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isotope age data
相关语句
  同位素测年资料
     A group of isotope age data of Cenozoic volcanic rocks were obtained.
     获取一批新生代火山岩的同位素测年资料
短句来源
  “isotope age data”译为未确定词的双语例句
     Through an intensive analysis of more than 30 isotope age data obtainedby using different methods combined with a study of the geological setting,it is considered that the single grain detrital zirconU-Pb age of 2450(2434±23)Ma represents the maximum lower-limit age of formation of the Hongqiyingzi Group,while the UPb ages of metamorphosed zircon and zircon in granite are all about 2000(1978-2026)Ma,which is the upper-limit age of this group.
     通过对使用不同方法和测定对象所获得的30余件同位素年龄数据,结合产出的区域地质背景深入的分析研究,认为单颗粒碎屑锆石U-Pb法2450(2434±23)Ma,代表红旗营子群生成的最大下限年龄; 而变质锆石及花岗岩中的锆石U-Pb年龄均在2000(1978—2026)Ma,是该群的上限年龄。
短句来源
     On thebasis of isotope age data and the age of the emplaced strata,this rock belt should be the Middle-Late Carboniferous product.
     据同位素年龄资料及侵位地层时代,该岩带应为中、晚石炭世的产物。
短句来源
     A wealth of new U-Pb isotope age data indicate that the ages of the lower boundary of the wedged-shaped strata (including the Banxi Group and /or its equivalents Gaojian, Furongxi, Danzhou, Xiajiang, Dengshan, Likou and Heshangzhen groups) are all less than or close to 820Ma in age, which represents the onset of the earliest deposition of the Neoproterozoic rift system.
     大量新的U-Pb同位素年龄资料表明,“楔状地层”下部(包括板溪群或与之相当的高涧群、芙蓉溪群、丹洲群、下江群、登山群、厉口群等)的底界年龄均小于或接近820Ma。
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
     According to the study of Estheria contained in an interbed of ordinary sedimentary rocks of the Late Jurassic vol- canic rocks in the north- central Da Hinggan Mountains and new isotope age data,the authors consider that the “Eosestheria- bearing acid and acid- alkaline pyroclastic rocks and lavas” assigned to the Baiyingaolao Formation on the western slope of the northern Da Hinggan Mountains should be assigned to the Longjiang Formation and its horizon may correlate with the Yixian Formation in western Liaoning.
     根据大兴安岭中北部地区晚侏罗世火山岩正常沉积夹层中所含叶肢介化石的研究成果和同位素年龄新资料,认为大兴安岭北部西坡被归入白音高老组中的“含Eosestheria的酸性、酸碱性火山碎屑岩和熔岩”不是白音高老组,应归入龙江组,层位与辽西义县组对比。
短句来源
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  相似匹配句对
     ASSEMBLAGE OF DATA OF ISOTOPE GEOLOGIC AGE, XINJIANG
     新疆同位素地质年龄数据汇编
短句来源
     THE EFFECT OF BACKGROUND POLLUTION ON AGE DATA IN ISOTOPE CHRONOLOGY
     同位素年代学中本底污染对年龄数据的影响
短句来源
     Their K-Ar isotope age is 146.6 Ma.
     钾-氩法同位素年龄为145.6Ma。
短句来源
     Its Rb-Sr isotope age is 606. 3 Ma.
     基底的岩性为结晶片岩、大理岩及变质杂砂岩夹层,同位素Rb-Sr年龄为606.3Ma;
短句来源
     Moreover, the age of N.
     此外就N.
短句来源
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The steeply dipping(65° - 80°)Xupu-Sanjiang fault zone lies in the border region of Hunan-Guizhou-Guangxi provinces. It may be traced about 700 km, with a strike from NNE to NE, and assuming an 's'shape. There are various wrench structures within the fault zone, such as echelon folds, splay fractures, regional stretching, cleavage belt and steep beds. These wrench structures have proved that the fault zone has undergone left-lateral horizontal displacement. On the other hand, the formation of the wrench structures...

The steeply dipping(65° - 80°)Xupu-Sanjiang fault zone lies in the border region of Hunan-Guizhou-Guangxi provinces. It may be traced about 700 km, with a strike from NNE to NE, and assuming an 's'shape. There are various wrench structures within the fault zone, such as echelon folds, splay fractures, regional stretching, cleavage belt and steep beds. These wrench structures have proved that the fault zone has undergone left-lateral horizontal displacement. On the other hand, the formation of the wrench structures was controlled by shear stress and the distribution displayed the general tectonic pattern of the wrench fault zone.The strata cut by the fault zone include the Proterozoic Lengjiaxi Group up to the Carboniferous, thus revealing the vertical deformation zoning and also its horizontal variations. Three vertical deformation facies and zones have been distinguished in the fault zone. In the top level deformation fades, brittle shear is the main destructive mechanism. It was dominated by fault breccia and fault gouge etc., and there was no ductile structures. Some marginal faults which controlled the Messozoic red-basins and the faults within the red basins are considesed as typical structures. The second shallow level facies was domineted by brittle and brittle-ductile transitional deformation, to which belonged the upper Sinian and the Paleozoic. At its upper leve cataclastic rocks were the principal tectonites. However, it can be seen that such rocks series coexisted with the mylonite series in the lower part of this facies. Ductile deformation was very typical in the third mid-deep level deformation facies, which often occurred in the lower Sinian and much older formations. Mylonites were the main tectonites. In addition, ductile flow structures, syntectonic foliation and lineation were also well developed. These three deformation facies weve resulted from different strain mechanism and have showed that the factors (e. g. temperature and hydrostatic pressure etc. ) controlling tectonism varied with the depth of the crust and the size of stress difference. Therefore they resulted in the different wrench effects in the regional tectonics. Different deformation patterns and different horizontal displacements of the paleolithofacies belts deformed by the wrench fault zone occurred at various depths. In general, the lithofacies belts were distorted by ductile shearing and there was no brittle offset. In contrast to it, the lithofacies belts of the shallow facies suffered both brittle offset and ductile distortion or complete brittle offset. The horizontal displacement increased progressively from the lower to the upper level of the fault zone.The formation and evolution of the Xupu-Sanjiang fault zone constiuted a considerably complex process. Based on the fact that fault zone deformed he pre-Mesozoic lithofacies belts and controlled the Mesozoic basins and according to some isotope age data of magmatic bodies which appeared along the fault zone, the author has come to the conclusion that the whole Xupu-Sanjiang fault zone formed in the Mesozoic, in which might include some pre-existing faults. The fault zone suffered a great left-lateral horizontal displacement immediately after its birth. The greatest displacement, being more than 300 km, took place during the early Yanshan movement in the Middle Jurassic, and deformed all the pre-existing structures in the western part of South China. The primitive E-W trending structural system was reoriented and rotated to NNE-NE. In the early Cretaceous there was tensional faulting along the fault zone, at one side of which the tensional basins often formed. Some secondary faults and folds occured within these basins. After the Late Cretaceous the fault zone has been characterized by a minor right-lateral displacement.

溆浦-三江断裂带是位于华南湘黔桂边境的平移断裂带。本文通过对断裂带基本平移构造的研究以及断裂带两侧地层岩相带的对比,认为该断裂带形成于中生代并以大规模左行平移为特征,最大平移量为300km。它强烈地改造了本区原来的构造面貌。在断裂带平移改造过程中,不同深度层次的地层岩相带的变形与变位方式有显著差别,地壳较深处以韧性变形为主,较浅部层次则主要为脆性-韧性过渡变形以至脆性变形。从地壳深部到浅处,断裂平移量是递增的。

This paper reported the K-Ar ages and U, Th, Pb, Rb, Sr contents and Pb, Sr isotopic compositions of some Cenozoic basaltic volcanic rocks from Anhui and Jiangsu provinces. According to the data of 16 samples analysed, the volcanic eruption can be divided into three stages in age:The oldest stage is Paleogene of 65—35Ma, distributed in Anhui, the middle one is PIiocene of 8—16Ma, mainly in Jiangsu, and the youngest one is Pleistocene of 0.6Ma, Nushan,Anhui. Fashang basalt formation established with stratigraphy-paleontology...

This paper reported the K-Ar ages and U, Th, Pb, Rb, Sr contents and Pb, Sr isotopic compositions of some Cenozoic basaltic volcanic rocks from Anhui and Jiangsu provinces. According to the data of 16 samples analysed, the volcanic eruption can be divided into three stages in age:The oldest stage is Paleogene of 65—35Ma, distributed in Anhui, the middle one is PIiocene of 8—16Ma, mainly in Jiangsu, and the youngest one is Pleistocene of 0.6Ma, Nushan,Anhui. Fashang basalt formation established with stratigraphy-paleontology should be Miocene in age of about 10Ma in terms of isotope age data.

根据皖苏地区16个新生代玄武质火山岩的K-Ar年龄结果,认为该区新生代火山活动可以分为老第三纪(65—35Ma,主要在安徽),中新世(16—8Ma,主要在江苏)和更新世(0.6Ma,安徽女山)三期。玄武岩的铅锶同位素组成表明它们反映了其地幔岩浆源区的特征,及源区的不均一性,它们可能分别来源于比较原始的地幔和比较亏损的地幔,并有一定的混合和近期的富集作用。

Lying in the Beishan rift zone in the northeastern part of the Tarim plate,the Pubei basic-ul-trabasic belt,striking ENE,is controlled by the Baidiwa deep fault inside the rift zone. This deepfault is flanked by a mantle dome on the northwest and by a south- dipping mantle slope in thesoutheast,and the rock belt is just located between the mantle dome and the mantle slope. On thebasis of isotope age data and the age of the emplaced strata,this rock belt should be the Middle-Late Carboniferous product....

Lying in the Beishan rift zone in the northeastern part of the Tarim plate,the Pubei basic-ul-trabasic belt,striking ENE,is controlled by the Baidiwa deep fault inside the rift zone. This deepfault is flanked by a mantle dome on the northwest and by a south- dipping mantle slope in thesoutheast,and the rock belt is just located between the mantle dome and the mantle slope. On thebasis of isotope age data and the age of the emplaced strata,this rock belt should be the Middle-Late Carboniferous product. It is composed of gabbro ,olivine gabbro ,olivine clinopyroxenite andwehrlite resulting from at least 4-5 intrusions. Basic rocks are characterized by high Al and Ca,low alkalis and relatively high Mg/Fe ratio;while ultrabasic rocks are characterized by low-Al andCa,alkali-poor ultramafic rocks,derived from a slightly or relatively high degree of partial melt-ing of mantle materials. Study of metallogenic specialization indicates that this rock belt has agood prospect for the formation of Cu-Ni sulfide deposits.

新疆坡北基性、超基性岩带位于塔里木板块东北部北山裂谷带内,受裂谷内部白地洼深断裂控制,走向北东东。该断裂西北侧为地幔隆起区,东南侧为一向南倾斜的地幔斜坡,岩带正好位于幔隆与幔坡之间。据同位素年龄资料及侵位地层时代,该岩带应为中、晚石炭世的产物。岩带至少有4~5个侵入期次的辉长岩、橄榄辉长岩、橄榄单辉岩及单辉橄榄岩构成。基性岩以富铝钙、低碱、镁铁比值较高为特征,超基性岩以低铝钙、贫碱的超镁铁质岩为特征,是地幔物质分熔程度稍高或较高情况下的产物。该岩带具有铜镍硫化物矿床的良好成矿前景。

 
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