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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。
- 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。
- 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。
- ORE LEAD ISOTOPES AS A TRACER FOR ORE-FORMING MATERIAL SOURCES: A REVIEW 矿石铅同位素示踪成矿物质来源综述
- 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；
- 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]
- LEAD ISOTOPES IN SOIL AS A TRACER OF ENVIRONMENTAL LEAD POLLUTION IN HANGZHOU 杭州市土壤铅污染的铅同位素示踪研究
- The horse forged ahead the lead in the homestretch. 那匹马在最后阶段突然加速跑到前面。
- Shirley will try out for the lead in the play. 雪莉将参加该剧主角的选拔演出。
- Excessive patriotism can lead to xenophobia. 爱国主义过了头即可导致仇视一切外国人。
- 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。
- Lead aprons shield people from radiation. 铅做的工作裙可使人免进辐射。
- 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。
- Graphite is used in making lead pencils. 石墨常被用来做成铅笔。
- Lead will fuse at quite a low temperature. 铅会在相当低的温度下熔化。
- According to the lead isotopic model ages and geologic characteristics of the ore deposits, two main types of Pb-Zn deposits can be classified in SW Yangtze block, i.e., the Mississippi valley type (MVT) and the sedimentary exhalative (SEDEX) type. 综合矿石铅同位素模式年龄和矿床产出的地质特征，初步厘定出扬子地块西南缘存在着两种不同成因类型的铅锌矿床，即MVT型和SEDEX型。
- The team recovered its lead in the second half. 该队在下半场重新领先。
- Their lead isotopic values are much higher than those of the Archean metamorphic rocks of the Sanggan group in this area, and located between the two lead growth curves of upper mantle and lower crust. 其三组铅同位素比值明显高于本区太古界桑干群变质岩，并位于上地幔和下地壳铅增长线之间。
