英语释义

1. an imaginary line or a line on a chart connecting points at which an event occurs simultaneously or which represents the same time or time difference

片语

synchrone同时；等时线

nd isochronnd同位素

isochron datingIsochron dating is a common technique of radiometric dating and is applied to date certain events, such as crystallization, metamorphism, shock events, and differentiation of precursor melts, in the history of rock Isochron dating can be further separated into mineral isochron dating and whole rock isochron dating; both techniques are applied frequently to date terrestrial and also extraterrestrial rocks (meteorites).

isochron surface同期面

sr isochronsr同位素

mantle isochron地幔等时线

isochron layer同期层

secondary isochron二次等时线

isochron map等时图

英汉例句

• a line joining points of equal time or age, such as a reflection in a seismic profile or contours in an isochron map.

  相同时间或年代的点的连线，比如地震剖面中的反射和等时线图中的等值线等。

• at the same time, a sm-nd isochron age of 1180 ma is obtained. according to the regional stratigraphic correlation, isotopic age and micropaleoplants, we put the gaolan group in the mesoproterozoic.

  作者根据皋兰巖群巖石组合、同位素年龄、微古植物化石等方面的特征，结合区域地层对比，将皋兰巖群地层时代厘定为中元古代。

• 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。