地质年代学

SHRIMP zircon U-Pb ages of gabbro, anorthosite, and plagiogranite from the ophiolitic complex, and related marginal granite in the Jinshajiang area, provides important geochronological constraints for the oceanic spreding, the subduction and final collision, therefore, which constructs a time framework for the Jinshajiang Paleo-Tethys evolution.

应用SHRIMP方法测定了金沙江蛇绿岩中的各类辉长岩，斜长岩，斜长花岗岩，及沿金沙江带分布的陆缘型花岗岩的年龄，提供了洋壳形成，俯冲消减和碰撞造山事件等古特提斯演化的重要的同位素地质年代学制约，从而建立了金沙江古提斯演化的年代格架。

Geologists may specialize in the following fields: coal geology, environmental geology, geochronology, geomorphology or surficial geology, geotechnics, hydrogeology, marine geology, mineral deposits or mining, mineralogy, paleontology, petroleum geology, petrology, sedimentology, stratigraphy or biostratigraphy, structural geology or tectonics, volcanology or in other fields.

地质学家可能会专注于以下领域：煤炭地质，环境地质，地质年代学，地貌或地表地质，岩土工程，水文，海洋地质，矿藏或采矿，矿物学，古生物学，石油地质学，岩石学，沉积学，地层学或生物地层，结构地质或构造，火山或其他领域。

Paleomagnetism and Geochronology Laboratory, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

中国科学院地质与地球物理研究所古地磁与地质年代学实验室，北京〓100029

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。

This site is the homepage of Department of Earth Sciences, Dalhousie University of Canada. The department's research subjects include crustal dynamics and geochemistry, geochronology and thermochronology, land and marine surface systems and landscape evolution, petroleum and economic geology, etc.

该网站是加拿大Dalhousie大学地球科学系的主页，它介绍了有关该系的教学和科研情况，该系的研究包括地壳动力学和地球化学、地质年代学和地热年代学、陆海表面系统和地貌演化、以及石油和经济地质等。

The low temperature thermochronology method which applied in mountain exhumation and geomorphic formation and the dating of young geological body such as ground water will be the important developmental trend of geochronology

应用于山脉隆升和地貌形成的低温热年代学方法及地下水等年轻地质体系的测年，将是地质年代学发展的重要方向。

Cosmogenic nuclide surface exposure dating is a newly developed isotopic dating technique in the past few years.

宇宙成因核素地表暴露测年方法，是近年来迅速发展起来的一种新的同位素地质年代学方法。

A good many mico-landblock of the early Neoproterozoic-Cambrian volcanic rock that distribute in the Tianshan orogenic belt and on its both sides, and the Carboniferous-Permian volcanic rocks that widely distribute in the Tianshan and adjacent regions are selected for subject investigating in this paper. Renewing the ocean-land format and ocean-land conversion process of Tianshan orogenic belt in the Paleozoic is the masterstroke for this paper. On the basis of detailed field investigation, many subjects, such asregional lithology、geochemistry、structural geology、volcanic sedimentology geology、sotope geochronology and synthesis analysis study of geophysics data, are adopted as instrumentality in the paper, this study lays emphasis on the formation, evolution and dynamics of early Neoproterozoic-Cambrian and Carboniferous-Permian volcanic rock in the Tianshan and its adjacent regions to find out Carboniferous-Permian volcanic rock property, eruptive sequence, time and space distribution characteristics, to resume and reconstruct evolution process of Carboniferous-Permian volcanic rock, and to explore connection of magmatism process and lithosphere stretching action of neopaleozoic ocean-land transformation in the Tianshan region.

本文选择分布于天山及其两侧的诸多微陆块上新元古代—早寒武世火山岩和天山地区广泛发育的石炭纪—早二叠世火山岩为研究对象，以恢复重建天山造山带古生代洋陆格局和洋陆转换过程为主线，在详细的野外工作基础上，综合运用区域岩石学、地球化学、构造地质学、火山沉积学、同位素地质年代学、区域地球物理资料综合分析研究等多学科手段，重点研究天山及其邻区新元代—早寒武世和石炭—二迭纪火山岩系的形成演化及其动力学，查明天山石炭纪火山岩系的性质、喷发序列、时空分布特点，恢复重建其形成演化过程，探索天山地区晚古生代洋陆转换过程中火山岩浆作用与岩石圈拉伸作用的关系。

Geothermochronology based on mineral closure temperatures and geochronological methods such as U-Pb, Sm-Nd, Rb-Sr, Lu-Hf, Re-Os, 40Ar/39Ar, FT,/He, TIMS U-series, cosmogenetic nuclide (including 14C, etc.) and 3H/3He for young groundwater dating is reviewed in this paper.

简要介绍了基于矿物封闭温度的地质热年代学，并对多种地质年代学方法，包括U-Pb法、Sm-Nd法、Rb-Sr法、Lu-Hf法、Re-Os法、40Ar/39Ar法、裂变径迹测年、/He法、TIMS铀系法、宇宙成因核素定年（包括14C法等）和年轻地下水测年（如3H/3He法等）进行了综合评述。

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