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- chronometric dating method 精密测年法
- The second dating method was palaeo-magnetic analysis, or magnetic polarity stratigraphy. 第二种测定法是古磁学分析法，也叫磁极地层学测定法。
- K Ar and Ar Ar dating is one of the best dating method to Mesozoic Cenozoic volcanic rocks. Appropriate size and preprocessing procedure are important for the method to get good data. K Ar和Ar Ar法是中、新生代火山岩最有效的测年方法之一 ,合适的粒度和有效的预处理程序对于提高年龄资料的质量至关重要。
- The 14C age dating method was applied to study the deposited age of the Jiangbei conglomerate in Youxi profile,Jiangjin. The geochemical characteristics of oxides such as MgO,CaO,Fe2O3,FeO,Fe2O3/FeO were analyzed. 本研究采用14C法对江津油溪剖面江北砾岩胶结年代进行测定;用滴定法和原子吸收光谱仪对填隙物的Fe2O3、FeO、CaO、MgO及Fe2O3/FeO变化特征进行了分析.
- The longer transportation distance of the fluvial deposits facilitates the bleaching and increases the reliability of the luminescence dating method, especially for the young material. 当然是愈是年轻的标本，较长的搬运距离愈是可以增加被晒退的机会，当然也会增加萤光定年法的可信度。
- In practice,reaction extrusion is a new trend in the extrusion technology.The multiscrew extruder based on co rotating twin screw extruder is an up to date method. 在实验上，反应挤出技术代表了双螺杆挤出机开发的趋势，在此基础上的多螺杆技术是该领域的新发展。
- The geologic dating methods, which include the paleontology method, archeomagnetism method, and isotopic method, present absolute ages or relative ages of geologic events. 前人已建立的地质定年方法(同位素法、古生物法和古地磁法)给出的是地质事件的“绝对年龄”或“相对年代”。
- U-Pb and Pb-Pb dating methods have been used to determine the age of H8 dolomite in Bayan Obo Ore Deposit. 采用U Pb和Pb Pb方法研究了内蒙古白云鄂博赋矿H8白云岩的年代。
- The results of all these dating methods and fossil geochronometry should be contrasted each other. 与蛇绿岩形成、演化相关的各地质事件发生的时间可以对蛇绿岩的形成时代进行约束。
- Using radiometric dating methods, Sugden determined that the ash settled into the fissure after a volcanic eruption 8.1 million years ago. 使用放射性断代法，苏格丹发现火山灰早在810万年前的一次火山喷发后，就已进入了裂缝。
- The method seems good but it needs to be tried out. 这个方法似乎不错，但需要试验一下。
- fluorine-uranium-nitrogen-test dating method 氟负氮测年法
- thermoluminescence dating method 热光测年法
- The high precision dating methods,such as,Re-Os dating of sulphide and ~(40)Ar-~(39)Ar dating of sericites are proposed to date this type of gold deposits. 提出了利用硫化物Re-Os法;热液绢云母40Ar-39Ar法等直接精确测定热液矿物年龄以获得成矿年龄的方法和可能途径.
- Besides, many of the Date methods have been deprecated in favor of Calendar methods, so you probably want a Calendar object anyway. 此外,为了支持Calendar方法,很多Date方法都已经取消了,所以无论如何,您都很可能需要Calendar对象。
- They've been dating for a long time. 他们一直频频约会。
- Minerals or altered minerals such as sericite, biotite and K feldspar in the altered wallrocks are selected to be objects of age determination, and the Ar Ar, K Ar, Rb Sr, U Pb isochron dating methods are adopted. 选用矿石或蚀变围岩中的绢云母、黑云母、钾长石等蚀变矿物作为测年对象 ,采用 Ar- Ar、 K- Ar法或 Rb- Sr等时线法测年在目前的技术条件下是经济可行的 ,关键是要保证被测矿物确为蚀变矿物并且纯度较高。 用 U- Pb法测定矿脉中的水热锆石来确定成矿年龄 ,但如何区分继承锆石和水热锆石尚不成熟。
- I can't claim infallibility for this method. 我不敢说这方法绝对有效。
- Summer fallow is the best method of destroying weeds. 夏季休耕是消灭杂草的最好办法。
- They haven't set a date for their wedding yet. 他们的婚期还没定下来。
