No. 6 East tin deposit in the Songshujiao orefield, Gejiu, is characterized by one-stage hydrothermal activity and monotonous country rocks. The authors selected this deposit and used the multivariate statistical anal...No. 6 East tin deposit in the Songshujiao orefield, Gejiu, is characterized by one-stage hydrothermal activity and monotonous country rocks. The authors selected this deposit and used the multivariate statistical analysis to study the types of association of main ore-forming elements at different temperatures and pressures and their distribution in the deposit. On that basis combined with the structural analysis of the deposit, the recto-geochemical features of No.6 East tin deposit have been revealed and the direction and channel of migration of the ore solutions in faults and the deposit have been deduced. This research can appropriately elucidate the control of faults on the migration of ore solutions and the sites where ore solutions are dispersed and accumulated, thus providing the theoretical basis for the prediction of hydrothermal deposits in question.展开更多
Shaking table is a technology that is still used in processing of tin ore using water as a medium.In the application at PT Timah Tbk,the shaking table is still used to process low grade tin ore into tin ore with a sta...Shaking table is a technology that is still used in processing of tin ore using water as a medium.In the application at PT Timah Tbk,the shaking table is still used to process low grade tin ore into tin ore with a standard smelting grade of PT Timah(72%-74%Sn).In processing tin ore using a shaking table,valuable minerals and impurity minerals are separated based on differences in specific gravity,size and shape of the mineral.To get the recovery of valuable minerals(recovery)and optimal grades,it is strongly influenced by the separation variables of tin ore minerals.These variables include riffle,slope of deck,washing water rate,stroke length,and deck movement speed.This study aims to vary the number of riffles,table slope and time in a laboratory scale to obtain optimal recovery and grade of tin ore.Tin ore samples were obtained from the washing residue of the Toboali Washing Plant tin ore.In the experiment,the numbers of riffles set were 16(R1),24(R2)and 34(R3).The table slopes were 2°(S1),3°(S2),and 4°(S3).Time variations were 15(T1),20(T2)and 25 min(T3).The relationship between the number of riffles and the grade can be determined through quadratic polynomial regression analysis with the functionŶ=-20.60+2.26X+(-0.04X2),while the relationship between the number of riffles and recovery is determined by the functionŶ=-173.33+17.376 X+(-0.315X2).Optimal levels are obtained at variations in the number of riffle 26 by 66.43%,with levels of 8.45%Sn.Optimal recovery is obtained on the variation of the number of riffle 28 with a recovery of 66.43%.展开更多
The Dachang tin polymetallic ore field in northern Guangxi, China, lies in a mid late Paleozoic rift that borders up the southern boundary of the Jiangnan Xuefeng Massif. As a giant ore deposit, it deposited in middle...The Dachang tin polymetallic ore field in northern Guangxi, China, lies in a mid late Paleozoic rift that borders up the southern boundary of the Jiangnan Xuefeng Massif. As a giant ore deposit, it deposited in middle of the Nandang Hechi metallogenic zone. The ore hosting strata are of the Devonion, which shows the evident characteristics of polymetallic elements, i.e., Sn, Zn, Pb, Sb, As, Cu, Ag, In, Ge, Cd, et al., and over 1 000 000 t tin reserves.展开更多
Bainiuchang silver-polymetallic ore deposit is located in the southeast Yunnan tin-polymetallic metallogenic belt.The probable reserves and inferred resources of the deposit are of 6 470 t Ag and 1.10 Mt Pb and 1.72 M...Bainiuchang silver-polymetallic ore deposit is located in the southeast Yunnan tin-polymetallic metallogenic belt.The probable reserves and inferred resources of the deposit are of 6 470 t Ag and 1.10 Mt Pb and 1.72 Mt Zn and 86 kt Sn.Orebodies of the deposit occur in clastic-carbonate rocks of Tianpeng Formation and Longha Formation of the middle Cambrian System above the Bainiuchang concealed granite of the late Yanshan period.The concealed granite has the characteristics of tin-bearing granites.Abundance of the mineralization elements Sn,Cu,Zn,Pb,Ag and Sb is high in the granitic rocks.Sulphur isotope data of the metal sulphides indicate that most sulphur is derived from the magmas.The ores are similar in rare earth element(REE)patterns to the granitic rocks.The granitic magma activity results in ore-bearing structures.Rocks of the Middle Cambrian System above the concealed intrusion suffer from skarnization,hornfelsing,marbleization,siliconizing and carbonatization.The mineralization elements Sn,Cu,Zn,Pb,Ag and Sb successively appear from the top of the granite to surrounding rocks.These evidences indicate that the granitic magmatism is the principal mineralization factor.The opinion that the south Bainiuchang ore field and the north Awei ore block are tin and copper potential exploration areas was put forward and was verified by drilling tests.展开更多
Recently,Guangdong Development and Reform Commission released Guangdong 2019 Key Construction Projects Plan,which consists of 1170provincial-level key projects and 628 provinciallevel key preparatory projects of which...Recently,Guangdong Development and Reform Commission released Guangdong 2019 Key Construction Projects Plan,which consists of 1170provincial-level key projects and 628 provinciallevel key preparatory projects of which the preliminary work is being carried out.'Rubidium Tin Polymetallic Ore Exploring Project of Tiantangshan Mine Area,Mabugang,Longchuan County,Guangdong”owned by Guangdong Guangding Mining Group was selected into this Plan.展开更多
With the rapid development of industries such as fifth generation(5G),semiconductors,and electric vehicles,the exploitation and utilization of tin resources in China are advancing towards a greater scale,intensificati...With the rapid development of industries such as fifth generation(5G),semiconductors,and electric vehicles,the exploitation and utilization of tin resources in China are advancing towards a greater scale,intensification,and standardization.The tin industry is undergoing a critical period of transformation,upgrading,and high-quality development,which will significantly drive the demand for tin.Therefore,ensuring the security of tin resources has become increasingly important.Based on introducing the distribution,current status,production capacity,and supply-demand situation of global and Chinese tin resources,this paper analyzes the future trends in the supply and demand of tin resources and addresses key challenges in the tin industry.Finally,recommendations are proposed to enhance the security of China's tin resources and offer valuable insights into mining management,development,utilization,and investment.展开更多
This paper has reported the first application of 40Ar/39Ar dating to orthoclase from Oitianling granite. The resultant plateau ages yielded by three orthoclase specimens 2KL-17, 99LQ-2 and 2KL-31 (Note: The last one w...This paper has reported the first application of 40Ar/39Ar dating to orthoclase from Oitianling granite. The resultant plateau ages yielded by three orthoclase specimens 2KL-17, 99LQ-2 and 2KL-31 (Note: The last one was taken from the part of granite which had been attrib-uted to Cailing super-unit of the Indosinian Period by the former researchers) collected from the said granite are (139.57±.79) Ma, (140.55±.81) Ma and (144.91 ±.90) Ma respectively. The above-mentioned ages represent the closed 40Ar/39Ar age of the orthoclase. The consistency in age dating results, the similarity in geochemical characteristics and rock textures, and the Nw-SE orientation of orthoclase phenocrysts almost throughout the granite, provide evidence for the inti-mate relationship between the Furong super-unit and the Cailing super-unit that form the main part of the granite, suggesting that they are products of comagmatic conjugate differentiation during the Late Jurassic. This paper also makes a comparison between the ditianling granite and the Qianlishan granite.展开更多
文摘No. 6 East tin deposit in the Songshujiao orefield, Gejiu, is characterized by one-stage hydrothermal activity and monotonous country rocks. The authors selected this deposit and used the multivariate statistical analysis to study the types of association of main ore-forming elements at different temperatures and pressures and their distribution in the deposit. On that basis combined with the structural analysis of the deposit, the recto-geochemical features of No.6 East tin deposit have been revealed and the direction and channel of migration of the ore solutions in faults and the deposit have been deduced. This research can appropriately elucidate the control of faults on the migration of ore solutions and the sites where ore solutions are dispersed and accumulated, thus providing the theoretical basis for the prediction of hydrothermal deposits in question.
文摘Shaking table is a technology that is still used in processing of tin ore using water as a medium.In the application at PT Timah Tbk,the shaking table is still used to process low grade tin ore into tin ore with a standard smelting grade of PT Timah(72%-74%Sn).In processing tin ore using a shaking table,valuable minerals and impurity minerals are separated based on differences in specific gravity,size and shape of the mineral.To get the recovery of valuable minerals(recovery)and optimal grades,it is strongly influenced by the separation variables of tin ore minerals.These variables include riffle,slope of deck,washing water rate,stroke length,and deck movement speed.This study aims to vary the number of riffles,table slope and time in a laboratory scale to obtain optimal recovery and grade of tin ore.Tin ore samples were obtained from the washing residue of the Toboali Washing Plant tin ore.In the experiment,the numbers of riffles set were 16(R1),24(R2)and 34(R3).The table slopes were 2°(S1),3°(S2),and 4°(S3).Time variations were 15(T1),20(T2)and 25 min(T3).The relationship between the number of riffles and the grade can be determined through quadratic polynomial regression analysis with the functionŶ=-20.60+2.26X+(-0.04X2),while the relationship between the number of riffles and recovery is determined by the functionŶ=-173.33+17.376 X+(-0.315X2).Optimal levels are obtained at variations in the number of riffle 26 by 66.43%,with levels of 8.45%Sn.Optimal recovery is obtained on the variation of the number of riffle 28 with a recovery of 66.43%.
文摘The Dachang tin polymetallic ore field in northern Guangxi, China, lies in a mid late Paleozoic rift that borders up the southern boundary of the Jiangnan Xuefeng Massif. As a giant ore deposit, it deposited in middle of the Nandang Hechi metallogenic zone. The ore hosting strata are of the Devonion, which shows the evident characteristics of polymetallic elements, i.e., Sn, Zn, Pb, Sb, As, Cu, Ag, In, Ge, Cd, et al., and over 1 000 000 t tin reserves.
基金Project(40072032) supported by the National Natural Science Foundation of ChinaProject(2004YX06) supported by the Yunnan Province-Institutes/Universities’ Science and Technology Cooperation Project Item
文摘Bainiuchang silver-polymetallic ore deposit is located in the southeast Yunnan tin-polymetallic metallogenic belt.The probable reserves and inferred resources of the deposit are of 6 470 t Ag and 1.10 Mt Pb and 1.72 Mt Zn and 86 kt Sn.Orebodies of the deposit occur in clastic-carbonate rocks of Tianpeng Formation and Longha Formation of the middle Cambrian System above the Bainiuchang concealed granite of the late Yanshan period.The concealed granite has the characteristics of tin-bearing granites.Abundance of the mineralization elements Sn,Cu,Zn,Pb,Ag and Sb is high in the granitic rocks.Sulphur isotope data of the metal sulphides indicate that most sulphur is derived from the magmas.The ores are similar in rare earth element(REE)patterns to the granitic rocks.The granitic magma activity results in ore-bearing structures.Rocks of the Middle Cambrian System above the concealed intrusion suffer from skarnization,hornfelsing,marbleization,siliconizing and carbonatization.The mineralization elements Sn,Cu,Zn,Pb,Ag and Sb successively appear from the top of the granite to surrounding rocks.These evidences indicate that the granitic magmatism is the principal mineralization factor.The opinion that the south Bainiuchang ore field and the north Awei ore block are tin and copper potential exploration areas was put forward and was verified by drilling tests.
文摘Recently,Guangdong Development and Reform Commission released Guangdong 2019 Key Construction Projects Plan,which consists of 1170provincial-level key projects and 628 provinciallevel key preparatory projects of which the preliminary work is being carried out.'Rubidium Tin Polymetallic Ore Exploring Project of Tiantangshan Mine Area,Mabugang,Longchuan County,Guangdong”owned by Guangdong Guangding Mining Group was selected into this Plan.
基金financially supported by the National Mineral Survey Project of China Geological Survey(No.DD20230040)the Consulting Research Project of the Chinese Academy of Engineering(No.2024-XBZD-10)
文摘With the rapid development of industries such as fifth generation(5G),semiconductors,and electric vehicles,the exploitation and utilization of tin resources in China are advancing towards a greater scale,intensification,and standardization.The tin industry is undergoing a critical period of transformation,upgrading,and high-quality development,which will significantly drive the demand for tin.Therefore,ensuring the security of tin resources has become increasingly important.Based on introducing the distribution,current status,production capacity,and supply-demand situation of global and Chinese tin resources,this paper analyzes the future trends in the supply and demand of tin resources and addresses key challenges in the tin industry.Finally,recommendations are proposed to enhance the security of China's tin resources and offer valuable insights into mining management,development,utilization,and investment.
文摘This paper has reported the first application of 40Ar/39Ar dating to orthoclase from Oitianling granite. The resultant plateau ages yielded by three orthoclase specimens 2KL-17, 99LQ-2 and 2KL-31 (Note: The last one was taken from the part of granite which had been attrib-uted to Cailing super-unit of the Indosinian Period by the former researchers) collected from the said granite are (139.57±.79) Ma, (140.55±.81) Ma and (144.91 ±.90) Ma respectively. The above-mentioned ages represent the closed 40Ar/39Ar age of the orthoclase. The consistency in age dating results, the similarity in geochemical characteristics and rock textures, and the Nw-SE orientation of orthoclase phenocrysts almost throughout the granite, provide evidence for the inti-mate relationship between the Furong super-unit and the Cailing super-unit that form the main part of the granite, suggesting that they are products of comagmatic conjugate differentiation during the Late Jurassic. This paper also makes a comparison between the ditianling granite and the Qianlishan granite.
