Evidence from isotopic dating suggests that the greenstone belts vary considerably in age.
来自同位素年龄鉴定的证据指出，绿岩带在年龄上彼此变化相当大。
The isotopic dating and fossil geochronometry are the basic methods of ophiolite geochronometry.
同位素测年及化石年代学法是蛇绿岩年代学研究的基本方法。
Isotopic dating and regional stratigraphic correlation indicate that the Xigeda Formation is Pliocene-Early Pleistocene sediment.
结合同位素地质年龄，区域对比分析，确认昔格达组属上新世至早更新世沉积。
No isotopic dating had so far been made for the L ate Proterozoic Tantou Group and Yangjiaqiao Group of the Central-South Jiangxi area.
赣中南地区晚元古代之潭头群、杨家桥群，一直缺乏同位素年龄数据资料。
This study provides a high-precision Re-Os isotopic dating for ten molybdenite separated from the different ore types with an isochron age of (168.
文章首次对采自矿床不同类型矿石中的辉钼矿进行了铼-锇同位素定年，获得等时线年龄为（168。
Several methods have been used for the isotopic dating of the Qulong, Tingong and Chongjing porphyry copper deposits, which gives out a diagenetic age of 17.
本文通过多种方法对冈底斯成矿带中驱龙、厅宫、冲江等斑岩铜矿进行了同位素定年研究，确定出冈底斯斑岩铜矿成岩年龄为1 7。
According to the isotopic dating, it was emplaced into the active continental margin in Permian, which was resulted from the eastward subduction of the Tethys sea.
结合同位素测年结果及其它地质事件，确定是在二叠纪侵位于活动陆缘，是区内古特提斯洋向东俯冲消减作用的产物。
The complex was traditionally considered as the Archean basement of the Yangtze Block, but recent isotopic dating results indicate that it was not formed in Archean.
康定杂岩以往被认为是扬子地块太古宇的基底，但近年来的同位素年龄测定结果表明其并不是形成于太古宙。
"Double spike" isotopic dating method of lead isotope is one of the dating ways of lead isotope, its aim is to correct mass differentiation effect and enhance the precision of measure.
铅同位素“双稀释剂”同位素定年法是当前应用较广的一种铅同位素定年方法。双同位素稀释法的目的在于校正质量鉴别效应，提高测定精度。
In the field of isotopic geochemistry, direct dating of sedimentary sequences and early-stage diagenesis has long been proved to be one of the challenging problems.
在地球化学领域中，直接解决沉积层序和早期成岩时代的定年问题长期以来被证明是具有挑战性的问题之一。
In the field of isotopic geochemistry, direct dating of sedimentary sequences and early-stage diagenesis has long been proved to be one of the challenging problems.
在地球化学领域中，直接解决沉积层序和早期成岩时代的定年问题长期以来被证明是具有挑战性的问题之一。
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