Saih Hatat, where metamorphism occurred at ca. 300°C < T < 550°C (low-grade blueschist to low-grade eclogite facies), yielded FT zircon ages at 66-70 Ma. Four samples from SW Saih Hatat (front of the Fe-Mg carpholite zone, ca. 280°C < T < 300°C) yielded 69-93 Ma dates, and 4 samples from Jebel Akhdar (ca. 250°C < T < 280°C) yielded 80-96 Ma dates, which reflects partial resetting of the zircon FT chronometre at T ≤ ca. 280°C. As eclogite metamorphism of the deepest Saih Hatat units is dated at ca. 80 Ma [Warren et al., 2003], we deduce an early cooling rate of 30°C/Ma for these units. Late thermal evolution is constrained by apatite FT length optimization analysis and includes, i) cooling under 60°C until 60-58 Ma (rate close to 10°C/Ma); and ii) heating over 80°C at ca. 20-8 Ma. The Oman Mountains tectonic building is currently accounted for by contrasting models involving one or two subductions. Taking into account the structural and geophysical data on the Saih Hatat metamorphic pile, we interpret the reported thermal evolution in the framework of the classical, one subduction model: i) Permian rifting and Mesozoic spreading; ii) late Cretaceous intra-oceanic subduction followed by continental margin subduction/ophiolite obduction; iii) late Late Cretaceous-Paleocene synorogenic exhumation of the subducted units through extrusion within the subduction channel (relative extension), then isostatic rebound and extensional inversion of the obduction thrust; and iv) Neogene compression resulting in rejuvenation of the basal thrust beneath the continental windows, which are considered to be parautochthonous.

Late thermal evolution of the Oman Mountains subophiolitic windows: Apatite fission-track thermochronology

Geology ◽  
1998 ◽  
Vol 26 (12) ◽  
pp. 1139 ◽  
Author(s):  
Gérard Poupeau ◽  
Omar Saddiqi ◽  
André Michard ◽  
Bruno Goffé ◽  
Roland Oberhänsli
Keyword(s):  
Fission Track ◽  
Thermal Evolution ◽  
Apatite Fission Track ◽  
Oman Mountains ◽  
Fission Track Thermochronology

New apatite fission track thermochronology data from the Siberian Permian-Triassic Traps

2020 ◽  
Author(s):  
Tanya Bagdasaryan ◽  
Roman Veselovskiy ◽  
Maria Myshenkova ◽  
Viktor Zaitsev ◽  
Stuart Thomson ◽  
...  
Keyword(s):  
Siberian Platform ◽  
Thermal History ◽  
Fission Track ◽  
Thermal Evolution ◽  
Total Duration ◽  
Large Igneous Province ◽  
Apatite Fission Track ◽  
Siberian Traps ◽  
Fission Track Thermochronology ◽  
First Results

<p>The thermal history of the Siberian platform has not been studied and only single thermochronological study is available now [Rosen et al., 2009]. According to high-precision U-Pb dating the main phase of magmatic activity of the Siberian Traps Large Igneous Province took place ~252.0-251.3 Ma [Kamo et al., 2003] and its duration didn’t exceed ~1 Myr. But according to Ar/Ar dating (~240 Ma) [Ivanov et al., 2013] the total duration of the Siberian Traps formation may be estimated as long as ~10 Myr. In addition, single apatite fission track (AFT) ages are approximately 222-185 Ma [Rosen et al., 2009].</p><p>We present the first results of AFT dating from the Guli pluton and computer modeling of its post-magmatic cooling, as well as some new AFT ages from other magmatic bodies within the Siberian platform. Based on these data we present the first model of the tectonothermal evolution of the Siberian platform in Mesozoic and Cenozoic.</p><p>The Guli massif is located within the Maymecha-Kotuy region of the Siberian Permian-Triassic Traps and is the world's largest alkaline-ultrabasic complex. Results of U-Pb dating of baddeleyite from the carbonatites – the latest intrusion phase – 250.2±0.3 Ma [Kamo et al., 2003] correspond to the time of massif’s crystallization.</p><p>AFT dating was conducted by an external detector method at the University of Arizona (Tucson). The fission track ages of the Guli are in the range of ~250-231 Ma with the mean standard error (1σ) ±34 Myr. In addition, we obtain five new AFT ages as well as U-Pb age obtained from different intrusive bodies within the Siberian platform: Kontayskaya intrusion, Odikhincha massif and Padunsky sill. All obtained AFT ages are in the range of 195-173 ±13 (1σ) Ma, which corresponds to the Early-Middle Jurassic. At the same time, the U-Pb LA-ICPMS age of apatite from Padunsky sill is 242±7 Ma.</p><p>Thermal history modeling using fission track age data and track lengths distribution was performed in HeFTy v.1.8.3. Based on the obtained results we consider the following model of tectonic-thermal evolution of the studied intrusive massifs: (1) the emplacement of intrusions ca. 250 Ma; (2) their burial under a thick sedimentary (volcanic?) cover; (3) regional exhumation and cooling below 110°C about 220-190 Ma.</p><p>The research was carried out with the support of RFBR (grants 18-35-20058 and 18-05-00590) and Programs of development of Lomonosov Moscow State University.</p>

scholarly journals Tectonic Evolution of the SE West Siberian Basin (Russia): Evidence from Apatite Fission Track Thermochronology of Its Exposed Crystalline Basement

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 604
Author(s):  
Evgeny V. Vetrov ◽  
Johan De Grave ◽  
Natalia I. Vetrova ◽  
Fedor I. Zhimulev ◽  
Simon Nachtergaele ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Fission Track ◽  
Analytical Data ◽  
Tectonic Activity ◽  
Apatite Fission Track ◽  
Tectonic Processes ◽  
Basement Rocks ◽  
Fission Track Thermochronology ◽  
History Of ◽  
West Siberian Basin

The West Siberian Basin (WSB) is one of the largest intracratonic Meso-Cenozoic basins in the world. Its evolution has been studied over the recent decades; however, some fundamental questions regarding the tectonic evolution of the WSB remain unresolved or unconfirmed by analytical data. A complete understanding of the evolution of the WSB during the Mesozoic and Cenozoic eras requires insights into the cooling history of the basement rocks as determined by low-temperature thermochronometry. We presented an apatite fission track (AFT) thermochronology study on the exposed parts of the WSB basement in order to distinguish tectonic activation episodes in an absolute timeframe. AFT dating of thirteen basement samples mainly yielded Cretaceous cooling ages and mean track lengths varied between 12.8 and 14.5 μm. Thermal history modeling based on the AFT data demonstrates several Mesozoic and Cenozoic intracontinental tectonic reactivation episodes affected the WSB basement. We interpreted the episodes of tectonic activity accompanied by the WSB basement exhumation as a far-field effect from tectonic processes acting on the southern and eastern boundaries of Eurasia during the Mesozoic–Cenozoic eras.

Corrigendum to “Apatite fission-track thermochronology applied to the Chulyshman Plateau, Siberian Altai Region”

2008 ◽  
Vol 43 (2-6) ◽  
pp. 1175
Author(s):  
J. De Grave ◽  
P. Van den haute ◽  
M.M. Buslov ◽  
B. Dehandschutter ◽  
S. Glorie
Keyword(s):  
Fission Track ◽  
Apatite Fission Track ◽  
Altai Region ◽  
Fission Track Thermochronology
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