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age data
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  年龄数据
    These age data are concordant with ~(40)Ar/~(39)Ar ages, 135.8~139.8 Ma, of the ore-forming intermediate-acid intrusive rocks.
    这组年龄数据和与成矿有关中酸性侵入岩的40Ar/39Ar同位素年龄135.8~139.8Ma相吻合。
短句来源
    Lastly, a historic and genetic model of the Qiyugou Au-bearing breccia pipes and link with the porphyry Leimengou Mo deposit are proposed on the basis of the age data of granitoid, breccia pipe and mineralization events in the area.
    最后,根据同位素年龄数据、本区构造和花岗质岩石演化特征、斑岩型Mo矿和角砾岩型金矿床等特征,建立了本区136Ma—105Ma期间的斑岩型Mo矿—角砾岩型金矿的岩浆热液系统的演化模式。
短句来源
    A lot of isotopic age data of many significant ore deposits in China have been obtained, but a certain geologic event in the mineralization process can not be marked by them.
    尽管我国好多矿床已经测得了大量同位素年龄资料,但这决不等于这些年龄数据均能标定成矿过程中某一地质事件发生的时代。
短句来源
    This age group sets up the time-order relationship of structure-magma-mineralization in this region. This work provides valid age data for the comparative study of gold deposits in eastern China.
    这一组年龄数据理顺了该地区构造—岩浆—成矿的时序关系,对中国东部金矿成矿对比研究提供了有效的年龄数据
短句来源
    At the same time,it is emphasized that getting a suite of reasonable age data one should pay attention to the study of geological background and define the relationship between the dating minerals and mineralization in order to select suitable dating methods.
    强调一套合理的矿床同位素年龄数据的获得,必须加强对地质背景的研究; 明确测年矿物与矿化的成因联系,选择合适的定年方法。
短句来源
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  “age data”译为未确定词的双语例句
    40Ar/ 39Ar dating was performed on hydrothermal sericite collected from mylonitized and sericitized diorite around rock of the Daping gold deposit, which yielded a set of age data, i.e., plateau age of 33.76±0.65 Ma, inverse and normal isochronal ages of 33.55±0.74 Ma and 33.57±0.74 Ma, respectively.
    本文对大坪金矿绢英岩化近矿围岩中的热液绢云母进行了40Ar-39Ar定年,得到其坪年龄为33.76±0.65Ma,相应的反等时线和正等时线年龄分别为33.55±0.74Ma和33.57±0.74Ma,显示大坪属于喜马拉雅早期金矿。
短句来源
    Then according to the known isotope age data of uranium mineralizations inthe area, the relationship between the process of extensional tectonics and regional uranium metallogenesis,as well as the corresponding relations in space and time between extensional tectonicsand uranium deposits of different types are analyzed.
    在此基础上,应用华东南地区不同类型铀矿床已有的成矿年龄资料,研究了伸展构造活动与区域铀成矿作用之间的联系,不同类型伸展构造与不同类型铀矿床之间在空间分布和时间演化上的对应关系。
短句来源
    In order to solve the problem of formation age of major mineralizated period in the Paishanlou gold deposit,we have adopted fast neutron activatium method to test 40 Ar/ 39 Ar age of quartz in gold bearing quartz veinlet disseminated ore and obtained the age data is 2 105.2±10.4 Ma.
    为解决主矿体的形成时代 ,选取含金石英细脉浸染状矿石中的石英测定了 4 0 Ar/39Ar年龄为 2 1 0 5.2± 1 0 .4Ma。
短句来源
    In the deposit,the skarnization fracture zone type (No.19 ore vein) is most important. Based on studies of the metallogenic environment of the deposit together with the K-Ar,zircon U-Pb and Rb-Sr age data of the metallogenic area and the Shizhuyuan mining area,it is held that the ore-forming process must have taken place in early Yanshanian period,and that there existed at least two ore-forming stages,with the formation of the No.
    通过矿床成矿环境和矿区及外围岩 (矿 )石K Ar、锆石U Pb、Rb Sr等时线等和石英流体包裹体Rb Sr等时线年龄资料的讨论 ,认为该矿床的成矿作用发生的燕山早期 ,年龄资料显示至少有 2个成矿阶段 ;
短句来源
    All of the age data of Cu-Ni deposits in the Eastern Tianshan,Altay,and Qinbulake show an ore-forming age from 320 Ma to 280 Ma,indicating that the end of the Hercynian is the peak of Cu-Ni deposits formation from mantle-source mafic-ultramafic magmatism.
    这表明,葫芦与东天山其他铜镍矿床乃至喀拉通克和箐布拉克铜镍硫化物矿床一样,主要形成于海西期,同位素年代学界定的成岩成矿时间大致在320~280 Ma,表明海西晚期在新疆北部为一个与基性-超基性岩有关的铜镍矿床成矿高峰期.
短句来源
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  age data
Combining these age data with the occurrences of the main granite body, the patched body, the major ore veins and Na-Ta mineralization, the paper discusses their formation orders and relationships.
      
The paper presents mineralogical, crystallochemical, and Rb-Sr age data on globular layer silicates of the glauconitic series from lower horizons of the Upper Riphean Kil'din Group, Srednii Peninsula.
      
Timing and duration of kimberlitic magmatism in the Zimnii Bereg diamondiferous province: Evidence from Rb-Sr age data on kimber
      
New SHRIMP U-Pb age data on zircons from plagiogranites in the ophiolites of the Kamchatsky Mys Peninsula, Eastern Kamchatka
      
New age data on Precambrian volcanic rocks of the khakdon group, eastern Kolyma region
      
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The Bayan Obo Fe-Nb-REE deposit,Inner Mongolia,China is the largest REE deposit in the world.Many research works on this deposit have been made and vast amount of scientific data have been accumulated.However,the genesis, especially the ore-forming age and REE sources, have been under dispute for a long time.21 samples were collected to determine the Sm-Nd isotopic compositions,of which 13 whole-ore samples from the Main ore body and the East ore body,3 whole-rock samples from the carbonatitic vein that cuts...

The Bayan Obo Fe-Nb-REE deposit,Inner Mongolia,China is the largest REE deposit in the world.Many research works on this deposit have been made and vast amount of scientific data have been accumulated.However,the genesis, especially the ore-forming age and REE sources, have been under dispute for a long time.21 samples were collected to determine the Sm-Nd isotopic compositions,of which 13 whole-ore samples from the Main ore body and the East ore body,3 whole-rock samples from the carbonatitic vein that cuts the quartzcoe strata in the north part of the mine region and 5 mineral samples from the late vein in the ore bodies. Three Sm-Nd isochrons were obtained on the basis of the isotopic analytical results. The whole-ore samples of the ores present a Sm-Nd isochron age of 1 286±91(2σ) Ma.With I_Nd=0.51098±4(2σ),ε_Nd(t)=-0.06±0.78,model age t_DM=1671±61(σ)Ma. The carbonatitic vein samples give an isochron age of 1223±65(2σ)Ma,with I_Nd=0.51093±35(2σ),ε_Nd(t)=-2.63±0.68,and it is in good agreement with a reported  ̄(40) Ar/ ̄(39) Ar age of 1260Ma for riebeckite in the fenite vein that cuts quartzose strata,The Sm-Nd isotopic analytical results for the 5 mineral samples yield an isochron age of 422±18(2σ)Ma,with I_Nd=0.511263±13(2σ),corresponding to ε_Nd(t)=-16.3±0.2. The values of ε_Nd(t)indicate that the REE or ore-forming materials in the deposit have most prob-ably been derived from the mantle and the age data suggest that the ore-forming process chiefly took place in the Middly Proterozoic, the age of 422Ma indicates alteration or metamorphism of the ore in the Calednian time.

白云鄂博铁铌稀土矿床的形成年龄是一个争论的问题。采自该矿床主、东矿的13个稀土矿石样品和5个明显为后期形成的脉体矿物样品被进行Sm-Nd同位素分析。对矿区北部侵入地层中的碳酸岩脉也做了工作。由矿石样品得出的Sm-Nd等时年龄为1286±91(2σ)Ma,I_Nd=0.51089±4(2σ),ε_Nd(t)=-0.06±0.78。脉体矿物样品给出的等时年龄为422±18(2σ)Ma,I_Nd=0.511263±13(2σ),ε_Nd(t)=-16.3±0.2。采自矿区北部碳酸岩的等时年龄为1223±65(2σ)Ma,I_Nd=0.510926±35(2σ)Ma,ε_Nd(t)=-2.63±0.68。其值与岩脉蚀变岩霓长岩中钠闪石 ̄(40)Ar/ ̄(30)Ar年龄十分一致。基于以上年龄和同位素数据及其它已获得的地质、地球化学资料,我们认为白云鄂博矿床稀土矿化时间应是中元古代,而不是早古生代。在422Ma左右期间该矿床受到明显改造。矿床稀土物质来自于地幔。

The 14C and 230Th data of the sedimentS from the cores CK826 of the Dabusun region and from the cores CK2o22 of the Bieletan region have been accumulated in the study of chronology since 1976.From 1989, we made a systematic determination of 14C and 230Th on the samples of cores 88-01 and 89-04, and obtained more detailed data in the Study of evolution of Qarhan Playa.Cores 88-01 and 89-04 is located in the north shore of Dabusun Lake. The depths of both cores are 47m and 45m, respectively. The sediments are...

The 14C and 230Th data of the sedimentS from the cores CK826 of the Dabusun region and from the cores CK2o22 of the Bieletan region have been accumulated in the study of chronology since 1976.From 1989, we made a systematic determination of 14C and 230Th on the samples of cores 88-01 and 89-04, and obtained more detailed data in the Study of evolution of Qarhan Playa.Cores 88-01 and 89-04 is located in the north shore of Dabusun Lake. The depths of both cores are 47m and 45m, respectively. The sediments are similiar not only in depositional characteristics,but also in salt-forming ages. A ages vs. depth chart is given in this paper, and a linear equation is obtained from the chart.It can be seen from the chart that there is a good correlation between the ages and the depths.From the linear equation, rough salt-forming ages of the four salt layers in the Dabusun region are obtained. The ages of the bottom layer S1, S2, S3, S4are 50000, 36000, 30000, 18000a. B. P.,respectively. In addition, the surface salt crust of Qarhan Playa was formed in about 8000 ̄ 9000a.B. P.. In order to make the explanation more clear, the core section chart and age data of cores 88-01 and 88-04 are made together with those of the four cores described in the reference (3). The result indicates that the salt-forming age in the Dabusun region is about 50000 a. B. P., which is largely different.from those of cores CK2o22,CK6and CK1308, and they reveal the salt-forming age of the Bieletan region. The salt-forming age of the Dabusun region is about 2000 years older than that of the Bieletan region.

88-01孔和89-04孔是1989年后笔者用14C和230Th两种方法较为系统的测定了年龄的钻孔剖面。本文以此两孔为主,结合已有年龄数据的钻孔,重点讨论了达布逊区段的成盐年代,并根据88-01孔校正后的年龄,将达布逊区段四个大盐层的底板年龄大致划分为:S1约50000a.B.P.左右;S2约为36000a.B.P.左右;S3约30000a.B.P.左右;S4约18000a.B.P.左右。根据别勒滩区段CK2022,CK6和CK1308三个钻孔剖面,讨论了此区约25000a.B.P.成盐年代。

The determination of the timedimension of a mineralization process has been an important and complicated problem. A lot of isotopic age data of many significant ore deposits in China have been obtained, but a certain geologic event in the mineralization process can not be marked by them. Through example analyses, the authors indicate that the geochronological study of ore deposits must be carried out on the substantial basis of field study work of the geological setting. As to age-dating methods,the...

The determination of the timedimension of a mineralization process has been an important and complicated problem. A lot of isotopic age data of many significant ore deposits in China have been obtained, but a certain geologic event in the mineralization process can not be marked by them. Through example analyses, the authors indicate that the geochronological study of ore deposits must be carried out on the substantial basis of field study work of the geological setting. As to age-dating methods,the authors recommend that poly-isotopic-system methods be adopted,but more attentiom be paid to single mineral, Ar-Ar and Re-Os methods and even further to mineral microarea and Ar-Ar methods. In addition,if isochron age methods are employed, their reasonableness must be examined cautiously.

成矿过程时间维的确定是一项重要而复杂的研究任务。尽管我国好多矿床已经测得了大量同位素年龄资料,但这决不等于这些年龄数据均能标定成矿过程中某一地质事件发生的时代。作者通过实例分析指出,矿床同位素地质年代学的研究必须建立在扎实的野外地质背景研究基础之上;在测年方法上,应采用多元同位素体系,但要更多地关注单矿物、乃至矿物微区的、Ar-Ar和Re-Os测年方法;在使用等时线法时,必须首先对其合理性进行科学判别。

 
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