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7404 pdf datasheet
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大小:333 |
2008-08-06
张亮
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Introduction: The Pb isotope system in feldspar is
a powerful fingerprint, recording near-initial isotope
ratios due to the very low ratios of U and Th to Pb in
this mineral group, especially in K-feldspar. This same
mineral group also has demonstrated applicability for
40Ar/39Ar geochronology. Procedures that allow multiple
proxies to be obtained on the same samples have a
great deal of value, and the combination of age and
initial Pb isotope composition of feldspar has wide
potential application in studies of volcanic stratigraphy
as well as sedimentary provenance.
a powerful fingerprint, recording near-initial isotope
ratios due to the very low ratios of U and Th to Pb in
this mineral group, especially in K-feldspar. This same
mineral group also has demonstrated applicability for
40Ar/39Ar geochronology. Procedures that allow multiple
proxies to be obtained on the same samples have a
great deal of value, and the combination of age and
initial Pb isotope composition of feldspar has wide
potential application in studies of volcanic stratigraphy
as well as sedimentary provenance.
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