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- 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。
- K Ar and Ar Ar dating is one of the best dating method to Mesozoic Cenozoic volcanic rocks. Appropriate size and preprocessing procedure are important for the method to get good data. K Ar和Ar Ar法是中、新生代火山岩最有效的测年方法之一 ,合适的粒度和有效的预处理程序对于提高年龄资料的质量至关重要。
- This method can be used in dating old rock and mineral samples, with their results corresponding well with that of K Ar dilute method and 40 Ar 39 Ar method, and more importantly, used in very young samples. 这种测量方法可以用于较老岩石、矿物样品的年龄测定 ,其结果与K Ar稀释法以及4 0 Ar - 39Ar法相一致 ;
- 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。
- Isotopic ages of the cumulate xenoliths and their host dioritehave been systematically measured by means of whole rock Rb Sr isochron, K Ar and 40Ar 39Ar techniques and 8 ages are obtained. 分别用Rb Sr法、K Ar法和Ar Ar法 ,对堆晶岩捕虏体及其寄主岩全岩或单矿物进行了详细的同位素地质年代学研究 ,共获得各种年龄数据8件。
- INTERPRETATION OF K Ar AGES OF TAIHANG TECTONOMAGMATIC BELT 太行山构造岩浆带K－Ar法同位素年龄分析
- ~(40)Ar-~(39)Ar Geochronology of the Shuiquangou Alkaline Complex and Related Gold Deposits, Northwestern Hebei, China 冀西北水泉沟杂岩体及与其有关金矿床的~(40)Ar-~(39)Ar同位素年代学研究
- ~(40)Ar/~(39)Ar geochronology and geochemistry of Cretaceous basaltic rocks for the central and northwestern Jiangxi Province 江西中西部地区白垩纪玄武质岩石的~(40)Ar/~(39)Ar年代学和地球化学研究
- 40 Ar/ 39 Ar AND K Ar DATING OF THE VOLCANIC ROCKS FROM THE NORTHERN COAST OF KING GEORGE ISLAND, WEST ANTARCTICA 西南极乔治王岛北海岸火山岩的~（40）Ar/~（39）Ar和K-Ar年龄测定
- Isotopic geochronology and geochemistry II. 同位素地质年代学与地球化学2。
- Another basic quantity is the bulk modulus K. 另一个基本的量是体积模量K。
- Assist finance dept. to collect AR on time. 协助财务部门及时收回应收帐款。
- Coordinate with customers for AR collecting. 遵守公司的信贷制度，与客户协调货款回收。
- Gold jewelry bears a number and the letter K. 金制的珠宝与一个数字和字母k有关。
- It is a diamond one inlaid with 18 K gold. 这是一枚镶有18K金的钻石戒指。
- Gökşar 格克沙尔
- Today you are to pass by the region of Moab at Ar. 你今天要从摩押的境界亚珥经过
- We ar all in favor this plan of testing in English. 我们都赞成英文考试计划。
- It is a diamond finger ring inlaid with 18 K gold. 这是一枚镶有18K金的钻石戒指。
- Guys to me? They ar just my toys! 人家只是想听听别人的意见吗,这位小同志!
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
