年代学

In the latest few years of the 20th century,studies on K-Ar geochronology have been pushing on a new step as a sign of method perfected and precision enhanced.

在20世纪的最后几年，以激光显微探针40Ar/39Ar定年方法的完善和精度的提高为标志，把K-Ar年代学研究推向了一个新高度。

The developmental trend of international geochronology in recent one hundred years and Chinese geochronology from 1980s is discussed through the statistics of geochronological documents.

探讨了国际地质年代学百年来和中国20世纪80年代中期以来的发展趋势。

The Berkeley Geochronology Center is a non-profit scientific research institution dedicated to establishing the history of the Earth, its various inhabitants, and its interactions with the rest of our Solar System, throughout the 4.6 billion years of our planet's existence.

Berkeley地质年代学中心是一个非盈利性的科研机构，致力于建立46亿年前地球形成以来，地球的历史、地球上各种繁衍物种的历史，以及地球与太阳系其它天体相互作用的历史。

The studies on ore-forming geochronology and ore fluid are conducted deeply in this paper.

本文对甘肃北山地区肃北县南金山金矿床的成矿年代学和成矿流体进行了系统研究。40Ar-39Ar同位素测年结果表明，南金山金矿石中绢云母的40Ar/39Ar坪年龄为242.8±0.8Ma，相当于印支早期，略晚于南金山金矿床附近闪长岩中黑云母的40Ar/39Ar坪年龄(244.2±0.3Ma)，这表明印支早期闪长岩对南金山金矿床的形成起着重要的控制作用。

Recently developed solid-source thermal ionization mass spectrometers are highly precise and sensitive, and are playing a crucial role in isotopic geochronology and geochemistry.

新型固体热电离质谱计以其高精度和高灵敏度，将在同位素年代学和地球化学领域有广阔的应用前景。

The ophiolite geochronology is very important for the study of tectonic evolution of orogenic belt and the reconstruction of the ancient ocean-land and plate tectonic framework.

蛇绿岩年代学在研究造山带构造演化、古洋-陆及板块构造格局恢复中至关重要。

In China, only the 40Ar/39Ar Laboratory of Beijing University has realized automatic measurement, but its control system was completely transplanted from Berkeley Geochronology Center, California, US.

针对国内这一领域的空白，中国科学院地质与地球物理研究所联合天津大学精仪学院共同合作研究"中国科学院科研仪器创新研制项目——智能化惰性气体同位素测量系统"，率先提出智能化测量系统的研究方向，在Ar-Ar年代学实验室现有质谱设备的基础上进行研制。

The Geochronology results from the magmatic rocks in study area show that the features of the acid magmatism in Paleozoic are that the ages of the rocks became younger from the eastern to the western and from the northern to the southern.

3通过对岩浆岩年代学成果的总结分析，发现研究区古生代与板块俯冲及碰撞相关的酸性岩浆活动的时空规律是：自东向西由老到新，自北向南由老到新。

Origin of modern Homo sapiens ; Quaternary geochronology ; U-series dating ; speleothems ; Southern China

现代人类起源；第四纪年代学；铀系测年；新生碳酸盐岩；中国南方

To obtain deformation age of the XMF, this paper used 40Ar-39Ar geochronology to study a series of mylonites including biotite, hornblende, and muscovite from Xiaotian-Mozit an ductile shear zone based on detailed field survey.

为了获得晓天－磨子潭断裂的活动时间，本次工作在详细的野外研究基础上，采集了一系列含黑云母、角闪石、白云母糜棱岩样品进行40Ar-39Ar年代学测试。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了