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- 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。
- Minerals or altered minerals such as sericite, biotite and K feldspar in the altered wallrocks are selected to be objects of age determination, and the Ar Ar, K Ar, Rb Sr, U Pb isochron dating methods are adopted. 选用矿石或蚀变围岩中的绢云母、黑云母、钾长石等蚀变矿物作为测年对象 ,采用 Ar- Ar、 K- Ar法或 Rb- Sr等时线法测年在目前的技术条件下是经济可行的 ,关键是要保证被测矿物确为蚀变矿物并且纯度较高。 用 U- Pb法测定矿脉中的水热锆石来确定成矿年龄 ,但如何区分继承锆石和水热锆石尚不成熟。
- Sm-Nd isotopic age dating on tungsten oxides from precious and nonferrous metal deposits and its geological significance 贵重和有色金属矿床钨氧化钐-钕同位素定年研究及其地质意义
- Re-Os isotopic age dating of molybdenite separates from Elegen porphyry Mo (Cu)mineralized area, northwestern Alxa, western Inner Mongolia 内蒙古额勒根斑岩型钼(铜)矿化区辉钼矿铼-锇同位素年龄及地质意义
- U- Pb isotopic age U-Pb同位素年龄
- According to the methods of apparent-pole moving Curve ancl isotopic age dating of roek, the intrusive mass was formed cluring Caledonian period instead of Yanshanian 根据视极移曲线及同位素测定岩石年龄的方法,确定岩体的形成时代为加里东期岩浆活动,以此对燕山期岩浆活动的结论提出质疑。
- It intruded in Upper Ordovician Shifeng Formation and is dated as 333 86Ma of U Pb concordant age of zircon, which belongs to middle stage of Variscan. 岩体侵入上奥陶统石缝组(O3s) , 岩体的锆石U?Pb 一致线年龄333-86 Ma, 属华力西中期。
- The Pb- Pb isotopic ages and geologic significance of gneissic granite in Hezi, Jiangxi 江西南部鹤仔片麻状花岗岩类Pb-Pb同位素年龄及地质意义
- isotopic age datingn. 同位素年龄测定
- U-Pb isotopic age dating 锆石U-Pb年龄
- TAYLOR R N. Pu, U and Pb isotope measurement using TIMS and MC-ICP-MS, May 2007, Presentation in CIAE. 黄达峰;罗修泉;李喜斌;等.;同位素质谱技术与应用[M]
- Sr and Pb isotopic compositions are identical to or similar to some ocean island basalts and mantle plume constituent. Nd、Sr、Pb同位素组成与洋岛玄武岩和一些地幔柱组分相同或相近。
- Pb isotopic data indicate that ore-forming material came from upper mantle or lower crust and went into Archaeozoic crystalline basement 1900Ma ago. 铅同位素表明成矿物质来自上地幔或下地壳,大约在1900Ma从源区分离出来进入太古宙结晶基底。
- This article mainly studies the origin of ore-forming matter, by analyzing ores, strata and granites Pb isotopic composition. 本文通过对彩霞山铅锌矿床的矿石铅、岩浆岩石铅和围岩岩石铅的同位素组成分析,来探讨成矿物质的来源。
- The data of this paper demon-strate that ore sulfides of the Gangdise porphyry copper belt have the same S and Pb isotopic compositions as ore-bearing porphyries. 本文资料显示,该带的含矿斑岩和矿石硫化物具有完全一致的S、Pb同位素组成。
- The whole-rock Pb isotopic composit ions of the North Dabie Complex(NDC),the South Dabie Complex(SDC)and the Cretaceous granites in the ea st Dabie Mountains are reported. 研究了大别山东部北大别变质杂岩、南大别变质杂岩和白垩纪花岗岩的全岩Pb同位素组成。
- The Pb isotopic features of the Jinshajiang ophiolitic melange display higher 208Pb/204Pb and 207Pb/204Pb ratios,implying a DUPAL anomaly,i. e. mantle signatures of Paleo-tethys. Pb同位素研究表明,金沙江蛇绿混杂岩具有相对较高的~(208)Pb/~(204)Pb和~(207)Pb/~(204)Pb,显示了具有DUPAL异常型的特征,类似于古特提斯的地幔特征。
- K Ar dilution and 40 Ar/ 39 Ar step heating methods have been chosen in dating the isotopic ages of the volcanic and intrusive rocks of Byers Peninsula, Livingston Island. 以K-Ar稀释法和40Ar/39Ar阶段加热法对利文斯顿岛百尔斯半岛的熔岩和次火山岩测定了同位素年龄。
- ZIRCON U Pb AGE OF META BASIC LAVA FROM THE KUANPING ROCK GROUP,SHAANXI PROVICE 陕西宽坪岩群变基性熔岩锆石U-Pb年龄
- Dynamic model for Pb isotope evolution in the continental crust of China. 中国大陆地壳铅同位素演化的动力学模型。