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- isotopic dating technique 同位素测年
- 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。
- A best chronology of the Cretaceous to Paleocene tectonic regimes has been established with the age constrained by stratigraphy and isotopic dating data. 这两个拆离系统分别形成于早白垩世莱阳群和晚白垩世-古新世王氏群沉积阶段。
- Zhou T X, Chen J F, Li X M, Foland K A. 40Ar/39Ar isotopic dating of intrusions from Huoshan-Shucheng syenite zone, Anhui Provience[J].Geology of Anhui, 1992, 2: 4-11. [9]周泰禧; 陈江峰; 李学明; Foland K A.;安徽霍舒正长岩带侵入体的40Ar/39Ar法同位素地质年龄[J]
- Since the sample collection does no harm to the bronze body, the TL dating technique can be more widely applied in the dating and authenticity tests. 由于本方法在陶范取样过程中一般不会对青铜器本体造成伤害,使得这一热释光测年及真伪鉴别法具有更广阔的应用前景。
- The isotopic age of the volcanic rocks of the Mount Bowles Formation (MBF) outcropped on the eastern part of Livingston Island, South Shetland Islands, Antarctica have been remeasured by 40 Ar/ 39 Ar and laser microarea isochron age dating techniques. 采用40Ar/39Ar法和激光微区等时线方法,对南极南设得兰群岛利文斯顿岛东部产出的鲍勒斯山组火山岩重新进行了年龄测定。
- This paper has in detail analyzed and discussed stable oxygen isotope,glacial accumulation,the dating technique of ice core and environmental indices recorded in ice core. 南极地区和北极地区是冰芯研究最早的地区,在气候变化研究中起领先的作用。
- Abstract: This paper mainly introduces the basic theory, age calculation and application of chemical dating technique using Electron-Probe Micro-Analyses (EPMA) and so on. 摘 要: 主要对电子探针化学测年技术的基本原理及其相关技术作一介绍。
- Based on the isotopic dating data of volcanics and recent research achievements of age boundary between Jurassic and Cretaceous systems, it is suggested that the volcanic series in Shengyuan basin must be attributed to Lower Cretaceous. 本文根据盛源盆地火山岩同位素年龄数据和侏罗-白垩系界线年龄的最新研究成果,认为盛源盆地火山岩系的地层时代应属早白垩世。
- Substantial changes consist in the transfer of Wutaian into Archaean and the alteration of lower limit of Changchengian system from 1850 to 1700 Ma, both based on new interpretation of isotopic dating. 划分中的重要改变是根据新的年龄值数据将五台群归入太古代,将长城系底界改为1700Ma;
- Abstract: Based on the isotopic dating data of volcanics and recent research achievements of age boundary between Jurassic and Cretaceous systems, it is suggested that the volcanic series in Shengyuan basin must be attributed to Lower Cretaceous. 文摘:本文根据盛源盆地火山岩同位素年龄数据和侏罗-白垩系界线年龄的最新研究成果,认为盛源盆地火山岩系的地层时代应属早白垩世。
- The latest active age is determined by OSL, TL and ESR dating techniques. 通过释光(TL、OSL)和电子自旋测年(ESR)研究了这些断裂的最新活动时代。
- Isotopic dating of strike-slip mylonites, ultramylonite as well as associated igneous rocks in uplift belt indicated that the strike-slip displacement of the fault zone took place in early Cretaceous. 断裂带内走滑糜棱岩、超糜棱岩及伴生岩浆岩的同位素测年 ,表明其走滑时间为早白垩世。
- The analytical results of monazite dating are well consistent with the previous ~(40)Ar-~(39)Ar ages, indicating that the electron microprobe dating technique for monazite and the new formula estimating age uncertainties are acceptable. 分析结果与前人用4 0 Ar- 39Ar法得到的结果相吻合 ,表明独居石电子探针定年技术是一种可靠有效的测年方法。
- isotopic dating of marine sediment 海洋沉积物同位素年代测定
- Dating techniques Methods used to determine the age of rocks, fossils, or archaeological remains. 测年技术:一种确定岩石、化石以及考古学遗迹年龄的方法。
- authigenic mineral isotopic dating 自生矿物同位素测年
- CALIBRATION FOR TL DATING TECHNIQUE 热释光定年代技术中的刻度问题
- isotopic dating of autogenetic illite 自生伊利石同位素测年