DOI: 10.1002/grl.50745
论文题名: Impact thermochronology and the age of Haughton impact structure, Canada
作者: Young K.E. ; Van Soest M.C. ; Hodges K.V. ; Watson E.B. ; Adams B.A. ; Lee P.
刊名: Geophysical Research Letters
ISSN: 0094-8728
EISSN: 1944-8459
出版年: 2013
卷: 40, 期: 15 起始页码: 3836
结束页码: 3840
语种: 英语
英文关键词: (U-Th)/He thermochronology
; Haughton crater
; impact dating
Scopus关键词: Accessory minerals
; Haughton crater
; impact dating
; Impact structures
; Isotopic systematics
; Theoretical calculations
; Thermochronology
; Zircon (U-Th)/He
; Geochronology
; Isotopes
; Silicate minerals
; helium
; impact structure
; isotopic analysis
; melting
; resetting
; thermochronology
; Canada
英文摘要: Most successful efforts to determine the ages of impact events are based on the isotope geochronology of crystalline or glassy impact melts. Studies of impact sites on Earth show that many form without significant melt production, meaning that traditional geochronologic approaches can yield unsatisfying results. We describe here an alternative approach based on theoretical calculations that even brief thermal events related to impact can reset the isotopic systematics of unmelted target rocks. Thermochronometers based on the production of radiogenic 4He in accessory minerals are particularly amenable to complete resetting by impact and should yield robust impact ages if helium systematics are not further disturbed during post-impact thermal events. We illustrate the utility of this method through a presentation of a new zircon (U-Th)/He date for the Haughton impact structure, Canada, of 23.5 ± 2.0 Ma. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880945575&doi=10.1002%2fgrl.50745&partnerID=40&md5=d1e311dccb2afb2015ed09cf45d4211a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5992
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Space Exploration, Arizona State University, PO Box 876004, Tempe, AZ 85287-6004, United States
Recommended Citation:
Young K.E.,Van Soest M.C.,Hodges K.V.,et al. Impact thermochronology and the age of Haughton impact structure, Canada[J]. Geophysical Research Letters,2013-01-01,40(15).