Isotopic compositions of lead and strontium and concentrations of lead, uranium, thorium, rubidium, and strontium were measured in a suite of volcanic rocks, ranging from basalt to rhyodacite in composition, and in granite and gabbro xenoliths from a traverse across northern Honshu. The observed 238U/204Pb (μ) ratio ranges from 2.4 in tholeiitic basalt at the east end of the traverse to 11.6 in alkalic basalt from the west end. The isotopic composition is slightly less radiogenic to the west. The 87Sr/86Sr ratios of most of the samples fall within the range observed in oceanic basalts, but the granite xenolith and the rhyodacite are slightly more radiogenic.
|Publication Subtype||Journal Article|
|Title||Lead and strontium isotopes in volcanic rocks from northern Honshu, Japan|
|Series title||Geochemical Journal|
|Publisher||The Geochemical Society of Japan|
|Other Geospatial||Ichinoma Gata, Iwate, Kampu-zan, Moriyosi, Osima-Osima|
|Google Analytic Metrics||Metrics page|