搜索结果: 1-8 共查到“同位素地球化学 Lu-Hf”相关记录8条 . 查询时间(0.062 秒)
对溧水盆地8件典型的中生代次火山岩-侵入岩进行了详细的锆石U-Pb年代学和Lu-Hf同位素研究. 结果显示，老虎头角闪闪长玢岩年龄为130.5±1.6 Ma，大铜山角闪闪长玢岩年龄为136.0±3.4 Ma，大魏庄角闪闪长玢岩年龄为132.7±2.7 Ma，野山凹粗安斑岩年龄为127.0±1.9 Ma，砚瓦桥石英闪长玢岩年龄为129.4±1.7 Ma，西北山辉石闪长玢岩年龄为133.2±2.1 M...
新疆拜城县波孜果尔A型花岗岩类岩体位于塔里木地台北缘及邻区的近东西向碱性侵入岩带上，主要岩石类型为霓石钠闪石英碱长正长岩、霓石钠闪碱长花岗岩、黑云母碱长正长岩。全岩SiO2=68.97%~74.14%，Na2O+K2O=9.67%~11.19%，Al2O3=13.72%~15.26%，Fe2O3=0.18%~1.41%，FeO=0.91%~1.51%，CaO=0.35%~0.63%。稀土元素总量较...
Growth rate of continental crust in the northeast margin of the North China Craton: Constraints from the U–Pb dating and Lu–Hf isotopes of detrital zircons from the Laoha River
North China Craton detrital zircon U–Pb age Hf isotope Laoha River
2017/4/11
Recently, how to quantitatively estimate the growth rate of continental crust is an enigmatic issue. With the development
of ICP-MS technology, the U–Pb dating and Lu–Hf isotopic compositions of detr...
早白垩世花岗闪长岩和石英二长岩是腾冲地块内重要的岩石类型,以含角闪石为特征,其高钠低钾和偏铝质性质展示其I型花岗岩的属性。锆石SHRIMP U-Pb定年结果表明花岗闪长岩和石英二长岩分别侵位于122±1.3Ma和125±1.3Ma,其锆石εHf(t)值分别为-9.6~-4.8(平均-6.7±0.7)和-7.8~-4.7(平均-6.3±0.6),对应的单阶段模式年龄为979~1190Ma和975~1...
由于成熟的热电离质谱（TIMS）测定技术，Rb-Sr和Sm-Nd同位素体系自20世纪60年代以来，在同位素地球化学与地质年代学中有着广泛的应用，而Lu-Hf同位素体系则随着近10余年来商业化的多接收电感耦合等离子体质谱（MC-ICP-MS）的出现，逐渐被广大的研究者所青睐。
New preconcentration technique of Zr, Nb, Mo, Hf, Ta and W employing coprecipitation with Ti compounds: Its application to Lu-Hf system and sequential Pb-Sr-Nd-Sm separation
coprecipitation Ti compounds Lu-Hf Pb-Sr-Nd isotope analysis preconcentration
2017/8/10
A new preconcentration technique of Zr, Nb, Mo, Hf, Ta and W has been invented employing coprecipiation with Ti compounds. Silicate samples were digested by HF with addition of Ti. Subsequent drying w...
本文报道基于Li2B4O7熔融样品、采用AG50W-X8和HDEHP组合或RE和HDEHP组合色谱交换柱,对同一岩石试样快速分离Sm-Nd-Lu-Hf的方法。用这两种方法对国际岩石标准BHVO-2、GSP-2和JB-1进行了Lu-Hf、Sm-Nd分离和^143 Nd/^144 Nd、^176Hf/^177Hf测定,并测定了BHVO-2、JB-1和JB-3的Lu/Hf和Sm/Nd比值,获得的结果在误...