scholarly journals Supplemental Material: Cenozoic tectonic evolution of the Ecemiş fault zone and adjacent basins, central Anatolia, Turkey during the transition from Arabia-Eurasia collision to escape tectonics

2020 ◽  
Author(s):  
P.J. Umhoefer ◽  
et al.
Keyword(s):  
Fault Zone ◽  
Tectonic Evolution ◽  
Fission Track ◽  
Volcanic Rocks ◽  
Detrital Zircons ◽  
Central Anatolia ◽  
Zircon Fission Track ◽  
Escape Tectonics

Consists of geochronology and thermochronology data, and methods related to those data. Geochronology data are from <sup>40</sup>Ar/<sup>39</sup>Ar dating of volcanic rocks and U-Pb analysis of detrital zircons, while thermochronology data are from apatite and zircon fission-track and apatite helium cooling ages.

scholarly journals Supplemental Material: Cenozoic tectonic evolution of the Ecemiş fault zone and adjacent basins, central Anatolia, Turkey during the transition from Arabia-Eurasia collision to escape tectonics

2020 ◽  
Author(s):  
P.J. Umhoefer ◽  
et al.
Keyword(s):  
Fault Zone ◽  
Tectonic Evolution ◽  
Fission Track ◽  
Volcanic Rocks ◽  
Detrital Zircons ◽  
Central Anatolia ◽  
Zircon Fission Track ◽  
Escape Tectonics

Consists of geochronology and thermochronology data, and methods related to those data. Geochronology data are from <sup>40</sup>Ar/<sup>39</sup>Ar dating of volcanic rocks and U-Pb analysis of detrital zircons, while thermochronology data are from apatite and zircon fission-track and apatite helium cooling ages.

scholarly journals Cenozoic tectonic evolution of the Ecemiş fault zone and adjacent basins, central Anatolia, Turkey, during the transition from Arabia-Eurasia collision to escape tectonics

Geosphere ◽  
2020 ◽  
Vol 16 (6) ◽  
pp. 1358-1384
Author(s):  
Paul J. Umhoefer ◽  
Stuart N. Thomson ◽  
Côme Lefebvre ◽  
Michael A. Cosca ◽  
Christian Teyssier ◽  
...  
Keyword(s):  
Fault Zone ◽  
Tectonic Evolution ◽  
Tectonic Setting ◽  
Structural Data ◽  
Late Eocene ◽  
Central Anatolia ◽  
Normal Faults ◽  
Profound Change ◽  
Escape Tectonics ◽  
Lateral Offset

Abstract The effects of Arabia-Eurasia collision are recorded in faults, basins, and exhumed metamorphic massifs across eastern and central Anatolia. These faults and basins also preserve evidence of major changes in deformation and associated sedimentary processes along major suture zones including the Inner Tauride suture where it lies along the southern (Ecemiş) segment of the Central Anatolian fault zone. Stratigraphic and structural data from the Ecemiş fault zone, adjacent NE Ulukışla basin, and metamorphic dome (Niğde Massif) record two fundamentally different stages in the Cenozoic tectonic evolution of this part of central Anatolia. The Paleogene sedimentary and volcanic strata of the NE Ulukışla basin (Ecemiş corridor) were deposited in marginal marine to marine environments on the exhuming Niğde Massif and east of it. A late Eocene–Oligocene transpressional stage of deformation involved oblique northward thrusting of older Paleogene strata onto the eastern Niğde Massif and of the eastern massif onto the rest of the massif, reburying the entire massif to &gt;10 km depth and accompanied by left-lateral motion on the Ecemiş fault zone. A profound change in the tectonic setting at the end of the Oligocene produced widespread transtensional deformation across the area west of the Ecemiş fault zone in the Miocene. In this stage, the Ecemiş fault zone had at least 25 km of left-lateral offset. Before and during this faulting episode, the central Tauride Mountains to the east became a source of sediments that were deposited in small Miocene transtensional basins formed on the Eocene–Oligocene thrust belt between the Ecemiş fault zone and the Niğde Massif. Normal faults compatible with SW-directed extension cut across the Niğde Massif and are associated with a second (Miocene) re-exhumation of the Massif. Geochronology and thermochronology indicate that the transtensional stage started at ca. 23–22 Ma, coeval with large and diverse geological and tectonic changes across Anatolia.

Fission-track dating of the tectonic development of the San Juan Islands, Washington

1986 ◽  
Vol 23 (9) ◽  
pp. 1318-1330 ◽  
Author(s):  
Samuel Y. Johnson ◽  
Robert A. Zimmermann ◽  
Charles W. Naeser ◽  
John T. Whetten
Keyword(s):  
Late Cretaceous ◽  
Lower Cretaceous ◽  
Fission Track ◽  
Frictional Heating ◽  
Geothermal Gradient ◽  
Upper Triassic ◽  
Detrital Zircons ◽  
San Juan ◽  
San Juan Islands ◽  
Zircon Fission Track

The San Juan Islands of Washington State form a geologically complex province located between the north Cascades, Vancouver Island, and the Olympic Peninsula. We have obtained 53 fission-track dates from the San Juan Islands province that help constrain its late Paleozoic to early Cenozoic tectonic and sedimentary history and its relationship to neighboring geologic terranes. The San Juan Islands can be divided into two main blocks separated by the Haro fault. South of the Haro fault, complexly deformed, metamorphosed, and probably exotic early Paleozoic to early Late Cretaceous rocks form four imbricate thrust plates separated by south- and east-dipping late Early to Late Cretaceous thrust faults. Reset zircon fission-track dates indicate that thrusting may have produced an upside-down geothermal gradient in the uppermost plate, the Decatur terrane. If present, this gradient was probably produced by conductive or frictional heating associated with a now-eroded overlying thrust fault and hot thrust plate. Cretaceous thrusting in the southern San Juan Islands was accompanied by uplift and resetting of apatite fission-track dates. In contrast to correlative rocks of the southern San Juan Islands, Upper Triassic to Lower Cretaceous rocks in and north of the Haro fault zone are essentially unmetamorphosed and only broadly folded. Apatite dates from the Upper Triassic Haro Formation and the Upper Jurassic and Lower Cretaceous Spieden Group indicate they did not participate in Late Cretaceous uplift of the southern San Juan Islands. Together with their basement (the Wrangellia terrane?), these rocks probably acted as a backstop to thrusting. The synorogenic Late Cretaceous Nanaimo basin formed north of the Haro fault in front of the advancing San Juan Islands thrust system. The age of Nanaimo deposition matches uplift (apatite) dates in the southern San Juan Islands, and detrital zircons from the Nanaimo Group yield dates consistent with southern San Juan Islands sources. Burial led to resetting of apatite dates in what is probably the deeper part of the Nanaimo basin.

scholarly journals Low-temperature thermochronological constraints on the Аlpine evolution of the central parts of Sredna Gora Zone, Bulgaria

2021 ◽  
Vol 82 (3) ◽  
pp. 81-83
Author(s):  
Eleonora Balkanska ◽  
Stoyan Georgiev ◽  
Alexandre Kounov ◽  
Milorad Antić ◽  
Takahiro Tagami ◽  
...  
Keyword(s):  
Low Temperature ◽  
Tectonic Evolution ◽  
Upper Cretaceous ◽  
Fission Track ◽  
Sedimentary Cover ◽  
Heating And Cooling ◽  
Zircon Fission Track

We present the first apatite and zircon fission-track results coupled with new muscovite and biotite 40Ar/39Ar analysis on samples from the pre-Mesozoic granitic basement and the Upper Cretaceous to Danian volcano-sedimentary cover, which allowed us to reveal the Alpine thermal and tectonic evolution of the central parts of Sredna Gora Zone. Our new results disclosed the existence of several heating and cooling episodes related to distinct tectonic and magmatic events in the studied area.

scholarly journals Cretaceous—Quaternary tectonic evolution of the Tatra Mts (Western Carpathians): constraints from structural, sedimentary, geomorphological, and fission track data

2014 ◽  
Vol 65 (4) ◽  
pp. 307-326 ◽  
Author(s):  
Silvia Králiková ◽  
Rastislav Vojtko ◽  
Ubomír Sliva ◽  
Jozef Minár ◽  
Bernhard Fügenschuh ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Elevated Temperatures ◽  
Fission Track ◽  
Crystalline Basement ◽  
Western Carpathians ◽  
Tectonic Activity ◽  
Zircon Fission Track ◽  
Tatra Mts ◽  
Fission Track Ages ◽  
Central Western Carpathians

Abstract The Tatra Mts area, located in the northernmost part of Central Western Carpathians on the border between Slovakia and Poland, underwent a complex Alpine tectonic evolution. This study integrates structural, sedimentary, and geomorphological data combined with fission track data from the Variscan granite rocks to discuss the Cretaceous to Quaternary tectonic and landscape evolution of the Tatra Mts. The presented data can be correlated with five principal tectonic stages (TS), including neotectonics. TS-1 (~95-80 Ma) is related to mid-Cretaceous nappe stacking when the Tatric Unit was overlain by Mesozoic sequences of the Fatric and Hronic Nappes. After nappe stacking the Tatric crystalline basement was exhumed (and cooled) in response to the Late Cretaceous/Paleogene orogenic collapse followed by orogen-parallel extension. This is supported by 70 to 60 Ma old zircon fission track ages. Extensional tectonics were replaced by transpression to transtension during the Late Paleocene to Eocene (TS-2; ~80-45 Ma). TS-3 (~45-20 Ma) is documented by thick Oligocene-lowermost Miocene sediments of the Central Carpathian Paleogene Basin which kept the underlying Tatric crystalline basement at elevated temperatures (ca. > 120 °C and < 200 °C). The TS-4 (~20-7 Ma) is linked to slow Miocene exhumation rate of the Tatric crystalline basement, as it is indicated by apatite fission track data of 9-12 Ma. The final shaping of the Tatra Mts has been linked to accelerated tectonic activity since the Pliocene (TS-5; ~7-0 Ma).

Late Cenozoic geomorphic and tectonic evolution of the Patagonian Andes between latitudes 42°S and 46°S: An appraisal based on fission-track results from the transpressional intra-arc Liquiñe-Ofqui fault zone

2002 ◽  
Vol 114 (9) ◽  
pp. 1159-1173 ◽  
Author(s):  
Stuart N. Thomson
Keyword(s):  
Heat Flow ◽  
Fault Zone ◽  
Tectonic Evolution ◽  
Fission Track ◽  
Strike Slip ◽  
Late Cenozoic ◽  
History Of ◽  
Patagonian Andes ◽  
Digital Landscape ◽  
Fast Rates

Abstract Fission-track (FT) thermochronology has been applied to investigate the low-temperature cooling and denudation history of the Patagonian Andes along the southern part of the intra-arc transpressional Liquiñe-Ofqui fault zone between 42° and 46°S. The Liquiñe-Ofqui fault is shown to have been the focus of enhanced cooling and denudation initiated between ca. 16 and 10 Ma. Several fault blocks with different cooling histories are identified; these are separated by major oblique- or reverse-slip faults proposed to form the eastern part of a major (crustal-scale) dextral transpression zone. Local very fast rates of cooling and denudation between ca. 7 and 2 Ma were coeval with collision of the Chile Rise (an active mid-oceanic ridge) with the Peru-Chile Trench between ∼47° and 48°S. This location is close to the southern termination of the Liquiñe-Ofqui fault, implying that the collision of the ridge was a major force driving late Cenozoic transpression. The lack of significant cooling and denudation before ca. 16 Ma is indicative of pure strike-slip or transtensional movement along the Liquiñe-Ofqui fault before the collision of the ridge. Digital landscape analysis supports glacial and periglacial erosion as the main contributor to denudation since ca. 7 Ma, leading to restriction of topographic development. The combination of transpression-induced rock uplift and glacial erosion is shown to be very effective at causing localized denudation. Anomalously young FT ages along the Liquiñe-Ofqui fault are attributed to the existence of a late Cenozoic localized heat-flow anomaly along the fault.

Fission-track evidence for Cenozoic uplift of the Nelson batholith, southeastern British Columbia

1989 ◽  
Vol 26 (10) ◽  
pp. 1944-1952 ◽  
Author(s):  
Donald S. Sweetkind ◽  
Ian J. Duncan
Keyword(s):  
British Columbia ◽  
Shear Zone ◽  
Fault Zone ◽  
Fission Track ◽  
Gneiss Dome ◽  
Rapid Cooling ◽  
Zircon Fission Track ◽  
Rapid Uplift

Apatite and zircon fission-track data from the Nelson batholith in southeastern British Columbia reveal that a significant amount of uplift has occurred since Paleocene time, including an episode of rapid uplift during Eocene time. Age versus elevation curves for apatite and zircon, combined with a calculated present depth to the 105 °C apatite-annealing isotherm, suggest that some 6 km of apparent uplift has occurred in the vicinity of the Nelson batholith since Paleocene time. A period of rapid cooling and uplift occurred from 59 to 45 Ma, when the bounding faults of the adjacent Valhalla gneiss dome, the Valkyr shear zone, and the Slocan Lake fault zone were active. The rapid uplift is interpreted as being related to Eocene extension and the rise of the adjacent Valhalla gneiss dome during Eocene time.

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