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Title: Beam-induced back-streaming electron suppression analysis for an accelerator type neutron generator designed for 40 Ar / 39 Ar geochronology

Authors:
; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1414009
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Applied Radiation and Isotopes
Additional Journal Information:
Journal Volume: 125; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-12-19 02:32:49; Journal ID: ISSN 0969-8043
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Waltz, Cory, Ayllon, Mauricio, Becker, Tim, Bernstein, Lee, Leung, Ka-Ngo, Kirsch, Leo, Renne, Paul, and Bibber, Karl Van. Beam-induced back-streaming electron suppression analysis for an accelerator type neutron generator designed for 40 Ar / 39 Ar geochronology. United Kingdom: N. p., 2017. Web. doi:10.1016/j.apradiso.2017.04.017.
Waltz, Cory, Ayllon, Mauricio, Becker, Tim, Bernstein, Lee, Leung, Ka-Ngo, Kirsch, Leo, Renne, Paul, & Bibber, Karl Van. Beam-induced back-streaming electron suppression analysis for an accelerator type neutron generator designed for 40 Ar / 39 Ar geochronology. United Kingdom. doi:10.1016/j.apradiso.2017.04.017.
Waltz, Cory, Ayllon, Mauricio, Becker, Tim, Bernstein, Lee, Leung, Ka-Ngo, Kirsch, Leo, Renne, Paul, and Bibber, Karl Van. Sat . "Beam-induced back-streaming electron suppression analysis for an accelerator type neutron generator designed for 40 Ar / 39 Ar geochronology". United Kingdom. doi:10.1016/j.apradiso.2017.04.017.
@article{osti_1414009,
title = {Beam-induced back-streaming electron suppression analysis for an accelerator type neutron generator designed for 40 Ar / 39 Ar geochronology},
author = {Waltz, Cory and Ayllon, Mauricio and Becker, Tim and Bernstein, Lee and Leung, Ka-Ngo and Kirsch, Leo and Renne, Paul and Bibber, Karl Van},
abstractNote = {},
doi = {10.1016/j.apradiso.2017.04.017},
journal = {Applied Radiation and Isotopes},
number = C,
volume = 125,
place = {United Kingdom},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.apradiso.2017.04.017

Citation Metrics:
Cited by: 1work
Citation information provided by
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  • Mesothermal/epithermal gold mineralization at Porgera in the highlands of Papua New Guinea (PNG), occurs in structurally controlled veins and disseminations, which overprint and cross-cut a suite of shallow-level, comagmatic, mafic alkaline stocks and dykes and their sedimentary host rocks. Conventional K-Ar apparent ages of twelve hornblende separates from eight different intrusions scatter between 7 and 14 Ma, but four biotite separates are concordant at 6.02 {plus minus} 0.29 Ma (2{sigma}). {sup 40}Ar/{sup 39}Ar step-heating experiments on six of the hornblende separates reveal saddle-shaped age spectra, which indicate the presence of excess {sup 40}Ar. One of these samples yields a well-definedmore » plateau with an apparent age of 5.96 {plus minus} 0.25 Ma (2{sigma}). Conventional K-Ar analyses of six separates of hydrothermal illite and roscoelite associated with gold mineralization yield apparent ages of between 5.1 and 6.1 Ma and indicate that ore deposition occurred within 1 Ma of magmatism at Porgera. Evidence for the evolution of a magmatic volatile phase, and the presence of excess {sup 40}Ar both in the intrusives and in hydrothermal fluids associated with the orebody, suggest that magmatic fluids may have had some involvement in metallogenesis, but the exact nature of this involvement is not yet clear. Late Miocene magmatism and mineralization at Porgera are thought to have occurred shortly prior to or during the initiation of continent/arc collision and to pre-date associated Pliocene uplift and foreland deformation in the highlands.« less
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