A5015738382- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Geological Studies and Exploration
- Mineralogy and Gemology Studies
- Astro and Planetary Science
- Hydrocarbon exploration and reservoir analysis
- Isotope Analysis in Ecology
- Planetary Science and Exploration
- Archaeology and ancient environmental studies
- Geological and Geophysical Studies Worldwide
- Geochemistry and Geochronology of Asian Mineral Deposits
- Pleistocene-Era Hominins and Archaeology
- Radioactive element chemistry and processing
- Geomagnetism and Paleomagnetism Studies
- Geological and Geophysical Studies
- Geological Modeling and Analysis
- Stellar, planetary, and galactic studies
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
- Laser-induced spectroscopy and plasma
- Astronomical Observations and Instrumentation
ETH Zurich
2016-2025
University of Geneva
2012-2022
University of Milan
2022
Institute of Geochemistry
2015-2022
Board of the Swiss Federal Institutes of Technology
2021
École Polytechnique Fédérale de Lausanne
2018
University of Göttingen
2009
Determining the absolute duration of magmatic-hydrothermal events leading to formation porphyry systems (i.e., including copper, skarn, and epithermal deposits) is one key questions in ore geology. This so because instrumental development genetic models necessary explore a category mineral deposits that provide most copper significant amounts base precious metals our economy. The problem determining has been addressed through thermal modeling cooling intrusions time needed precipitate...
Research Article| August 01, 2013 Tracking the evolution of large-volume silicic magma reservoirs from assembly to supereruption Jörn-Frederik Wotzlaw; Wotzlaw * 1Section Earth and Environmental Sciences, University Geneva, 1205 Switzerland *E-mail: joern.wotzlaw@unige.ch. Search for other works by this author on: GSW Google Scholar Urs Schaltegger; Schaltegger Daniel A. Frick; Frick 2Laboratory Inorganic Chemistry, ETH Zurich, 8093 Michael Dungan; Dungan Switzerland3Department Geological...
Research Article| July 01, 2014 Towards accurate numerical calibration of the Late Triassic: High-precision U-Pb geochronology constraints on duration Rhaetian Jörn-Frederik Wotzlaw; Wotzlaw * 1Section Earth and Environmental Sciences, University Geneva, 1201 Switzerland *E-mail: joern.wotzlaw@unige.ch. Search for other works by this author on: GSW Google Scholar Jean Guex; Guex 2Institute Lausanne, 1015 Annachiara Bartolini; Bartolini 3Muséum National d'Histoire Naturelle, 75005 Paris,...
Abstract Large-volume caldera-forming eruptions of silicic magmas are an important feature continental volcanism. The timescales and mechanisms assembly the magma reservoirs that feed such as well durations physical conditions upper-crustal storage remain highly debated topics in volcanology. Here we explore a comprehensive data set isotopic (O, Hf) chemical proxies precisely U-Pb dated zircon crystals from all Yellowstone supervolcano. Analysed zircons record rapid multiple by repeated...
Abstract The Milankovitch theory of climate change is widely accepted, but the registration changes in stratigraphic record and their use building high-resolution astronomically tuned timescales has been disputed due to complex fragmentary nature record. However, results time series analysis consistency with independent magnetobiostratigraphic and/or radio-isotopic age models show that cycles are recorded not only deep marine lacustrine successions, also ice cores speleothems, eolian fluvial...
Research Article| September 01, 2014 Linking rapid magma reservoir assembly and eruption trigger mechanisms at evolved Yellowstone-type supervolcanoes Jörn-Frederik Wotzlaw; Wotzlaw * 1Section of Earth Environmental Sciences, University Geneva, 1205 Switzerland *E-mail: joern.wotzlaw@unige.ch. Search for other works by this author on: GSW Google Scholar Ilya N. Bindeman; Bindeman 2Department Geological Oregon, Eugene, Oregon 97403, USA Kathryn E. Watts; Watts 3U.S. Survey, 345 Middlefield...
Accessory mineral U–Pb geochronology by isotope dilution thermal ionization mass spectrometry (ID-TIMS) requires precise and accurate determinations of parent–daughter ratios.
Abstract Economically important porphyry Cu-Mo deposits (PCDs) are generally hosted by upper-crustal plutons of variable chemical compositions related to distinct geodynamic settings. The absolute timing and duration pluton assembly PCD formation critical understanding the genetic relationship between these interrelated processes. Here, we present new comprehensive zircon U-Pb molybdenite Re-Os ages that tightly constrain age mineralization in one largest ore-bearing central Tethyan...
Abstract. Latest advances in laser ablation inductively coupled plasma mass spectrometer (LA-ICPMS) allow for accurate situ U−Pb dating of carbonate material, with final age uncertainties usually >3 % 2σ. Cross-laboratory reference materials (RMs) used sample-bracketing are currently limited to WC1 calcite an 254.4±6.5 (2σ). The minimum uncertainty on any determination the LA-ICPMS method is therefore ≥2.5 %, and validation by secondary RMs performed in-house standards. This contribution...
Geological field relationships combined with spatially resolved geochemistry and high-precision U-Pb geochronology of zircons allow quantification magmatic processes leading to porphyry emplacement Au-Cu ore formation at Ok Tedi, the Earth's youngest giant porphyry-skarn deposit.Trace element contents in were obtained by LA-ICP-MS before selected grains removed from sample mount, chemically abraded, spiked dissolved for high precision CA-ID-TIMS.U-Pb LA-SF-ICP-MS on abundant inherited zircon...
Abstract. We document that the reliability of carbonate U–Pb dating by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is improved matching aspect ratio LA single-hole drilling craters and propagating long-term excess variance systematic uncertainties. investigated impact different matrices crater geometries using isotope analyses one primary (WC-1) two secondary reference materials (RMs). Validation RMs (VRMs) include a previously characterised (ASH-15D) new...
Abstract Crustal-scale magmatic systems act as filters between the mantle and atmosphere, can generate large volcanic eruptions that pose significant hazards while altering Earth’s climate. Quantifying growth rates, magma fluxes, duration of storage at different crustal levels is crucial for understanding such systems, but these parameters are poorly constrained due to scarcity exposed sections. Here we present first detailed reconstruction emplacement differentiation time scales a complete...
This paper presents U, Pb isotopic data of synthetic EARTHTIME solutions and natural reference materials together with suggestions how to ensure long-term intra- inter-laboratory reproducibility high-precision TIMS U–Pb geochronology.
Abstract U-Pb geochronology by isotope dilution–thermal ionization mass spectrometry (ID-TIMS) has the potential to be most precise and accurate of deep time chronometers, especially when applied high-U minerals such as zircon. Continued analytical improvements have made this technique capable regularly achieving better than 0.1% precision accuracy dates from commonly occurring across a wide range geological ages settings. To help maximize long-term utility published results, we present...
Eocene gem zircons from Reddistone Creek, Glen Innes, Australia, have been assessed for isotopic and chemical homogeneity by Secondary Ion Mass Spectrometry (SIMS), Isotope Dilution Thermal Ionization (ID TIMS), Laser Ablation-Inductively Coupled Plasma-Mass (LA-ICP-MS), Wavelength Dispersive X-ray analysis (WDS). Sensitive High-Resolution Microprobe (SHRIMP) SIMS data show that the U-Pb Th-Pb isotope systems are homogeneous at ion microprobe spot mass of a few ng two zircons, AusZ2 AusZ5,...
Bridging the gap between plutonic and volcanic realms is essential for understanding a variety of magmatic processes from caldera-forming eruptions to formation magmatic-hydrothermal ore deposits. Porphyry copper deposits are commonly associated with large long-lived centers, but temporal dynamic link mineralized intrusions has remained controversial. Based on combination (1) high-precision zircon U-Pb geochronology trace element geochemistry (2) plagioclase textures, we discovered an...
Volatile-rich intermediate to silicic magmatic systems can feed devastating volcanic eruptions but also generate valuable magmatic-hydrothermal ore deposits that supply most of the world's copper. Understanding geometry, dynamics and timescales these is critical in developing models for predicting occurrence future large eruptions. Here, we use zircon petrochronology from an equigranular monzonite successively emplaced porphyry dykes reconstruct time – temperature composition evolution magma...
Since the onset of plate tectonics, continents have evolved through a balance between crustal growth, reworking, and recycling at convergent margins. The term "reworking" involves re-insertion material into pre-existing volumes, while growth respectively represent gains from losses to mantle. Reworking that occurs in mantle wedge ("source" contamination slab material) or within upper ("path" contamination), will contrasting effects on evolution. However, due limited access deep rocks,...