Most cities in China have experienced dramatic changes during the systematic progress of modernization and commercialization. Rebuilding residential space into heritage preservation is popular in Chinese urban plannin...Most cities in China have experienced dramatic changes during the systematic progress of modernization and commercialization. Rebuilding residential space into heritage preservation is popular in Chinese urban planning. Yearning for modernity generates a policy of cultural protection which is transformed by the public spaces within which people carry out daily lives. However, heritage preservation in these cities is in a dilemma. On side, with the opening up, Chinese society toward modernization has been accompanied by large-scale urbanization, rapid commercialization and a booming consumerism. The Chinese capital has forced people to face the challenge of urban environment management and adaptation to a new city. The traditional streets in big cities are destroyed first and then rebuilt to turn the capital into an international metropolis. On the other side, heritage protection needs its historical roots as the authentic cultural features. To some extent, the process of urban landscaping stimulates people＇s nostalgia tie. Although it seems to be individual, it is also a link of one＇s historical memory of sentiment with the development of social construction. Hence, collective urban nostalgia that emerged through the rebuilding of heritage in urban China can promote nationalism from the governmental perspective. Further, it can also lead people face the life itself but neglect the social tensions around them. Meanwhile, rebuilding mode of Longtang also elaborates the power structure existing among state, capital, intellectuals.展开更多
The Longtang Pb-Zn deposit occurs in the Upper Sinian Guanyinyan Formation. The host rocks include sandy shale, cherty limestone and dolomitic limestone.The deposit is a typical one of thallogen origin.The mineral ass...The Longtang Pb-Zn deposit occurs in the Upper Sinian Guanyinyan Formation. The host rocks include sandy shale, cherty limestone and dolomitic limestone.The deposit is a typical one of thallogen origin.The mineral assemblage in the ore is made up of sphalerite, galena, pyrite, enargite,tennantite, seligmannite, asphalt, etc. The ore-forming process is possessed of multiepisode and multi-stage characters. Generally sphalerites exhibit algal stromatolitic, bacterial and algal colloidal textures, providing evidence for the direct involvement of algaeand bacteria in mineralization of ore-forming elements during sedimentary diagenesis.This is the first transmingration of ore-forming elements. However, pyrite embracing bacteria and galena replacing/filling trichomes are typical organic textures, which are relatedto organic carbon and bitumen that can adsorb or reduce ore-forming elements. This is anindirect process of organic mineralization, i.e., the second transmigration of ore-formingelements. δ34S values are all greater than 5%o, indicating the dominance of the heavysulfur isotopes. The ore-forming temperature deduced from fluid inclusions ranges from100℃ to 150℃±. All this goes to show that the Longtang Pb-Zn deposit is of thallogenorlgin.展开更多
文摘Most cities in China have experienced dramatic changes during the systematic progress of modernization and commercialization. Rebuilding residential space into heritage preservation is popular in Chinese urban planning. Yearning for modernity generates a policy of cultural protection which is transformed by the public spaces within which people carry out daily lives. However, heritage preservation in these cities is in a dilemma. On side, with the opening up, Chinese society toward modernization has been accompanied by large-scale urbanization, rapid commercialization and a booming consumerism. The Chinese capital has forced people to face the challenge of urban environment management and adaptation to a new city. The traditional streets in big cities are destroyed first and then rebuilt to turn the capital into an international metropolis. On the other side, heritage protection needs its historical roots as the authentic cultural features. To some extent, the process of urban landscaping stimulates people＇s nostalgia tie. Although it seems to be individual, it is also a link of one＇s historical memory of sentiment with the development of social construction. Hence, collective urban nostalgia that emerged through the rebuilding of heritage in urban China can promote nationalism from the governmental perspective. Further, it can also lead people face the life itself but neglect the social tensions around them. Meanwhile, rebuilding mode of Longtang also elaborates the power structure existing among state, capital, intellectuals.
文摘The Longtang Pb-Zn deposit occurs in the Upper Sinian Guanyinyan Formation. The host rocks include sandy shale, cherty limestone and dolomitic limestone.The deposit is a typical one of thallogen origin.The mineral assemblage in the ore is made up of sphalerite, galena, pyrite, enargite,tennantite, seligmannite, asphalt, etc. The ore-forming process is possessed of multiepisode and multi-stage characters. Generally sphalerites exhibit algal stromatolitic, bacterial and algal colloidal textures, providing evidence for the direct involvement of algaeand bacteria in mineralization of ore-forming elements during sedimentary diagenesis.This is the first transmingration of ore-forming elements. However, pyrite embracing bacteria and galena replacing/filling trichomes are typical organic textures, which are relatedto organic carbon and bitumen that can adsorb or reduce ore-forming elements. This is anindirect process of organic mineralization, i.e., the second transmigration of ore-formingelements. δ34S values are all greater than 5%o, indicating the dominance of the heavysulfur isotopes. The ore-forming temperature deduced from fluid inclusions ranges from100℃ to 150℃±. All this goes to show that the Longtang Pb-Zn deposit is of thallogenorlgin.
