In Zhangbaling Tectonic Belt,two types of mineralization,auriferous quartz veins and alter- ation halos,can observed within many deposits.The pressure of metallogenesis of auriferous al- teration halos ismuch higher t...In Zhangbaling Tectonic Belt,two types of mineralization,auriferous quartz veins and alter- ation halos,can observed within many deposits.The pressure of metallogenesis of auriferous al- teration halos ismuch higher than thatof quartz vein,thetemperatures ofmetallogeneses ofthese two types of orebodies are don’tthe same Geochemistry study indicates thatboth ofthem are mi- cro- mesothermal deposits related to Yanshanian granites.The results of proton microprobe analy- sis of sulphides from the gold deposits in the area show that the“invisible” gold existed in sul- phides is in the form ofmicro inclusions,and the concentration of“invisible” gold in sulphidemin- erals within quartz vein is poorerthan thatfrom alteration halos.Field observation shows thatthe structural modality of the fractures controlling the orebodies of auriferous quartz vein is different from thatof the auriferous alteration zones.The fracture controlling the orebodies of auriferous alteration halos is compress- shearfracture,auriferous quartzvein is controlled by extensive fault. The alteration halos crosscut by auriferous quartz vein.The wallrocks of the former altered strongly and developed alteration zones well.The wallrocks of auriferous quartz vein altered slightly.The results of tectonogeochemical study shows that the concentration of associated met- allogenesis elements and intensity of alteration are positively correlated with tectonic deformation strength for auriferous alteration halos.Itindicates that it is probably a general character for mi- cro- mesothermal gold deposits due to the multistages of metallogeneses took place.The tectonic environmentis the most important fact determining the mechanism of fluid flow and precipitationof gold,and then the types of mineralization and modes of gold.展开更多
脱脂是蚕蛹精制过程中的重要环节,脱脂过程中保持蚕蛹蛋白的活性十分必要。旨在对蚕蛹超声辅助常温脱脂工艺进行研究,采用响应面分析法对工艺条件进行优化,并建立相应的预测模型。单因素实验和响应面法优化得到蚕蛹超声辅助常温最佳脱...脱脂是蚕蛹精制过程中的重要环节,脱脂过程中保持蚕蛹蛋白的活性十分必要。旨在对蚕蛹超声辅助常温脱脂工艺进行研究,采用响应面分析法对工艺条件进行优化,并建立相应的预测模型。单因素实验和响应面法优化得到蚕蛹超声辅助常温最佳脱脂工艺为:石油醚-丙酮(3∶7)为溶剂,液料比11 m L/g,超声功率125 W、超声时间27 min,温度40℃左右;在该脱脂条件下,蚕蛹脱脂率为(96.8±0.8)%。各因素对蚕蛹脱脂率的影响程度由强至弱依次为:液固比>超声时间>超声功率。溶剂类型和液固比是影响蚕蛹脱脂效率的决定性因素,超声辅助脱脂具有脱脂温度低,脱脂时间短,物质活性不易破坏,脱脂率高的优点。展开更多
文摘In Zhangbaling Tectonic Belt,two types of mineralization,auriferous quartz veins and alter- ation halos,can observed within many deposits.The pressure of metallogenesis of auriferous al- teration halos ismuch higher than thatof quartz vein,thetemperatures ofmetallogeneses ofthese two types of orebodies are don’tthe same Geochemistry study indicates thatboth ofthem are mi- cro- mesothermal deposits related to Yanshanian granites.The results of proton microprobe analy- sis of sulphides from the gold deposits in the area show that the“invisible” gold existed in sul- phides is in the form ofmicro inclusions,and the concentration of“invisible” gold in sulphidemin- erals within quartz vein is poorerthan thatfrom alteration halos.Field observation shows thatthe structural modality of the fractures controlling the orebodies of auriferous quartz vein is different from thatof the auriferous alteration zones.The fracture controlling the orebodies of auriferous alteration halos is compress- shearfracture,auriferous quartzvein is controlled by extensive fault. The alteration halos crosscut by auriferous quartz vein.The wallrocks of the former altered strongly and developed alteration zones well.The wallrocks of auriferous quartz vein altered slightly.The results of tectonogeochemical study shows that the concentration of associated met- allogenesis elements and intensity of alteration are positively correlated with tectonic deformation strength for auriferous alteration halos.Itindicates that it is probably a general character for mi- cro- mesothermal gold deposits due to the multistages of metallogeneses took place.The tectonic environmentis the most important fact determining the mechanism of fluid flow and precipitationof gold,and then the types of mineralization and modes of gold.
文摘脱脂是蚕蛹精制过程中的重要环节,脱脂过程中保持蚕蛹蛋白的活性十分必要。旨在对蚕蛹超声辅助常温脱脂工艺进行研究,采用响应面分析法对工艺条件进行优化,并建立相应的预测模型。单因素实验和响应面法优化得到蚕蛹超声辅助常温最佳脱脂工艺为:石油醚-丙酮(3∶7)为溶剂,液料比11 m L/g,超声功率125 W、超声时间27 min,温度40℃左右;在该脱脂条件下,蚕蛹脱脂率为(96.8±0.8)%。各因素对蚕蛹脱脂率的影响程度由强至弱依次为:液固比>超声时间>超声功率。溶剂类型和液固比是影响蚕蛹脱脂效率的决定性因素,超声辅助脱脂具有脱脂温度低,脱脂时间短,物质活性不易破坏,脱脂率高的优点。
