Results 31 to 40 of about 6,544,459 (237)
Anais da Academia Brasileira de Ciências, 2009 Since 1964, the Center for Geochronological Research - CPGeo, one of the interdepartmental centers of the Instituto de Geociências (IG) of São Paulo University, has developed studies related to several geological processes associated with different rock ...
Cláudia R. Passarelli +5 more
doaj +1 more source
Exploring the CAM18 Crystal as a Potential Reference Material for U–Pb Analysis of Zircon
Crystals, 2023 In the process of in situ zircon U–Pb dating, it is an effective means to overcome the matrix effect by using a matrix-matched external reference material.
Wurui Li +4 more
doaj +1 more source
Geochronology, 2020 . Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb geochronology of carbonate minerals, calcite in particular, is rapidly gaining popularity as an absolute dating method. The high spatial resolution of LA-ICP-MS U–Pb carbonate
N. Roberts +14 more
semanticscholar +1 more source
Adjustment of small-span masonry arch bridges to present-day demands
Građevinar, 2014 An overview of deterioration mechanisms and damage to masonry arch bridges, methods for inspection of existing structures, and conservative and sophisticated assessment methods, is presented in this paper.
Alex Kindij +2 more
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Detrital zircon geochronology of Paleoproterozoic metasedimentary rocks from Jämsä, Central Finland [PDF]
Bulletin of the Geological Society of FinlandIn this short communication, we present new detrital single grain zircon U-Pb data for six metasedimentary rock samples from Jämsä, Central Finland.
Perttu Mikkola +2 more
doaj +1 more source
NanoSIMS and EPMA dating of lunar zirconolite
Progress in Earth and Planetary Science, 2021 Zirconolite is a common Zr-rich accessary mineral in mafic rocks. It is also an ideal U–Pb/Pb–Pb chronometer because it commonly contains high U content (mostly 0.1–10 wt%) and negligible initial Pb.
Nian Wang +4 more
doaj +1 more source
On the treatment of discordant detrital zircon U–Pb data
Geochronology, 2020 . Zircon U–Pb geochronology is a staple of crustal evolution studies and sedimentary provenance analysis. Constructing (detrital) U–Pb age spectra is straightforward for concordant 206Pb/238U and 207Pb/206Pb compositions.
P. Vermeesch
semanticscholar +1 more source
U-Pb dating of cements in Mesozoic ammonites [PDF]
, 2014 Dating sedimentary carbonates using the U-Pb method can help improve the Phanerozoic timescale. Using a novel combination of laser-ablation, multi-collector, inductively-coupled-plasma, mass-spectrometry (LA–MC–ICP–MS) and thermal ionization multi ...
R. R. Parrish (2842598) +3 more
core +2 more sources
Geochronology, 2020 . Latest advances in laser ablation inductively coupled plasma mass spectrometer (LA-ICPMS) allow for accurate in situ U−Pb dating of carbonate material, with final age uncertainties usually >3 % 2σ.
P. Nuriel +7 more
semanticscholar +1 more source
Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences:the Moine Supergroup, Scottish Caledonides [PDF]
, 2014 This work was in part supported by Natural Environment Research Council grant NE/J021822/1, National Science Foundation grant EAR-0087650, and funds from our respective institutions.Neoproterozoic siliciclastic-dominated sequences are widespread along ...
Merle, Renaud +21 more
core +1 more source