SR-ND ISOTOPE SYSTEMATICS OF XENOLITHS IN CENOZOIC VOLCANIC-ROCKS FROM SW JAPAN

被引：17
|
作者：
KAGAMI, H
IIZUMI, S
IWATA, M
NUREKI, T
机构：
[1] SHIMANE UNIV,DEPT GEOL,MATSUE,SHIMANE 690,JAPAN
[2] OKAYAMA UNIV,COLL LIBERAL ARTS & SCI,DEPT GEOL SCI,OKAYAMA 700,JAPAN
来源：
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES | 1993年 / 69卷 / 01期
关键词：
SR-ND ISOTOPES; XENOLITH; LOWER CRUST; GRANITES;
D O I：
10.2183/pjab.69.1
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Based on new and previously published Sr and Nd isotope data, we examined the petrogenetic relationship between deep crust- and upper mantle-derived xenoliths contained in Cenozoic volcanic rocks and Cretaceous-Paleogene granitoid rocks in SW Japan. The deep crust- and upper mantle-derived mafic to ultramafic xenoliths contained in Cenozoic volcanic rocks from SW Japan have comparable initial Sr and Nd isotope ratios to the Cretaceous-Paleogene granitoid rocks in their respective districts. This may suggest that these xenoliths were genetically related to the Cretaceous-Paleogene granitoid rocks in SW Japan, and that regional variations in Sr and Nd isotope ratios observed in the granitoid rocks are attributed to differences in the geochemistry of the magma sources.
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页码：1 / 6
页数：6
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