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2篇 您的检索式:作者名="J.J.Mahoney"
    题名 作者 年代 出处 被引量
1西藏罗布莎蛇绿岩中辉长辉绿岩Sm-Nd定年及Pb,Nd同位素特征显示文摘用Sm-Nd法测定了西藏罗布莎超基性岩体中辉长辉绿岩脉的年龄, 斜长石、辉石及两个全岩的内部等时线年龄值为(177±31) Ma, 初始εNd(t) = +8, 显示该岩墙形成于中侏罗世; Nd, Pb同位素特征表明该岩脉源于印度洋型地幔域. 推测中侏罗世该区蛇绿岩形成于大洋环境.周肃 莫宣学 J.J.Mahoney 张双全 郭铁鹰 赵志丹 2001科学通报2001,46,16:42
2Geochronology and Nd and Pb isotope characteristics of gabbro dikes in the Luobusha ophiolite, Tibet显示文摘We report a combined internal and whole-rock Sm-Nd isochron age, and Nd and Pb isotopic data for gabbro dikes of the Luobusha ophiolite in Tibet. The Sm-Nd isochron of data for two whole rocks and plagioclase and clinopyroxene separates from one of the rocks yields a Middle Jurassic age of (177±31) Ma (with an initial εNd(t) = +8), which provides a significant bound on the time of formation of the Luobusha ophiolite. The Nd and Pb isotopic charac-teristics of the dike indicate an Indian-Ocean-type isotopic affinity, and we conclude that the Luobusha ophiolite formed in an oceanic setting during the Middle Jurassic.ZHOU Su MO Xuanxue J.J.Mahoney ZHANG Shuangquan GUO Tieyjing ZHAO Zhidan 2002Chinese Science Bulletin2002,47,2:38
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