1)  geologic age determination
地质年代测定
2)  Geological age determination
地质年代测定
3)  geochronometry
地质年代测定学<地>
4)  rubidium-strontium method of age determination
铷-锶法(地质)年代测定
5)  geology
地质
1.
The Environment Evaluation of Agriculture geology in Zhejiang Province;
浙江农业地质生态环境评价
2.
The function and quality management in the geology controlling during petroleum exploration supervision.;
石油勘探监理中地质监督的作用与质量管理
3.
Study of the affect of mine geology condition change and mining minerals activity to gas gush;
矿井地质条件变化与采矿活动对瓦斯涌出的影响
6)  geological
地质
1.
By analyzing the report of the geological wurvey of Qingdao Economic and Technological Development Zone,the different measures are taken to deal with different foundation beds on the basis of the different geological conditions.
通过对青岛开发区地质勘测报告分析 ,针对不同地质条件采取了不同地基处理措施 ,如 :水泥粉喷桩、振冲碎石桩、深层搅拌桩、人工挖孔桩、预制桩、灌注桩、强夯等等处理方法。
2.
The Jixi coal field is situated at the mountainous area,the geological condition is complex,although this region are many including the coal bed,although may pick the level some,but the best level are not many,moreover also has the big fault.
鸡西煤田地处山区,地质条件复杂,该区域虽然含煤层较多,尽管可采层有些,但最佳层不多,而且还有大断层。
参考词条
补充资料:地质年代测定
分子式:
CAS号:

性质:根据40K每年的衰变量和40K/40Ar比值,推算地质年代的方法。用真空熔融法把矿样中Ar分离出来,往Ar中加入一定量已知浓度36Ar或38Ar稀释剂C,经同位素平衡,用质谱分析Ar同位素组分,按W=C{(40Ar/38Ar)M-(40Ar/38Ar)T-295.5[(36Ar/38Ar)M-(36Ar/38Ar)T]}公式,计算样品中由40K衰变成40Ar的量W。再用其他方法测定40K的量。根据矿样中40Ar和40K含量推算矿石的地质年代。式中M为稀释剂中氩同位素的比值;T为稀释剂与样品混合后氩同位素比值;295.5为大气中40Ar与36Ar的比值。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。