The Nandan-Hechi metallogenetic belt is the most important tin-polymetallic producing district in China, and is the location of the Dachang super-large tin deposit. Based on the detailed field investigation and isotop...The Nandan-Hechi metallogenetic belt is the most important tin-polymetallic producing district in China, and is the location of the Dachang super-large tin deposit. Based on the detailed field investigation and isotopic data, the stages of magmatic activity in the Nandan-Hechi metallogenetic belt have been lined out in this paper. Through the study about the geochemical characteristics of different granites, and by using ω(Al2O3)-ω(SiO2), ω(TFeO)/[ω(TFeO)+ω(MgO)]-ω(SiO2), AFM, ACF and Rb-Yb+Ta, Rb-Y+Nb, Ta-Yb, Nb-Y discrimination diagrams in combination with regional geological setting analysis, the authors carried out analyses about the structural environment for the formation of the granites, and discussed the structural environment and dynamic setting for the large scale mineralization in this area. Our study indicates that the majority of the granites in Nandan-Hechi metallogenetic belt belong to the POG type, while the later stage alaskite belongs to the RRG+CEUG type. The granites were formed at the stage of structural transformation from postorogenic phase to intraplate setting. But the major structural environment is characterized by steady regional extension. The formation age for the granites coincides with the time for this transformation, and this translation environment is favored for large-scale metallogenesis.展开更多
The level of agricultural product sales is one of the important factors that directly affect the economic income of rural villagers.Due to the limitations of geographical conditions and the lagging economic and social...The level of agricultural product sales is one of the important factors that directly affect the economic income of rural villagers.Due to the limitations of geographical conditions and the lagging economic and social development,there are major problems in the sales of agricultural products in Shishan area.To better help the sales of agricultural products in Shishan area of northwest Guangxi,Nandan County of Hechi City is taken as research object.Current situation of agricultural products production and sales channels in Nandan County is understood,and problems existing in the sales of agricultural products in Nandan County are analyzed.Moreover,targeted opinions and suggestions are put forward from the aspect of innovating the sales channels of agricultural and sideline products,thereby helping quality improvement and development of agricultural industry.展开更多
文摘The Nandan-Hechi metallogenetic belt is the most important tin-polymetallic producing district in China, and is the location of the Dachang super-large tin deposit. Based on the detailed field investigation and isotopic data, the stages of magmatic activity in the Nandan-Hechi metallogenetic belt have been lined out in this paper. Through the study about the geochemical characteristics of different granites, and by using ω(Al2O3)-ω(SiO2), ω(TFeO)/[ω(TFeO)+ω(MgO)]-ω(SiO2), AFM, ACF and Rb-Yb+Ta, Rb-Y+Nb, Ta-Yb, Nb-Y discrimination diagrams in combination with regional geological setting analysis, the authors carried out analyses about the structural environment for the formation of the granites, and discussed the structural environment and dynamic setting for the large scale mineralization in this area. Our study indicates that the majority of the granites in Nandan-Hechi metallogenetic belt belong to the POG type, while the later stage alaskite belongs to the RRG+CEUG type. The granites were formed at the stage of structural transformation from postorogenic phase to intraplate setting. But the major structural environment is characterized by steady regional extension. The formation age for the granites coincides with the time for this transformation, and this translation environment is favored for large-scale metallogenesis.
基金Supported by Guangxi Environmental Sustainable Rural Development Demonstration Project(55261-0012022)Special Action Project of"Strengthening Agriculture and Enriching the People"and"Six Ones"of the Scientific and Technological Pioneer(GUINONGKEMENG202214)。
文摘The level of agricultural product sales is one of the important factors that directly affect the economic income of rural villagers.Due to the limitations of geographical conditions and the lagging economic and social development,there are major problems in the sales of agricultural products in Shishan area.To better help the sales of agricultural products in Shishan area of northwest Guangxi,Nandan County of Hechi City is taken as research object.Current situation of agricultural products production and sales channels in Nandan County is understood,and problems existing in the sales of agricultural products in Nandan County are analyzed.Moreover,targeted opinions and suggestions are put forward from the aspect of innovating the sales channels of agricultural and sideline products,thereby helping quality improvement and development of agricultural industry.
