A Combined (U‐Th)/He and Cosmogenic 3He Record of Landscape Armoring by Biogeochemical Iron Cycling
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DOI: 10.1002/2017jf004282
Abstract: (U‐Th)/He geochronology and cosmogenic ^3He in iron oxides reveal mineral precipitation ages as old as 55 Ma and exposure ages greater than 5 Ma for canga‐cemented plateaus in the Quadrilatero Ferrifero, Brazil, showing that lateritic… read more here.
Keywords: combined cosmogenic; cosmogenic 3he; record; landscape ... See more keywords
Cosmogenic 3He production rate in ilmenite and the redistribution of spallation 3He in fine-grained minerals
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DOI: 10.1016/j.gca.2019.08.025
Abstract: Cosmogenic nuclide surface exposure dating and erosion rate measurements in basaltic landscapes rely primarily on measurement of ^3He in olivine or pyroxene. However, geochemical investigations using ^3He have been impossible in the substantial fraction of… read more here.
Keywords: production; cosmogenic 3he; fine grained; rate ... See more keywords