scholarly journals Low-Temperature Thermochronology of the Chatkal-Kurama Terrane (Uzbekistan-Tajikistan): Insights Into the Meso-Cenozoic Thermal History of the Western Tian Shan

Tectonics ◽  
2018 ◽  
Vol 37 (10) ◽  
pp. 3954-3969 ◽  
Author(s):  
Gilby Jepson ◽  
Stijn Glorie ◽  
Dmitry Konopelko ◽  
Jack Gillespie ◽  
Martin Danišík ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermal History ◽  
History Of ◽  
Tian Shan

Resolving thermal histories via multi-kinetic apatite fission track data: A case study from Phanerozoic strata within the Peel Plateau NWT, Canada

2021 ◽  
Author(s):  
Jennifer Spalding ◽  
Jeremy Powell ◽  
David Schneider ◽  
Karen Fallas
Keyword(s):  
Low Temperature ◽  
Thermal History ◽  
Fission Track ◽  
Sedimentary Basins ◽  
Source Rocks ◽  
Apatite Fission Track ◽  
Petroleum Systems ◽  
History Of ◽  
Thermal Histories ◽  
Peel Plateau

<p>Resolving the thermal history of sedimentary basins through geological time is essential when evaluating the maturity of source rocks within petroleum systems. Traditional methods used to estimate maximum burial temperatures in prospective sedimentary basin such as and vitrinite reflectance (%Ro) are unable to constrain the timing and duration of thermal events. In comparison, low-temperature thermochronology methods, such as apatite fission track thermochronology (AFT), can resolve detailed thermal histories within a temperature range corresponding to oil and gas generation. In the Peel Plateau of the Northwest Territories, Canada, Phanerozoic sedimentary strata exhibit oil-stained outcrops, gas seeps, and bitumen occurrences. Presently, the timing of hydrocarbon maturation events are poorly constrained, as a regional unconformity at the base of Cretaceous foreland basin strata indicates that underlying Devonian source rocks may have undergone a burial and unroofing event prior to the Cretaceous. Published organic thermal maturity values from wells within the study area range from 1.59 and 2.46 %Ro for Devonian strata and 0.54 and 1.83 %Ro within Lower Cretaceous strata. Herein, we have resolved the thermal history of the Peel Plateau through multi-kinetic AFT thermochronology. Three samples from Upper Devonian, Lower Cretaceous and Upper Cretaceous strata have pooled AFT ages of 61.0 ± 5.1 Ma, 59.5 ± 5.2 and 101.6 ± 6.7 Ma, respectively, and corresponding U-Pb ages of 497.4 ± 17.5 Ma (MSWD: 7.4), 353.5 ± 13.5 Ma (MSWD: 3.1) and 261.2 ± 8.5 Ma (MSWD: 5.9). All AFT data fail the χ<sup>2</sup> test, suggesting AFT ages do not comprise a single statistically significant population, whereas U-Pb ages reflect the pre-depositional history of the samples and are likely from various provenances. Apatite chemistry is known to control the temperature and rates at which fission tracks undergo thermal annealing. The r<sub>mro</sub> parameter uses grain specific chemistry to predict apatite’s kinetic behaviour and is used to identify kinetic populations within samples. Grain chemistry was measured via electron microprobe analysis to derive r<sub>mro</sub> values and each sample was separated into two kinetic populations that pass the χ<sup>2</sup> test: a less retentive population with ages ranging from 49.3 ± 9.3 Ma to 36.4 ± 4.7 Ma, and a more retentive population with ages ranging from 157.7 ± 19 Ma to 103.3 ± 11.8 Ma, with r<sub>mr0</sub> benchmarks ranging from 0.79 and 0.82. Thermal history models reveal Devonian strata reached maximum burial temperatures (~165°C-185°C) prior to late Paleozoic to Mesozoic unroofing, and reheated to lower temperatures (~75°C-110°C) in the Late Cretaceous to Paleogene. Both Cretaceous samples record maximum burial temperatures (75°C-95°C) also during the Late Cretaceous to Paleogene. These new data indicate that Devonian source rocks matured prior to deposition of Cretaceous strata and that subsequent burial and heating during the Cretaceous to Paleogene was limited to the low-temperature threshold of the oil window. Integrating multi-kinetic AFT data with traditional methods in petroleum geosciences can help unravel complex thermal histories of sedimentary basins. Applying these methods elsewhere can improve the characterisation of petroleum systems.</p>

scholarly journals Low temperature thermochronology using thermoluminescence signals from K-feldspar

2017 ◽  
Vol 44 (1) ◽  
pp. 112-120 ◽  
Author(s):  
Shuang-Li Tang ◽  
Sheng-Hua Li
Keyword(s):  
Low Temperature ◽  
Thermal History ◽  
Rock Sample ◽  
Heating Temperature ◽  
River Valley ◽  
Equivalent Dose ◽  
Multiple Measures ◽  
Study Protocols ◽  
History Of ◽  
Nujiang River

Abstract Thermoluminescence (TL) and isothermal thermoluminescence (ITL) signals from K-feldspar were studied. The signals from K-feldspar have provided multiple thermometers for thermochronological study. Protocols of multiple aliquot (MA) additive-dose (A) and regenerative-dose (R) have been applied and tested for equivalent dose (De) determinations using TL and ITL signals (MAA-TL, MAR-TL, MAA-ITL and MAR-ITL). Single aliquot regenerative-dose (SAR) protocol was only applied for De determination using ITL signals (SAR-ITL). A 50–60°C translation of heating temperature was necessary for the ITL De values to agree with TL De values. Based on the experiment results and merits-drawbacks comparison of the five tested protocols, the MAR-TL and SAR-ITL are favorable because of their efficiency and accuracy in De determinations. These two protocols were further applied to the samples from the Nujiang River valley and both explicitly demonstrated the thermal history of the samples. They are suitable for K-feldspar thermochronology study. They, as a parallelism of the previous studies of quartz TL and ITL signals, can provide multiple measures for a rock sample with the same thermal history in geo-thermochronological studies.

Jurassic-to-present thermal history of the central High Atlas (Morocco) assessed by low-temperature thermochronology

Terra Nova ◽  
2007 ◽  
Vol 19 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Luis Barbero ◽  
Antonio Teixell ◽  
María-Luisa Arboleya ◽  
Pedro del Río ◽  
Peter W. Reiners ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermal History ◽  
High Atlas ◽  
History Of ◽  
Central High ◽  
Central High Atlas

scholarly journals Beo v1.0: numerical model of heat flow and low-temperature thermochronology in hydrothermal systems

2019 ◽  
Vol 12 (9) ◽  
pp. 4061-4073 ◽  
Author(s):  
Elco Luijendijk
Keyword(s):  
Heat Flux ◽  
Heat Flow ◽  
Low Temperature ◽  
Thermal History ◽  
Land Surface ◽  
Hydrothermal Activity ◽  
Hydrothermal Systems ◽  
Conductive Heat ◽  
History Of ◽  
Spring Temperatures

Abstract. Low-temperature thermochronology can provide records of the thermal history of the upper crust and can be a valuable tool to quantify the history of hydrothermal systems. However, existing model codes of heat flow around hydrothermal systems do not include low-temperature thermochronometer age predictions. Here I present a new model code that simulates thermal history around hydrothermal systems on geological timescales. The modelled thermal histories are used to calculate apatite (U–Th)∕He (AHe) ages, which is a thermochronometer that is sensitive to temperatures up to 70 ∘C. The modelled AHe ages can be compared to measured values in surface outcrops or borehole samples to quantify the history of hydrothermal activity. Heat flux at the land surface is based on equations of latent and sensible heat flux, which allows more realistic land surface and spring temperatures than models that use simplified boundary conditions. Instead of simulating fully coupled fluid and heat flow, the code only simulates advective and conductive heat flow, with the rate of advective fluid flux specified by the user. This relatively simple setup is computationally efficient and allows running larger numbers of models to quantify model sensitivity and uncertainty. Example case studies demonstrate the sensitivity of hot spring temperatures to the depth, width and angle of permeable fault zones, and the effect of hydrothermal activity on AHe ages in surface outcrops and at depth.

Tectono-thermal history of the Kaoko Belt, Namibia: An integrated low temperature thermochronology study

2006 ◽  
Vol 70 (18) ◽  
pp. A374
Author(s):  
F.F. Luft ◽  
M.J. Raab ◽  
R.W. Brown ◽  
B.P. Kohn ◽  
A.J.W. Gleadow
Keyword(s):  
Low Temperature ◽  
Thermal History ◽  
History Of ◽  
Kaoko Belt

scholarly journals Beo v1.0: Numerical model of heat flow and low-temperature thermochronology in hydrothermal systems

2019 ◽  
Author(s):  
Elco Luijendijk
Keyword(s):  
Heat Flux ◽  
Heat Flow ◽  
Low Temperature ◽  
Thermal History ◽  
Land Surface ◽  
Hydrothermal Activity ◽  
Hydrothermal Systems ◽  
Conductive Heat ◽  
History Of ◽  
Spring Temperatures

Abstract. Low-temperature thermochronology can provide records of the thermal history of the upper crust and can be a valuable tool to quantify the history of hydrothermal systems. However, existing model codes of heat flow around hydrothermal systems do not include low-temperature thermochronology. Here I present a new model code that simulates thermal history around hydrothermal systems on geological timescales. The modelled thermal histories are used to calculate apatite (U-Th)/He (AHe) ages, which is a thermochronometer that is sensitive to temperatures up to 70 °C. The modelled AHe ages can be compared to measured values in surface outcrops or borehole samples to quantify the history of hydrothermal activity. Heat flux at the land surface is based on equations of latent and sensible heat flux, which allows more realistic land surface and spring temperatures than models that use simplified boundary conditions. Instead of simulating fully coupled fluid and heat flow, the code only simulates advective and conductive heat flow, with the rate of advective fluid flux specified by the user. This relatively simple setup is computationally efficient and allows running larger numbers of models to quantify model sensitivity and uncertainty. Example case studies demonstrate the sensitivity of hot spring temperatures to the depth, width and angle of permeable fault zones, and the effect of hydrothermal activity on AHe ages in surface outcrops and at depth.

Mesozoic tectonic evolution and thermal history of the Yuanba area of northeast Sichuan basin—low-temperature thermochronology of apatite and zircon

2013 ◽  
Vol 24 (4) ◽  
pp. 599-605 ◽  
Author(s):  
Jie Wang ◽  
Tenger Boltsjun ◽  
Jianzhong Qin ◽  
Wenhui Liu ◽  
Cheng Tao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermal History ◽  
Tectonic Evolution ◽  
Sichuan Basin ◽  
History Of ◽  
Northeast Sichuan Basin
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