40Ar–39Ar dating of pseudotachylytes: the effect of clast-hosted extraneous argon in Cenozoic fault-generated friction melts from the West Antarctic Rift System
Fault-generated pseudotachylytes are the product of frictional melting during high-velocity
slip associated with coseismic faulting. 40Ar–39Ar dating of pseudotachylytes represents a
powerful tool to directly determine the age of brittle faulting which is otherwise dated only
indirectly. However, the pronounced spatial heterogeneity of most endogenically generated
pseudotachylytes, due to the intimate coexistence of unmelted mineral clasts from the
source rock, frictional glass and neogenic igneous minerals, often precludes a …
slip associated with coseismic faulting. 40Ar–39Ar dating of pseudotachylytes represents a
powerful tool to directly determine the age of brittle faulting which is otherwise dated only
indirectly. However, the pronounced spatial heterogeneity of most endogenically generated
pseudotachylytes, due to the intimate coexistence of unmelted mineral clasts from the
source rock, frictional glass and neogenic igneous minerals, often precludes a …
[引用][C] 40@ Ar-39@ Ar dating of pseudotachylytes: the effect of clast-hosted extraneous argon in Cenozoic fault-generated friction melts from the West Antarctic Rift …
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