U–Pb zircon geochronology of Cretaceous arc magmatism in eastern Chukotka, NE Russia, with implications for Pacific plate subduction and the opening of the Amerasia Basin
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Published:January 01, 2018
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CiteCitation
Victoria Pease, Elizabeth Miller, Sandra J. Wyld, Sergey Sokolov, Viacheslav Akinin, James E. Wright, 2018. "U–Pb zircon geochronology of Cretaceous arc magmatism in eastern Chukotka, NE Russia, with implications for Pacific plate subduction and the opening of the Amerasia Basin", Circum-Arctic Lithosphere Evolution, V. Pease, B. Coakley
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Abstract
The tectonomagmatic evolution of eastern Chukotka, NE Russia, is important for refining the onset of Pacific plate subduction, understanding the development of the Amerasia Basin, and constraining Arctic tectonic reconstructions. Field mapping and strategic sample collection provide relative age constraints on subduction-related continental arc magmatism in eastern Chukotka. Ion microprobe U–Pb zircon ages provide absolute constraints and identify five magmatic episodes (c. 134, 122, 105, 94 and 85 Ma) separated by three periods of uplift and erosion (c. 122–105, 94–85 and post-85 Ma). Volcanic rocks in the region are less contaminated than their plutonic equivalents which record...
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Contents
Circum-Arctic Lithosphere Evolution
CONTAINS OPEN ACCESS
GeoRef
- absolute age
- Alaska
- Amerasia Basin
- Arctic Ocean
- Arctic region
- Asia
- back-arc basins
- basins
- Bering Strait
- cathodoluminescence
- chemical composition
- Chukotka Russian Federation
- Commonwealth of Independent States
- correlation
- Cretaceous
- erosion
- extension tectonics
- ion probe data
- magmatism
- mass spectra
- Mesozoic
- nesosilicates
- orthosilicates
- Pacific Plate
- paleogeography
- plate tectonics
- regional
- Russian Federation
- silicates
- spectra
- stratigraphy
- subduction
- succession
- tectonics
- tectonostratigraphic units
- U/Pb
- unconformities
- United States
- uplifts
- zircon
- zircon group
- Provideniya Russian Federation
- Chaplino Russian Federation