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- The stable variation of lead isotope compositions suggests that it belongs to normal lead. 铅同位素组成变化不大,属正常铅。
- And the study on application of lead isotope tracing for city environment pollution sources can get a good result. 铅同位素示踪理论应用于城市环境污染源的研究,能够取得比较理想的结果。
- Through K-Ar isotope age study in pillow basalt,has gained the isochrone age is 139Ma.The age is the formation age of pillow basalt. 在枕状玄武岩中获得K-Ar（全岩）同位素年龄为139Ma（测试单位：宜昌地质矿产所同位素室），因此确定其时代为晚侏罗世晚期。
- The lead isotope study shows that ores of the Mujiazhuang copper deposit and the host rocks contain very high radiogenic lead. 研究表明，穆家庄铜矿矿石铅和近矿围岩岩石铅具有极高的放射性成因铅特点。
- The ammonites from the lower shale and isotope age from its upper volcanic rock(define) the age of Sangxiu Formation from Berriasian to Hauterivian of Lower Cretaceous. 桑秀组下部的页岩段与江孜甲不拉组的最下部地层相当,上部火山岩的同位素年龄为133 M a。
- In recent years lead isotope tracing has been playing its unique role in studying the source and migration of heavy metals in soil. 近年来铅同位素示踪在研究土壤中相关重金属来源及其运移途径起到独特的作用。
- A Archaeozoic granulite with an isotope age(Sm-Nd isochoron) of 3450 Ma,was found firstly in Proterozoic Dakendaban Group in eastern north margin of Qaidam Basin. 在柴达木盆地北缘东段,首次从古元古代达肯大坂岩群中发现太古宙麻粒岩,并取得3450Ma Sm-Nd等时线同位素年龄。
- By the known data of isotope age determination, Nanhuaian time-structure frame was principally set up with the top boundary about 700 Ma and bottom about 800 Ma. 综合已有同位素测年数据，初步建立起南华纪年代构造格架，确立南华纪底界年龄为800 Ma左右，顶界年龄为700 Ma左右。
- The studies on constant element, trace element, PEE and lead isotope indicate that the subalkalic intrusive complex body is formed by deep crust-mantle migmatization. 综合岩石和矿床的常量元素、微量元素、稀土元素及铅同位素等特徵，表明偏碱性侵入杂岩体是深部壳幔混合作用形成的；
- HUANG Dian-hao.Re-Os isotope age of main Cu-Mo metallogenetic belt in China and associated mineralizing evolution[J].Mineral Deposits,1998,17(Sup.):813-816. [9]黄典豪.;我国主要铜(钼)成矿带的铼-锇年龄及成矿时空演化[J]
- How to define the age of the west Dayanchi ultrabasic rocks, East Tianshan, Xinjiang, has long been questionable because of lack of reliable isotope age data. 大盐池西超基性岩一直缺乏可靠的年龄资料,因此时代厘定一直存在疑问。
- The sulfur and lead isotope compositions indicate that the ore_forming materials were mainly derived from the volcanic rocks and granodioritic porphyries. 硫_铅同位素指示成矿物质主要源于火山岩地层和花岗闪长斑岩脉。
- CHANG Xiang-yang,ZHU Bing-quan.Application of lead isotope method in estimates of seeking mine by chemic reconnoitring[J].Mineral Rock Geo-chemis-try Aviso,1997,16(4) :245 - 249. [2]常向阳;朱丙泉.;铅同位素方法应用于化探找矿评价[J]
- Through U-Pb isotope age study in sheeted dike complex, has gained the isochrone age is 114-133Ma.The age is early cretaceous,which indicates the time of formation of sheeted dike complex. 另外，在该蛇绿岩套中的岩墙群进行了单颗粒锆石U-Pb同位素测年，获得的表面年龄值为114-133Ma之间，时代为早白垩世，基本反映了席状岩墙群的成岩年龄。
- Most lead isotope data from barite ores, galena-beari ng black shales and black shales (host rock) are plotted on or around the extend ed line of upper crust, indicating an isogenetic origin. 对取自天柱大河边重晶石矿床的重晶石样品和含方铅矿黑色页岩样品进行了铅同位素测定与研究。
- Large quantities of analyses and statistics of gold abundance in different strata and locks combined with lead isotope data suggest that greenstone of Late Archean Xigudui Formation is the source bed of gold deposits. 通过铅、硫、氢、氧同位素以及不同层位、岩石金丰度的大量统计,成矿与构造、岩浆岩关系研究,表明金的成矿作用具有多来源、多成因、多阶段的特点,金矿有明显的层控性,晚太古代西?囟炎槁萄沂墙鸬目笤床恪 区域东西向复式背斜和南北向韧性剪切带分别控制了成矿区和矿田、矿床、矿体的分布。
- The carbon isotopic age by 14C of Krish cultural layer of this settlement is about 6650+50 y. BP or 5600-1480 y. 这些地区Krish文化层的~(14)C同位素年代为6650+/-50年,或者公元前5600-1480年。
- This zone consists of basalt, diabase and other basic intrusive rock, and the isotopic age is between 259 Ma and 292 Ma. 它们的同位素年代为（259±09）Ma-（292。0±0.;5）Ma。
- AN ION EMITTER FOR LEAD ISOTOPE ANALYSIS 一种用于铅同位素分析的离子发射剂
- The times of every pluton intrusion have been preliminarily defined on the basis of the isotopic age data of the Mesozoic granitoids. 2、根据中生代花岗岩的同位素年龄资料，初步厘定了各岩体的侵入时代。
