检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
出 处:《Chinese Science Bulletin》1999年第S2期185-186,共2页
摘 要:SELENIUM is a highly dispersed element with a lower Clarke of 0.05×10<sup>-6</sup> and rarely forms its own independent deposits in the crust. In recent years by the discovery of a series of selenium-bearing deposits(such as Laerma selenium-gold deposit and Yutangba selenium deposit) and selenium-rich strata (westHubei, Laerma, Ziyang, Langao, northwest Hunan, etc.), the character and genesis of the seleniumbearing formation (SBF) have been noted by many researchers. 1 Some classical SBF in China In China the classical SBFs include: (i) The Lower Cambrian SBF in Laerma, west Qinling: Thebackground value of selenium is 5.47×10<sup>-6</sup>, and the selenium content of the sillcalite and slate (mainrock type) averages 8.70×10<sup>-6</sup> and 3.05×10<sup>-6</sup> respectively. (ii) The Lower Cambrian SBF inZiyang and Langao, east Qinling: Selenium is present in relatively high abundance in the SBF, averaging3.89×10<sup>-6</sup> in the slate, 2.86×10<sup>-6</sup> in the sillcalite. (iii) The Lower Cambrian SBF in northwest Hu-
关 键 词:SELENIUM selenium-bearing formation GEOLOGICAL setting.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.171