Christopher S. Holm-Denoma

TL;DR: In this article, the authors proposed a new approach for in situ LA-ICPMS dating of cassiterite, which benefits from the unique chemistry of cassitite with extremely low Th concentrations (Th/U ratio of 10−4 or lower) in some cassite samples.

TL;DR: In this article, a combination of several techniques, including ID-TIMS and high spatial resolution geochronology of apatite and monazite using LA-SC-ICPMS and SHRIMP, and Pb isotope geochemistry of pyrite and magnetite was employed to obtain the first direct age constraints on the formation and alteration history of the Pea Ridge IOA deposit.

TL;DR: A total of 4344 U-Pb ages in the range 2300 to 800 Ma have been compiled from the Great Proterozoic Accretionary Orogen along the margin of the Columbia / Nuna supercontinent and from the subsequent Grenvillian collisional orogens forming the core of Rodinia as discussed by the authors .

TL;DR: In this article, the authors show that fault-dismembered segments of a distinctive, extensive, highly allochthonous, and tectonically significant Ordovician (ca. 480-460 Ma) basin, which contains suites of bimodal metavolcanic rocks, associated base metal deposits, and thick immature deepwater (turbiditic) metasediments, occur in parts of the southern Appalachian Talladega belt, eastern Blue Ridge, and Inner Piedmont of Alabama, Georgia, and North and South Carolina.

TL;DR: In this paper, a Bayesian model for estimating the ages of sedimentary sections is presented. But the model is restricted to the case of a single sample and the assumption that the sediment units must obey stratigraphic ordering.