This paper briefly reviews the Triassic marine reptile fossils in Guizhou Province, especially the fossils that have been recently found in the Guanling area. Based on three sections at Guanling and Xingyi, Guizhou Pr...This paper briefly reviews the Triassic marine reptile fossils in Guizhou Province, especially the fossils that have been recently found in the Guanling area. Based on three sections at Guanling and Xingyi, Guizhou Province and Luoping, Yunnan Province, four horizons with vertebrate fossils are recognized in the Middle and Upper Triassic of this area; They are from bottom to top: Member I and Member II of the Guanling Formation, and the Zhuganpo Member and the Wayao Member of the Falang Formation.展开更多
Coal samples from high arsenic coal areas have been analyzed by electron micropbe analyzer (EMPA), scanning electron microscopy with an energy dispersive X-ray analyzer (SEM-EDX), X-ray diffinction analysis (XRD), low...Coal samples from high arsenic coal areas have been analyzed by electron micropbe analyzer (EMPA), scanning electron microscopy with an energy dispersive X-ray analyzer (SEM-EDX), X-ray diffinction analysis (XRD), low temperature ashing (LTA), transmission electron microscopy (TEM), X-ray absorption fine structure (XAFS), instnunent neutron activation analysis (INAA) and wet chemical analysis. Although some As-bearing minerals such as pyrite, arsenopyrite, realgar (?), As-bearing sulfate, and As-bearing clays are found in the high arsenic coals, their contents do not account for the abundance of arsenic in the some coals. Analysis of the coal indicates that arsenic exists mainly in the form of As 5+ and As 3+, combined with compounds in the organic matrix. The occurrence of such exceptionally high arsenic contents in coal and the fact that the arsenic is dominantly organically associated are unique observations. The modes of occurrence of arsenic in high As-coals are discussed.展开更多
THE environmental geochemistry problems during the processes of mining activities are intensively considered by scientists worldwide, and the hydrogeochemistry presents an important implication of toxic metalcontamina...THE environmental geochemistry problems during the processes of mining activities are intensively considered by scientists worldwide, and the hydrogeochemistry presents an important implication of toxic metalcontamination related to mining activities. The hydrogeochemistry due to mining activities and naturalmineralized processes present some differences whose comparison can indicate a good understanding of theinfluence of mining on the environment. This ongoing study aims at the hydrogeochemistry of toxic metals in the Au-As-Hg-Tl metallogenicbelt of Huijiabao anticline in southwest Guizhou, China. The presently-mined Lanmuchang mercury-thallium deposit with a Hg-mining history of about 350 years containing one of the world’s highest concentration of thallium and the to-be-mined Yanshang gold deposit enriching high concentration of toxic metals have been chosen to study the hydrogeochemistry of toxic metals. The groundwater samples werecollected from the shallow aquifer in terms of spring, domestic well and karstic cave whereas the surfacewater was only sampled downside the surface drainage leaching the mine waste at Lanmuchang. All展开更多
The application of flue-cured tobacco well-cellar transplanting technique un- der film and covering bowl in southwest prefecture of Guizhou province was intro- duced. And the two flue-cured tobacco well-cellar transpl...The application of flue-cured tobacco well-cellar transplanting technique un- der film and covering bowl in southwest prefecture of Guizhou province was intro- duced. And the two flue-cured tobacco well-cellar transplanting techniques were compared. Results showed that compared with flue-cured tobacco well-collar trans- planting technique under film, the technique covering bowl had the advantages of protecting ecological environment, reducing labor force and cost, resisting the bad weather and so on. This research provided theoretical foundation for the early appli- cation flue-cured tobacco well-cellar transplanting technique covering bowl in different展开更多
[Objective] The aim was to study the prediction of summer rainstorm induced by southwest vortex.[Method] Based on 2.5°×2.5° re-analysis data in four time points a day from June to August during 1971-200...[Objective] The aim was to study the prediction of summer rainstorm induced by southwest vortex.[Method] Based on 2.5°×2.5° re-analysis data in four time points a day from June to August during 1971-2008 at 700 hPa in northern hemisphere provided by NECP,rainstorm and southwest vortex from June to August in Guizhou Province were studied systematically,and the forecast data of rainstorm induced by southest vortex was obtained.[Result] Southwest vortex was one of major systems influencing rainstorm in flood season(from June to August),especially in June and July;the occurrence of this kind of rainstorm was closely related to the moving path of southwest vortex,activity of cold air,environmental flow field at 500 hPa,shear line at 850 hPa,southwest jet,position of subtropical high ridge,water vapour conditions,vorticity field,etc.On the basis of factual data,objective forecast system was established and verified by means of similar method and physical diagnosis.The results showed that it was rational to choose upper trough,southwest vortex,conditions of vertical movement,southwest jet,water vapour conditions,etc.as forecast factors;when the center of southwest vortex was located in major key area(100°-105° E,25°-35° N),and secondary key area(105°-108° E,25°-35° N),regional rainstorm occurred most easily,especially in major key area with high frequency of rainstorm.[Conclusion] The study could provide references for the improvement of prediction level of rainstorm induced by southwest vortex,disaster prevention and reduction.展开更多
基金This work was supported by the National Natural Science Foundation of China(40072010,49942006)Innovation Funds of the Chinese Academy of Sciences(KZCX3-J-02).
文摘This paper briefly reviews the Triassic marine reptile fossils in Guizhou Province, especially the fossils that have been recently found in the Guanling area. Based on three sections at Guanling and Xingyi, Guizhou Province and Luoping, Yunnan Province, four horizons with vertebrate fossils are recognized in the Middle and Upper Triassic of this area; They are from bottom to top: Member I and Member II of the Guanling Formation, and the Zhuganpo Member and the Wayao Member of the Falang Formation.
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 49273189, 49873007) Key Project of the Chinese Academy of Sciences, the Education Foundation of Sir Wang Kuan-Cheng (Hong Kong), and the Venture Capitol Foundation (U.S.Ge
文摘Coal samples from high arsenic coal areas have been analyzed by electron micropbe analyzer (EMPA), scanning electron microscopy with an energy dispersive X-ray analyzer (SEM-EDX), X-ray diffinction analysis (XRD), low temperature ashing (LTA), transmission electron microscopy (TEM), X-ray absorption fine structure (XAFS), instnunent neutron activation analysis (INAA) and wet chemical analysis. Although some As-bearing minerals such as pyrite, arsenopyrite, realgar (?), As-bearing sulfate, and As-bearing clays are found in the high arsenic coals, their contents do not account for the abundance of arsenic in the some coals. Analysis of the coal indicates that arsenic exists mainly in the form of As 5+ and As 3+, combined with compounds in the organic matrix. The occurrence of such exceptionally high arsenic contents in coal and the fact that the arsenic is dominantly organically associated are unique observations. The modes of occurrence of arsenic in high As-coals are discussed.
文摘THE environmental geochemistry problems during the processes of mining activities are intensively considered by scientists worldwide, and the hydrogeochemistry presents an important implication of toxic metalcontamination related to mining activities. The hydrogeochemistry due to mining activities and naturalmineralized processes present some differences whose comparison can indicate a good understanding of theinfluence of mining on the environment. This ongoing study aims at the hydrogeochemistry of toxic metals in the Au-As-Hg-Tl metallogenicbelt of Huijiabao anticline in southwest Guizhou, China. The presently-mined Lanmuchang mercury-thallium deposit with a Hg-mining history of about 350 years containing one of the world’s highest concentration of thallium and the to-be-mined Yanshang gold deposit enriching high concentration of toxic metals have been chosen to study the hydrogeochemistry of toxic metals. The groundwater samples werecollected from the shallow aquifer in terms of spring, domestic well and karstic cave whereas the surfacewater was only sampled downside the surface drainage leaching the mine waste at Lanmuchang. All
文摘The application of flue-cured tobacco well-cellar transplanting technique un- der film and covering bowl in southwest prefecture of Guizhou province was intro- duced. And the two flue-cured tobacco well-cellar transplanting techniques were compared. Results showed that compared with flue-cured tobacco well-collar trans- planting technique under film, the technique covering bowl had the advantages of protecting ecological environment, reducing labor force and cost, resisting the bad weather and so on. This research provided theoretical foundation for the early appli- cation flue-cured tobacco well-cellar transplanting technique covering bowl in different
文摘[Objective] The aim was to study the prediction of summer rainstorm induced by southwest vortex.[Method] Based on 2.5°×2.5° re-analysis data in four time points a day from June to August during 1971-2008 at 700 hPa in northern hemisphere provided by NECP,rainstorm and southwest vortex from June to August in Guizhou Province were studied systematically,and the forecast data of rainstorm induced by southest vortex was obtained.[Result] Southwest vortex was one of major systems influencing rainstorm in flood season(from June to August),especially in June and July;the occurrence of this kind of rainstorm was closely related to the moving path of southwest vortex,activity of cold air,environmental flow field at 500 hPa,shear line at 850 hPa,southwest jet,position of subtropical high ridge,water vapour conditions,vorticity field,etc.On the basis of factual data,objective forecast system was established and verified by means of similar method and physical diagnosis.The results showed that it was rational to choose upper trough,southwest vortex,conditions of vertical movement,southwest jet,water vapour conditions,etc.as forecast factors;when the center of southwest vortex was located in major key area(100°-105° E,25°-35° N),and secondary key area(105°-108° E,25°-35° N),regional rainstorm occurred most easily,especially in major key area with high frequency of rainstorm.[Conclusion] The study could provide references for the improvement of prediction level of rainstorm induced by southwest vortex,disaster prevention and reduction.
