Tourmaline is widespread in the host strata of strata-bound base metal sulphide de-posits in the Devonian metallogenic district around Shanyang-Zhashui in eastern Qinling. As amember of the schorl-dravite series, the ...Tourmaline is widespread in the host strata of strata-bound base metal sulphide de-posits in the Devonian metallogenic district around Shanyang-Zhashui in eastern Qinling. As amember of the schorl-dravite series, the tourmaline is characterized by Mg>Fe and Na > Ca,showing apparent chemical zonation which records the geochemistry during its formation andsubsequent regi0nal metamorphism and hydrothermal overprint. The close similarity in chemi-cal and isotopic constitutions between the tourmaline of the main metallogenic epoch in this district [FeO/(FeO+MgO) = 0. 34 - 0. 39 andδ 11B = - 7. 6‰. - - 8. 8‰] and those related tomassive sulphide deposits typical of submarine (exhalative) hydrothermal sedimentation mayadd further support to a similar mechanism of mineralization for the strata-bound deposits in thedistrict.展开更多
Altai polymetallic mineralization belt is famous copper-polymetallic mineralization belt in the world. There are a lot of gold deposits in the Altai ore belt in Xinjiang, China. These gold deposits belong to two genet...Altai polymetallic mineralization belt is famous copper-polymetallic mineralization belt in the world. There are a lot of gold deposits in the Altai ore belt in Xinjiang, China. These gold deposits belong to two genetic types: volcanogene late-stage hydrothermal type and fractured altered rock type. The authors discuss mainly the geological and mineralized features of fractured altered rock type of gold deposits in Altai gold ore belt. Base on this study, the metallogenic law is summarized and the deep metallogenic prognosis has been done in Duolanasayi and Tuokuzibayi gold deposits, and some mineralized anomalys have been discovered.展开更多
In order to optimize monitoring points and monitoring factor, the relationshipbetween pollutants and soil sample were established by correspondence analysis.Thestudy results show that the reflecting monitoring points ...In order to optimize monitoring points and monitoring factor, the relationshipbetween pollutants and soil sample were established by correspondence analysis.Thestudy results show that the reflecting monitoring points and monitoring factors in thegraphic on the same factor axis can clearly express the intrinsic link between pollutantsand monitoring points and distribution characteristics.To determine the main monitoringpoint and the main monitoring indicators can reduce and optimize the number of monitoringpoints under the premise of ensuring the typical and representative of monitoring data.Using the correlation of pollutants can reduce the number of monitoring indicators and improvethe effectiveness of data collection.展开更多
文摘Tourmaline is widespread in the host strata of strata-bound base metal sulphide de-posits in the Devonian metallogenic district around Shanyang-Zhashui in eastern Qinling. As amember of the schorl-dravite series, the tourmaline is characterized by Mg>Fe and Na > Ca,showing apparent chemical zonation which records the geochemistry during its formation andsubsequent regi0nal metamorphism and hydrothermal overprint. The close similarity in chemi-cal and isotopic constitutions between the tourmaline of the main metallogenic epoch in this district [FeO/(FeO+MgO) = 0. 34 - 0. 39 andδ 11B = - 7. 6‰. - - 8. 8‰] and those related tomassive sulphide deposits typical of submarine (exhalative) hydrothermal sedimentation mayadd further support to a similar mechanism of mineralization for the strata-bound deposits in thedistrict.
基金Supported by the National "305" Project(2001BA609A-07-08)Innovative Project of CAS(KZCX1-Y-03-01)
文摘Altai polymetallic mineralization belt is famous copper-polymetallic mineralization belt in the world. There are a lot of gold deposits in the Altai ore belt in Xinjiang, China. These gold deposits belong to two genetic types: volcanogene late-stage hydrothermal type and fractured altered rock type. The authors discuss mainly the geological and mineralized features of fractured altered rock type of gold deposits in Altai gold ore belt. Base on this study, the metallogenic law is summarized and the deep metallogenic prognosis has been done in Duolanasayi and Tuokuzibayi gold deposits, and some mineralized anomalys have been discovered.
基金Supported by the Public Welfare Research Program of State Environmental Protection Administration(200909065)
文摘In order to optimize monitoring points and monitoring factor, the relationshipbetween pollutants and soil sample were established by correspondence analysis.Thestudy results show that the reflecting monitoring points and monitoring factors in thegraphic on the same factor axis can clearly express the intrinsic link between pollutantsand monitoring points and distribution characteristics.To determine the main monitoringpoint and the main monitoring indicators can reduce and optimize the number of monitoringpoints under the premise of ensuring the typical and representative of monitoring data.Using the correlation of pollutants can reduce the number of monitoring indicators and improvethe effectiveness of data collection.
