GENERAL CHARACTER OF MULTISTAGES OFMETALLOGENESIS FOR MICRO-MESOTHERMAL GOLD DEPOSITS:EXAMPLES FROM ZHANG-BALING TECTONIC BELT,ANHUI,CHINA

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.

青海引胜沟岩体的锆石U-Pb年代学、地球化学特征及其地质意义

祁连造山带发育有大面积的中-酸性侵入岩。引胜沟花岗质岩体位于中祁连造山带东段，主要岩性为花岗闪长岩。LA—MC—ICPMS锆石U—Pb测年结果分别为（436．9±5．3）Ma和（453．5±6．9）Ma，表明岩体是早志留世-中奥陶世岩浆活动的产物。根据岩体的地球化学特征不同可分为两组岩石：一组岩石特征为高SiO2，w（SiO2）为71．23％～73．65％，高A／CNK值（1．19～1．39）；镁铁（MF）指数为90-92，长英质（FL）指数为87-92，显示岩浆结晶分异程度较高；W（∑REE）=22．88×10^-6～40．65×10^-6，LREE／HREE比值为1．8～2．63，（Ce／Yb）N比值为1．36～1．95；δEu=0．06～0．49，平均为0．27，负Eu异常较为明显。另一组岩石特征为低SiO2，w（SiO2）为62．35％～63．73％，低A／CNK值（0．93～1．05）；镁铁（MF）指数为81～82，长英质（FL）指数为61-65，与第一组岩石相比，岩浆结晶分异程度较低；w（∑REE）：94．10×10^-6～235．50×10^-6，（Ce／Yb）。比值为1．43-10．49，δEu=0．82～0．92。岩石地球化学特征表明，引胜沟花岗质岩体是祁连造山带由俯冲向碰撞转换的构造环境下产生的，具有壳幔混合的特点。

中医食补、穴位贴敷配合家庭环境干预对支气管哮喘患儿症状恢复及自我管理能力的影响

目的:观察对支气管哮喘患儿应用中医食补、穴位贴敷配合家庭环境干预的临床效果,评估其对患儿症状恢复及自我管理能力的影响。方法:选取2019年11月至2021年11月本院收治的83例支气管哮喘患儿作为研究对象,将患儿按照入院顺序随机分为对照组(n=41,采用家庭环境干预)和观察组(n=42,中医食补、穴位贴敷联合家庭环境干预)。观察两组患儿临床症状消退时间,评估干预前后肺功能指标及自我管理能力评分。结果:(1)干预后,观察组患儿气喘、咳嗽及哮鸣音等临床症状消退时间较对照组短,组间对比差异有统计学意义(P<0.05)。(2)干预前,两组患儿FEV_(1)、FEV_(1)/FVC及PEF评分对比差异无统计学意义(P>0.05);而干预后,患儿的肺功能各项指标中FEV_(1)、FEV_(1)/FVC及PEF评分均有一定程度的提高;同时,观察组评分提高程度较为显著,组间对比差异有统计学意义(P<0.05)。(3)干预前,两组患儿自我管理水平评分对比差异无统计学意义(P>0.05);干预后,两组患儿自我管理能力评分均升高;同时,观察组改善趋势较对照组明显,组间对比差异有统计学意义(P<0.05)。结论:中医食补、穴位贴敷配合家庭环境干预治疗支气管哮喘患儿疗效显著,能够有效缩短临床症状恢复时间,改善患儿肺功能并提高患儿自我管理能力。

建筑的时空切入点——南京外秦淮河南岸养虎巷段景观改造中的新建筑设计

结合工程设计实例探讨了在城市特殊历史风貌地段中进行新建筑设计的方法,指出应着重从建筑所处时空环境中寻求创作依据,关注建筑本体,以求得在传承基础上的创新。