U-PB AGES FOR SPHENE FROM EARLY PRECAMBRIAN IGNEOUS ROCKS IN NORTHEASTERN MINNESOTA-NORTHWESTERN ONTARIO

被引:17
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作者
CATANZARO, EJ
HANSON, GN
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D O I
10.1139/e71-119
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P [天文学、地球科学];
学科分类号
07 ;
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页码:1319 / +
页数:1
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