Low-temperature thermal evolution of the Azov Massif (Ukrainian Shield–Ukraine) — Implications for interpreting (U–Th)/He and fission track ages from cratons

Thermochronological constraints on the long-term erosional history of the Karkonosze Mts., Central Europe

“…Degassed zircon was dissolved following the procedure of Evans et al (2005) and analysed by ID ICP MS for U and Th at TSW Analytical Ltd in the University of Western Australia (Perth) on an Agilent 7500 mass spectrometer. For more details on analytical procedures, the reader is referred to Evans et al (2005) and Danišík et al (2008).…”

Interpreting data dispersion and “inverted” dates in apatite (U–Th)/He and fission-track datasets: An example from the US midcontinent

“…These techniques have been jointly applied in numerous studies to better restrict timetemperature (tT) paths. Several datasets, however, most notably from cratonic settings, have highlighted two aspects of low temperature thermochronometry data that require additional examination: some cratonic AHe data are characterized by significant dispersion, and a number of reported cratonic AHe datasets conflict with corresponding AFT dates when using conventional models for apatite He retentivity (e.g., Crowley et al, 2002;Spotila et al, 2004;Hendriks and Redfield, 2005;Hansen and Reiners, 2006;Danisik et al, 2008;Kohn et al, 2009). Cratonic AHe and AFT data have therefore become the focal point of a controversy over the cause(s) of inconsistency between the techniques (e.g., .…”

Closure temperature of (U-Th)/He system in apatite obtained from natural drillhole samples in the Tarim basin and its geological significance

“…Recent studies have discovered that apatite He ages in some cratons are older than the corresponding fission-track ages due to various causes, such as radiation-enhanced annealing, change in He retention properties, alpha ejection correction, radiation damage, and cooling time [17][18][19][20]. The alpha ejection correction of raw (U-Th)/He ages leads to erroneous high ages with respect to relatively slow-cooling apatite [20].…”

“…The alpha ejection correction of raw (U-Th)/He ages leads to erroneous high ages with respect to relatively slow-cooling apatite [20]. The radiation damage accumulation and annealing model proposed by Flowers et al [8] can explain some cases where the apatite He ages are older than the corresponding fission track ages.…”