A5011213490- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Geological and Geophysical Studies Worldwide
- Hydrocarbon exploration and reservoir analysis
- Geological and Geophysical Studies
- Geological Formations and Processes Exploration
- Astro and Planetary Science
- Geochemistry and Elemental Analysis
- Geomagnetism and Paleomagnetism Studies
- Radioactive element chemistry and processing
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Geological Modeling and Analysis
- Mineralogy and Gemology Studies
- Archaeological and Geological Studies
- Pleistocene-Era Hominins and Archaeology
- Nuclear materials and radiation effects
- Radioactive contamination and transfer
- Tunneling and Rock Mechanics
- Evolution and Paleontology Studies
University of Oslo
2015-2024
UiT The Arctic University of Norway
2018
Charles University
2018
Western University
2011
University of Toronto
2011
University of Alberta
2011
Norwegian Geological Survey
2011
University of the Witwatersrand
2011
University of Münster
2011
Universidad Complutense de Madrid
2007
We report here the results of a study to develop natural zircon geochemical standards for calibrating U‐(Th)‐Pb geochronometer and Hf isotopic analyses. Additional data were also collected major, minor trace element contents three selected sample sets. A total five large grains (masses between 0.5 238 g) this study, representing different suites zircons with ages 1065 Ma, 2.5 Ma 0.9 Ma. Geochemical laboratories can obtain these materials by contacting Geostandards Newsletter.
Research Article| January 02, 2003 Atlas of Zircon Textures Fernando Corfu; Corfu Institute Geology, University Oslo, P B 1047 Blindern, N-0316 Norway Search for other works by this author on: GSW Google Scholar John M. Hanchar; Hanchar Department Earth and Environmental Sciences, The George Washington University, Washington, D.C. 20006 Paul W.O. Hoskin; Hoskin Institut für Mineralogie, Petrologie und Geochemie, Albert-Ludwigs-Universität Freiburg, D-79104 Germany Peter Kinny Applied Curtin...
We introduce and propose zircon M257 as a future reference material for the determination of U‐Pb ages by means secondary ion mass spectrometry. This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14 g (25.7 carats). Zircon has TIMS‐determined, mean isotopic ratios (2s uncertainties) 0.09100 ± 0.00003 206 pb/ 238 U 0.7392 0.0003 207 235 U. Its age is 561.3 0.3 Ma (unweighted mean, uncertainty quoted at 95% confidence level); system concordant within decay constants....
An igneous zircon reference material (OG1) was characterised for U‐Pb isotopes by ID‐TIMS, and utilised to evaluate SIMS (SHRIMP) instrumental mass fractionation (IMF) of radiogenic Pb ( 207 Pb*/ 206 Pb*). The TIMS Pb* value OG1 0.29907 ± 0.00011 (95% confidence limit), 3465.4 0.6 Ma. high (∼ 30 μg g −1 ), negligible common Pb, isotopic homogeneity permitted precise (± 1–2‰) measurements within the analytical sessions. External reproducibility mean ratios between sessions demonstrated one...
A potential zircon reference material ( BB zircon) for laser ablation‐inductively coupled plasma‐mass spectrometry LA ‐ ICP MS ) U‐Pb geochronology and Hf isotope geochemistry is described. batch of twenty megacrysts (0.5–1.5 cm 3 from Sri Lanka was studied. Within‐grain rare earth element REE compositions are largely homogeneous, albeit with some variation seen between fractured homogeneous domains. Excluding cathodoluminescence bright domains, the in U content all analysed crystals ranged...
Faunal and palaeomagnetic evidence suggests the existence of a c. 3000 km-wide Tornquist Sea between Gondwana Baltica in Early Ordovician times, which narrowed to <1000 km by Late Ordovician. The inferred suture zone sequences with ‘Baltic’ faunas Poland ‘Gondwana’ Czechoslovakia is characterized collage six terranes have distinct Cambrian Carboniferous histories. They geochemical characteristics sedimentary associations volcanic rocks marginal basins, island arcs, ophiolites arc...
Mangerites, charnockites, anorthosites, gabbros and granites occur within a high-grade metamorphic complex in the Lofoten–Vestera ulen islands of northern Norway. U–Pb dating zircon, titanite monazite indicates three-stage magmatic history beginning at 1870–1860 Ma with emplacement Lodingen Hopen plutons, followed by dominant stage 1800–1790 that formed bulk suite, concluded pegmatites, local rehydration retrogression between 1790 1770 Ma. On scale Baltic Shield episode corresponds to...
The Abitibi Belt is the largest continuous greenstone belt in Superior Province of Canadian Shield. It comprises several composite komatiitic–tholeiitic–calc-alkalic and sedimentary sequences that are folded, transected by major faults, intruded various generations plutonic rocks. Precise U–Pb geochronology has been carried out for past decade to solve chronostratigraphic metallogenetic problems. This paper presents new zircon ages reassesses previously published ones, now refined addition...
Concordant baddeleyite and rutile analyses from mineralized Nipissing diabase at Gowganda's Castle mine yield a U–Pb age of [Formula: see text]. Baddeleyite is primary phase the diabase; therefore dates magmatic emplacement. The genesis less certain: could have formed during an episode alteration, veining, Ag mineralization, in which case would also date secondary event demonstrate that mineralization was related to magmatism. However, origin cannot be completely excluded for now; thus may...
Abstract Thirty years of research, and especially the refinements many geological, geochemical geophysical techniques, have uncovered new facets geology Scandinavian Caledonides, also correcting some fundamental misconceptions. Our present understanding is that a sequence allochthons, derived from Baltica, but others probably exotic origin, in part Laurentian margin collided with perhaps other parts Rodinia. The paper summarizes main features proposing rethinking traditional schemes, which...
Abstract The opening of the Arctic oceanic basins in Mesozoic and Cenozoic proceeded steps, with episodes magmatism sedimentation marking specific stages this development. In addition to stratigraphic record provided by sediments fossils, intrusive extrusive rocks yield important information on evolution. This study has determined ages mafic sills a felsic tuff Svalbard Franz Josef Land using isotope dilution thermal ionization mass spectrometry (ID-TIMS) U–Pb method zircon, baddeleyite,...