Intracrustal extension of an Archean orogen revealed using single-gain U-Pb zircon geochronology

Article Abstract:

Single-grain U-Pb zircon dating techniques were used to bracket the age of subhorizontal shear zones that formed during the orogen-parallel extension in the Wawa geiss domain. Specifically, these techniques were used to determine, in four outcrops, the ages of meter-scale igneous bodies that crystallized prior to and after the extension. Results showed that the time of extension was limited to the interval between 2660 and 2645 Ma.

Research, Geological time, Geochronology

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Paleozoic rocks of northern Chukotka Peninsula, Russian Far East: Implications for the tectonics of the Arctic region

Article Abstract:

The correlation of Late Proterozoic and Paleozoic rocks of the Chegitun River valley with similar age rocks in the Siberian/northern Alaska area of the Arctic, was investigated. This data was used to review the Paleozoic tectonic evolution of northeastern Russia and northern Alaska.

Russia, Natural history, Geology, Stratigraphic, Stratigraphy, Paleozoic Era

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