辽西建昌侏罗纪燕辽生物群地层高精度CA-ID-TIMS U-Pb 年代学:对最古老带羽毛恐龙及真兽类哺乳动物的年代制约

来源 :2016中国地球科学联合学术年会 | 被引量 : 0次 | 上传用户:carlos_yu
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本文对辽西建昌玲珑塔地区大西山剖面凝灰岩层进行了高精度CA-ID-TIMS锆石U-Pb年龄测定,获得了高精度年龄数据,年龄测定结果与地层层序完全一致。ID-TIMS U-Pb年龄测定结果表明大西山剖面含重要化石地层的年龄在160.89 Ma至160.25 Ma之间,属于晚侏罗纪早期牛津阶。该研究成果为目前发现的最古老带羽毛恐龙和真兽类哺乳动物的生存年代提供了确凿的高精度同位素年代学证据。
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