The Huayuan Pb-Zn ore district in China,located in western Hunan Province,is a giant carbonate-hosted Pb-Zn ore district.The source of ore-forming brines in this ore district remains poorly constrained.Whether the hig...The Huayuan Pb-Zn ore district in China,located in western Hunan Province,is a giant carbonate-hosted Pb-Zn ore district.The source of ore-forming brines in this ore district remains poorly constrained.Whether the highly saline brines are derived from evaporated seawater or dissolved evaporates continues to be intensely debated.Carbonate minerals associated with Pb-Zn mineralization haveδ^(13)CV-PDB andδ^(18)OV-SMOW values ranging from−5.55‰to+1.35‰(mean value of−0.69‰;n=14)and+16.28‰to+25.05‰(mean value of+20.22‰;n=14),respectively.This indicates that carbonate minerals are dominantly formed from dissolved ore-hosted carbonate rocks.Theδ^(34)S values of sulfides range from+20.2‰to+36.8‰,with an average value of+30.0‰(n=27).These results suggest that sulfur is predominantly derived from the thermochemical sulfate reduction of marine sulfate.The crush-leach analyzed solute data of fluid inclusions in sphalerite show the ore-forming fluids have Cl/Br molar ratios range from 118 to 384,and Na/Br molar ratios from 39 to 160(n=8).These Cl/Br ratios of hydrothermal fluid are much lower than those of seawater(657 to 564),but are consistent with bittern brines through early halite precipitation.We propose that ore-forming fluids are mainly derived from evaporitic basin brines,which leached base metals from the basement and/or country rocks.The brine then migrated to the basin margins through clastic rocks of basement and then precipitated sulfides by thermochemical sulfate reduction.展开更多
Lithium halide solid-state electrolytes,with the general formula of Li_(3±m)M_(n)X_(6),are regarded as the promising families of electrolyte material for all solid-state lithium-ion batteries because of the relat...Lithium halide solid-state electrolytes,with the general formula of Li_(3±m)M_(n)X_(6),are regarded as the promising families of electrolyte material for all solid-state lithium-ion batteries because of the relatively good ionic conductivity,high oxidative stability against high-voltage oxide cathodes,and broad electrochemical stability window[1].Here,M stands for one or multiple metal elements and X for one or multiple halogen elements.展开更多
目的建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)测定注射用卤化丁基橡胶塞化学性能试验溶液中19种金属元素,并根据各元素分布情况对胶塞质量进行评价。方法采用ICP-MS法建立注射用卤化丁基橡胶...目的建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)测定注射用卤化丁基橡胶塞化学性能试验溶液中19种金属元素,并根据各元素分布情况对胶塞质量进行评价。方法采用ICP-MS法建立注射用卤化丁基橡胶塞化学性能试验溶液中锂(^(7)Li)、硼(^(11)B)、镁(^(24)Mg)、铝(^(27)Al)、钒(^(51)V)、铬(^(52)Cr)、钴(^(59)Co)、镍(^(60)Ni)、铜(^(63)Cu)、锌(^(66)Zn)、砷(^(75)As)、钼(^(95)Mo)、镉(^(111)Cd)、锡(^(118)Sn)、锑(^(121)Sb)、钡(^(137)Ba)、钨(^(183)W)、汞(^(201)Hg)、铅(^(208)Pb)共19种元素同时测定的方法,并考察元素分布情况。结果测定方法中所有元素的线性相关系数(r)均>0.9990,检出限在0.0001~5.000μg·L−1,重复性和稳定性的相对标准偏差(relative standard deviation,RSD)均<10%,加样回收率在90%~120%。结论ICP-MS法可准确同时测定注射用卤化丁基橡胶塞化学性能试验溶液中19种元素含量,为卤化丁基橡胶塞国家标准提高提供参考,为卤化丁基橡胶塞的风险监测提供科学实验基础。展开更多
基金financially supported by the Geological Survey Program of China Geological Survey Bureau(Grant No.12120114016601)。
文摘The Huayuan Pb-Zn ore district in China,located in western Hunan Province,is a giant carbonate-hosted Pb-Zn ore district.The source of ore-forming brines in this ore district remains poorly constrained.Whether the highly saline brines are derived from evaporated seawater or dissolved evaporates continues to be intensely debated.Carbonate minerals associated with Pb-Zn mineralization haveδ^(13)CV-PDB andδ^(18)OV-SMOW values ranging from−5.55‰to+1.35‰(mean value of−0.69‰;n=14)and+16.28‰to+25.05‰(mean value of+20.22‰;n=14),respectively.This indicates that carbonate minerals are dominantly formed from dissolved ore-hosted carbonate rocks.Theδ^(34)S values of sulfides range from+20.2‰to+36.8‰,with an average value of+30.0‰(n=27).These results suggest that sulfur is predominantly derived from the thermochemical sulfate reduction of marine sulfate.The crush-leach analyzed solute data of fluid inclusions in sphalerite show the ore-forming fluids have Cl/Br molar ratios range from 118 to 384,and Na/Br molar ratios from 39 to 160(n=8).These Cl/Br ratios of hydrothermal fluid are much lower than those of seawater(657 to 564),but are consistent with bittern brines through early halite precipitation.We propose that ore-forming fluids are mainly derived from evaporitic basin brines,which leached base metals from the basement and/or country rocks.The brine then migrated to the basin margins through clastic rocks of basement and then precipitated sulfides by thermochemical sulfate reduction.
文摘Lithium halide solid-state electrolytes,with the general formula of Li_(3±m)M_(n)X_(6),are regarded as the promising families of electrolyte material for all solid-state lithium-ion batteries because of the relatively good ionic conductivity,high oxidative stability against high-voltage oxide cathodes,and broad electrochemical stability window[1].Here,M stands for one or multiple metal elements and X for one or multiple halogen elements.
文摘目的建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)测定注射用卤化丁基橡胶塞化学性能试验溶液中19种金属元素,并根据各元素分布情况对胶塞质量进行评价。方法采用ICP-MS法建立注射用卤化丁基橡胶塞化学性能试验溶液中锂(^(7)Li)、硼(^(11)B)、镁(^(24)Mg)、铝(^(27)Al)、钒(^(51)V)、铬(^(52)Cr)、钴(^(59)Co)、镍(^(60)Ni)、铜(^(63)Cu)、锌(^(66)Zn)、砷(^(75)As)、钼(^(95)Mo)、镉(^(111)Cd)、锡(^(118)Sn)、锑(^(121)Sb)、钡(^(137)Ba)、钨(^(183)W)、汞(^(201)Hg)、铅(^(208)Pb)共19种元素同时测定的方法,并考察元素分布情况。结果测定方法中所有元素的线性相关系数(r)均>0.9990,检出限在0.0001~5.000μg·L−1,重复性和稳定性的相对标准偏差(relative standard deviation,RSD)均<10%,加样回收率在90%~120%。结论ICP-MS法可准确同时测定注射用卤化丁基橡胶塞化学性能试验溶液中19种元素含量,为卤化丁基橡胶塞国家标准提高提供参考,为卤化丁基橡胶塞的风险监测提供科学实验基础。
