A5000339710- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- Geological Studies and Exploration
- Astro and Planetary Science
- Geochemistry and Elemental Analysis
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Space Exploration and Technology
- Geomagnetism and Paleomagnetism Studies
- Radioactive element chemistry and processing
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Mineralogy and Gemology Studies
- Isotope Analysis in Ecology
- Clay minerals and soil interactions
- Geological Formations and Processes Exploration
- Groundwater and Isotope Geochemistry
- Pleistocene-Era Hominins and Archaeology
- Geological and Geophysical Studies Worldwide
- Antibiotic Resistance in Bacteria
- Glass properties and applications
Australian National University
2015-2024
UNSW Sydney
2019-2021
University of Maryland, College Park
2015
CHRISTUS Spohn Hospital Corpus Christi - Memorial
2008
Lunar and Planetary Institute
2007
Johnson Space Center
2007
Chinese Academy of Geological Sciences
2007
Woods Hole Oceanographic Institution
2002
Regional Environmental Center for Central and Eastern Europe
2002
University of California, Los Angeles
1979
The oldest rocks—3.85 billion years old—from southwest Greenland have coupled neodymium-142 excesses (from decay of now-extinct samarium-146; half-life, 103 million years) and neodymium-143 samarium-147; 106 years), relative to chondritic meteorites, that directly date the formation chemically distinct silicate reservoirs in first 30 75 Earth history. differences 142 Nd signatures coeval rocks from two most extensive crustal relicts more than 3.6 old, Western Australia Greenland, reveal...
The world's most extensive, well preserved, early Archaean (>3500 Ma) structures occur in the northern end of 3850–3560 Ma Itsaq Gneiss Complex, southern west Greenland, an area which includes 3800–3700 Isua supracrustal belt. These provide a unique opportunity to study tectonics. is dominated by ∼3800–3650 orthogneisses containing migmatized inclusions ≥3800 metavolcanic, sedimentary, ultramafic, and gabbroic rocks. thickest extensive these forms side Also present are panels less...
The Sanandaj–Sirjan Zone is a basement culmination northeast of the Neo-Tethys suture in Iran. In this zone near Azna, granite has magmatic zircon U–Pb age 568 ± 11 Ma, with 900–800, ca. 2400, and 3600 Ma inherited cores. oldest crustal component yet detected Near Chadegan, orthogneiss 637 15 carries 1000 2000 zircons. Inherited 900–1000 zircons have juvenile initial ε Hf values +8 to +9, whereas younger 630 show lower values; however, core = 0.0. A Neoproterozoic rim on most extreme value...
The Cambrian–Ordovician Ross Orogeny in Antarctica produced a voluminous magmatic belt composed mainly of post-orogenic granitoids. This has strong calc-alkaline characteristics reflecting convergent-margin origin associated with subduction paleo-Pacific oceanic lithosphere beneath cratonic East Antarctica. However, it is unclear how and when magmatism began, to what degree was syn-orogenic deformation intra-arc extension. New U–Pb zircon ages, whole-rock geochemical Sr–Nd isotope data for...
From the 3000 km2 Eoarchean Itsaq Gneiss Complex (IGC) of Greenland, zircon U-Pb dating numerous meta-granitoid and orthogneiss samples is integrated with geologic observations, whole rock geochemistry a strategic subset Hf Nd isotopic measurements. This shows that there are multiple episodes TTG suite formation from ∼3890 to 3660 Ma, characterized by initial εHf≈0 εNd > +2. These rocks mostly have geochemical signatures partial melting eclogitized mafic sources, high magnesian, low silica...
Abstract Nolans Bore is a rare earth element (REE) ore deposit in the Reynolds Range, Aileron Province, Northern Territory, Australia. It consists primarily of fluorapatite and alteration products thereof, surrounded by diopside-dominated selvage. Previously considered to form via hydrothermal fluids, we now suggest that formed metasomatic reaction between mantle-derived carbonatite granulite-facies felsic host rocks, after peak metamorphism. REE patterns are strongly light (LREE) enriched,...