LEAD AND STRONTIUM ISOTOPES IN VOLCANIC ROCKS FROM NORTHERN HONSHU, JAPAN.
LEAD AND STRONTIUM ISOTOPES IN VOLCANIC ROCKS FROM NORTHERN HONSHU, JAPAN.
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日本本州北部火山岩中的铅和锶同位素。
DOI：
10.2343/geochemj.3.15
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发表时间：
1969
影响因子：
0.8
通讯作者：
R. Knight
中科院分区：
文献类型：
--
作者：
C. Hedge;R. Knight
测定了本州北部一套从玄武岩到流纹岩的火山岩和花岗岩、辉长岩包体中铅、锶的同位素组成和铅、铀、钍、钚、锶的含量。观测到的~(238)U/~(204)Pb(μ)比值在导线东端拉斑玄武岩中为2.4，从导线西端中碱性玄武岩中为11.6。其同位素组成向西的放射成因稍弱。大部分样品的~(87)Sr/~(86)Sr值在大洋玄武岩中观察到的范围内，但花岗岩捕虏体和流纹岩的放射性稍强一些。
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.