A5030821887- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Radiomics and Machine Learning in Medical Imaging
- Nuclear materials and radiation effects
- Solar and Space Plasma Dynamics
- Radioactive element chemistry and processing
- Clinical Nutrition and Gastroenterology
- Healthcare Systems and Challenges
- Metabolism and Genetic Disorders
- Mineralogy and Gemology Studies
- Geological Studies and Exploration
- Mechanisms of cancer metastasis
- Paleontology and Stratigraphy of Fossils
- Radioactivity and Radon Measurements
- Signaling Pathways in Disease
University of Calgary
2022-2024
TU Bergakademie Freiberg
2020-2023
Abstract Cenozoic reactivation of the Paleozoic thick‐skinned fold‐thrust belt southwestern Tian Shan has—as Afghan‐Tajik Basin inversion—been interpreted to be driven by Indian mantle‐lithosphere indentation beneath Pamir. Herein, we date and explore its temporal spatial variations. Three structural domains emerged. In Central Domain (Zeravshan‐Gissar, Vashan), apatite fission‐track (AFT) data—aided Raman‐spectroscopic chemical‐composition discrimination detrital apatites...
Abstract. Zircon Raman dating based on irradiation damage is a debated concept but not an established geo-/thermochronological method. One issue the temperature range of radiation-damage annealing over geological timescales. We conducted isochronal and isothermal experiments radiation-damaged zircons between 500 1000 ∘C for durations 10 min 5 d to describe kinetics. measured widths (Γ) positions (ω) ν1(SiO4), ν2(SiO4), ν3(SiO4) internal bands, external rotation band at ∼974, 438, 1008, 356...
The accuracy and validation of geo‐ thermochronological dating hinges on the availability well‐characterised age reference materials. Mesoproterozoic gabbroic anorthosite FC1 from Duluth Complex, Minnesota is a material for zircon U‐Pb suggested apatite fission‐track dating. We evaluate as (U‐Th)/He material, determine its U‐Pb, age. Our results constrain thermal history FC1, showing that fast cooling occurred between ~ 1099 1040 Ma ≥ 600 °C to 200 °C. data air‐abraded grains give robust...
Abstract Four zircon Raman bands were previously calibrated to give consistent estimates of the accumulated self‐irradiation α‐dose in unannealed volcanic samples. Partial annealing radiation damage produces inconsistent values because differences relative sensitivities. The based on external rotation band ( D ER ) at ∼356 cm −1 and that ν 2 (SiO 4 ∼438 are most least sensitive annealing. / ‐ratio thus provides a numerical estimate extent geologic sample has experienced. This ratio...
Abstract. Data plots of daughter against parent concentration (D–P plots) are a potential tool for analyzing low-temperature thermochronology, similar to isochron in radioisotopic geochronology. Their purposes visualize the main term radiometric age equation – daughter–parent ratio and inspect relationship anomalies indicating influences geological processes or analytical bias. The advantages D–P plot over other data analysis tools (1) its ability detect systematic offsets D P...
Abstract The Schlema-Alberoda deposit in the West Erzgebirge region of Germany was one largest uranium deposits (extraction 80 kilotonnes [kt] U) central and western Europe. It is also a prime example post-Variscan native metal-arsenide mineralization that closely associated with mineralization. This study focuses on nature composition associations occur as high-grade ore shoots across deposit. Fluid inclusions from gangue minerals genetically related to have homogenization temperatures...
Abstract In the Katha Range of central Myanmar, lithologic tracers and pressure‐temperature‐deformation‐time data identify Cambro‐Ordovician, Indian‐affinity Tethyan Himalaya Series, located ∼700 km from their easternmost outcrop in S‐Tibet, ∼450 Himalayan rocks Eastern Syntaxis. Metamorphism began at ∼65 Ma, peaked ∼45 Ma (∼510°C, 0.93 GPa), exhumation/cooling (∼25°C/Myr) occurred until ∼30 a subduction‐early collision tectonic setting. When Burma microplate—part intra‐Tethyan Incertus...
Abstract. Plots of daughter against parent concentration (D-P plots) are widely used as isotope ratio plots in geochronology. Their main purposes are: (1) to visualize the ingredient radiometric age equation – daughter-parent and (2) inspect relationship for anomalous behavior indicating influences geological processes or analytical bias. Despite their benefits, D-P currently not analyzing low-temperature thermochronology data. This contribution aims at putting on map a data analysis tool....
Abstract Portezuelo de Pajas Blancas' primary metasomatic deposits host sapphires that differ in size, colour, and colour distribution through different lithological units. The discovery of sapphire-bearing secondary aeolian placer enabled a detailed analysis sapphire types to determine the causes this heterogeneity. Representative single from were analysed using various techniques, including SEM-CL, OM-CL, Micro-XRF, Raman spectroscopy, polarised transmitted light multi-focus optical...
Cenozoic reactivation of the Paleozoic thick-skinned fold-thrust belt southwestern Tian Shan has—as Afghan-Tajik Basin inversion—been interpreted to reflect Indian mantle-lithosphere indentation underneath Pamir. New low-temperature thermochronologic data, i.e. apatite fission-track (AFT), (AHe), and zircon (ZHe) (U-Th)/He ages, reveal exhumation history SW-Tajik along two N-S-transects. We date explore its temporal spatial variations. Three domains emerged. In Central...
Detrital single‐grain zircon U–Pb geochronology is a powerful tool for provenance studies if information on the source rocks available. This paper proposes new source‐rock classification that uses degree of annealing radiation damage in detrital zircon; expressed by relationship between width (full‐width at half‐maximum; FWHM) v 3 [SiO 4 ] Raman band ~1008 cm −1 and calculated α‐dose. The host zircons are classified into three types according to their emplacement process and/or thermal...
Abstract. We conducted isochronal and isothermal annealing experiments on radiation-damaged zircons between 500 1000 °C for durations ten minutes five days. measured the widths (Γ) positions (ω) of internal ν1(SiO4), ν2(SiO4), ν3(SiO4), external rotation Raman bands at ~ 974, 438, 1008, 356 cm−1. fitted a Johnson-Mehl-Avrami-Kolmogorov distributed activation energy model to fractional data, calculated from bands. From kinetic models, we determined closure temperatures Tc damage accumulation...