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.

Dating pseudotachylyte of the Asuke Shear Zone using zircon fission-track and U–Pb methods

2006 ◽  
Vol 424 (1-2) ◽  
pp. 99-107 ◽  
Author(s):  
Masaki Murakami ◽  
Jan Košler ◽  
Hideo Takagi ◽  
Takahiro Tagami
Keyword(s):  
Shear Zone ◽  
Fission Track ◽  
Zircon Fission Track

Multiple episodes of Cenozoic denudation in the northeastern Brooks Range: fission-track data from the Okpilak batholith, Alaska

1995 ◽  
Vol 32 (8) ◽  
pp. 1106-1118 ◽  
Author(s):  
Paul B. O'sullivan ◽  
Catherine L. Hanks ◽  
Wesley K. Wallace ◽  
Paul F. Green
Keyword(s):  
Fission Track ◽  
Middle Eocene ◽  
Sedimentary Rocks ◽  
Late Oligocene ◽  
Brooks Range ◽  
Rapid Cooling ◽  
Zircon Fission Track ◽  
Fault Bend ◽  
Thrust Sheets ◽  
Uplift And Erosion

The northeastern Brooks Range of Alaska is a complex Mesozoic to Cenozoic northward-verging fold and thrust belt. In response to regional compression, shortening in the upper crust has occurred through the duplexing of thrust sheets and formation of associated fault-bend folds. Apatite and zircon fission-track data from the Okpilak batholith and adjacent sedimentary rocks exposed within the northeastern Brooks Range provide new constraints on the timing, magnitude, and rate of cooling of these thrust sheets as they were rapidly denuded in response to uplift during Cenozoic time. Fission-track results indicate that a previously recognized episode of Paleocene cooling was followed by at least two younger episodes of rapid cooling during Middle Eocene and Late Oligocene time. The two younger episodes of rapid cooling are interpreted to reflect denudation in response to uplift resulting from Cenozoic thrusting and related folding. As a result of structural thickening, up to 8 km of material was eroded from the top of the batholith between ~41–45 Ma (Middle Eocene). Renewed shortening and emplacement of an underlying thrust sheet at ~25 Ma (Late Oligocene) resulted in at least 2 km of uplift and erosion of sedimentary rocks immediately north of the batholith. These results suggest that, even though Paleocene uplift and erosion may have occurred across the northeastern Brooks Range, the major episode of thrust faulting, responsible for structural emplacement of the batholith into its present position and kilometre-scale denudation, most likely occurred during Middle Eocene time.

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 Dating of a fault zone distributed in the South Kyushu shear zone based on fission-track thermochronology and U-Pb dating

2021 ◽  
Vol 127 (1) ◽  
pp. 25-39
Author(s):  
Shigeru Sueoka ◽  
Koji Shimada ◽  
Shuji Terusawa ◽  
Hideki Iwano ◽  
Tohru Danhara ◽  
...  
Keyword(s):  
Shear Zone ◽  
Fault Zone ◽  
Fission Track ◽  
The South ◽  
Fission Track Thermochronology

Fast extension but little exhumation: the Vari detachment in the Cyclades, Greece

2003 ◽  
Vol 140 (3) ◽  
pp. 245-252 ◽  
Author(s):  
UWE RING ◽  
STUART N. THOMSON ◽  
MICHAEL BRÖCKER
Keyword(s):  
Late Cretaceous ◽  
Fission Track ◽  
Regional Scale ◽  
Slip Rate ◽  
Aegean Sea ◽  
Apatite Fission Track ◽  
Rapid Cooling ◽  
Magmatic Arc ◽  
Zircon Fission Track

Markedly different cooling histories for the hanging- and footwall of the Vari detachment on Syros and Tinos islands, Greece, are revealed by zircon and apatite fission-track data. The Vari/Akrotiri unit in the hangingwall cooled slowly at rates of 5–15 °C Myr−1 since Late Cretaceous times. Samples from the Cycladic blueschist unit in the footwall of the detachment on Tinos Island have a mean zircon fission-track age of 10.0±1.0 Ma, which together with a published mean apatite fission-track age of 9.4±0.5 Ma indicates rapid cooling at rates of at least ∼60 °C Myr−1. We derive a minimum slip rate of ∼6.5 km Myr−1 and a displacement of <∼20 km and propose that the development of the detachment in the thermally softened magmatic arc aided fast displacement. Intra-arc extension accomplished the final ∼6–9 km of exhumation of the Cycladic blueschists from ∼60 km depth. The fast-slipping intra-arc detachments did not cause much exhumation, but were important for regional-scale extension and the formation of the Aegean Sea.

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.

Downstream Changes of Alpine Zircon Fission-Track Ages in the Rhone and Rhine Rivers

2004 ◽  
Vol 74 (1) ◽  
pp. 82-94 ◽  
Author(s):  
M. Bernet ◽  
M. T. Brandon ◽  
J. I. Garver ◽  
B. Molitor
Keyword(s):  
Fission Track ◽  
Zircon Fission Track ◽  
Fission Track Ages
Sign in / Sign up

Export Citation Format

Share Document