Publication Date:
2023-11-17
Description:
〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Detrital single‐grain zircon U–Pb geochronology is a powerful tool for provenance studies if information on the source rocks is available. This paper proposes a new source‐rock classification tool that uses the degree of annealing of radiation damage in detrital zircon; the annealing is expressed by the relationship between the width (full‐width at half‐maximum; FWHM) of the 〈italic toggle="no"〉v〈/italic〉〈sub〉3〈/sub〉[SiO〈sub〉4〈/sub〉] Raman band at ~1008 cm〈sup〉−1〈/sup〉 and the calculated α‐dose. The host rocks of the zircons are classified into three types according to their emplacement process and/or thermal history: volcanic and rapidly cooled plutonic and high‐grade metamorphic rocks (type 1); rocks with hydrothermal zircons (type 2); slowly cooled igneous and metamorphic rocks (type 3). We construct a naive Bayes prediction model by training it with a collection of zircons of known types. The unknown zircons are assigned a probability of derivation from a specific host‐rock type. This classification scheme is best used as an accessory tool in provenance studies that apply detrital zircon U–Pb geochronology.〈/p〉
Description:
〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Zircons are classified into three types based on annealing state revealed by Raman analysis and calculated α‐dose. This classification can be used to distinguish zircon in provenance study.〈boxed-text position="anchor" content-type="graphic" id="gj4751-blkfxd-0001" xml:lang="en"〉
〈graphic position="anchor" id="jats-graphic-1" xlink:href="urn:x-wiley:00721050:media:gj4751:gj4751-toc-0001"〉
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〈/boxed-text〉〈/p〉
Description:
Natural Science Foundation of Hubei Province
http://dx.doi.org/10.13039/501100003819
Description:
National Natural Science Foundation of China
http://dx.doi.org/10.13039/501100001809
Keywords:
ddc:549
;
annealing
;
Bayesian probability
;
provenance analysis
;
radiation damage
;
zircon classification
Language:
English
Type:
doc-type:article
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