青海达里吉格塘金矿床地质特征及远景评价

达里吉格塘金矿是沟里整装勘查区2013年发现的构造蚀变岩型矿床,矿体的分布严格受破碎蚀变带构造控制,破碎蚀变带均多产于蚀变花岗岩带内,与北西向区域性构造线一致,通过分析矿床的地质特征,主要从成矿地质条件,地层、构造、岩浆岩以及伴生的围岩蚀变类型、组合、形态分布、矿化特征、矿化分带规律等方面进行了全面分析,厘定了矿化体与之匹配的空间关系,总结金矿化体成矿规律及找矿标志,并对矿区成矿远景作了评价(康恺等,2019)。     

陕西省太白县东沟金多金属矿床地质特征及控矿因素分析

东沟金多金属矿床位于西秦岭凤太矿集区东部,矿体赋存于泥盆系地层中,金矿(化)体的产出严格受星红铺组千枚岩地层的控制,NW向构造发育程度控制着金矿化的强度。矿区已发现多条矿带,容矿岩石主要为铁白云质粉砂质千枚岩,矿石类型主要为石英脉型,属构造蚀变岩型金矿床。综合矿区地层、构造、蚀变特征、控矿因素等认识,认为东沟金矿成矿地质条件有利,有形成中型金矿床的可能。     

西秦岭李子园碎石子斑岩型金矿床地质特征及成矿时代

西秦岭李子园碎石子金矿床受闪长玢岩脉和断裂破碎带的双重控制,矿体上部主要产于闪长玢岩脉附近的断裂破碎带中,矿体下部产于闪长玢岩脉内部;矿石中金属矿物主要为黄铁矿、黄铜矿、方铅矿;黄铁矿为主要的金、银的载体矿物,矿石以细脉-浸染状、细脉-网脉状构造为主,具有斑岩型矿床的蚀变类型特点.矿区与成矿有关的正长斑岩和闪长玢岩的锆...     

河北省阜平县南庄旺一带金、银多金属矿地质特征

南庄旺一带蚀变、矿化主要受NW向及其次级断裂构造控制,矿床成因类型为高温热液矿床,矿区内发现多条矿化蚀变带,其中以Ⅱ号蚀变矿化带为主,Ⅱ号矿化蚀变带位于北西向断裂构造带,长1900米,宽10-40米,最宽处可达100余米,总体走向325°,北东倾,倾角70°左右,局部地段近于直立或反倾。矿石类型主要为金属硫化物-破碎带蚀变岩型。     

江西樟东坑钨钼矿床“上钨下钼”垂向分带规律浅析

江西大余樟东坑钨钼矿属外接触带石英单脉型矿床,含矿石英脉具"上钨下钼"垂向矿化分带规律,近年在矿区深部发现蚀变花岗岩钼(钨)矿化,矿床呈现"上脉下体、上钨下钼"成矿构式。初步分析认为,这一成矿构式是区域构造应力与成矿花岗岩演化耦合的结果,隐伏花岗岩侵位高度是影响石英脉垂向矿化分带的主导要素,蚀变岩脉是矿区花岗岩型钼(钨)矿找矿标志和突破方向。     

甘肃鹿儿坝金矿床地质特征及找矿标志

鹿儿坝金矿是产于西秦岭中三叠统浅变质沉积岩建造中的大型金矿床。通过研究矿床地质特征、热液活动及围岩蚀变等特征,分析控矿条件,认为中三叠统碎屑岩夹碳酸盐岩建造是本区金成矿的母岩和围岩;近EW向构造控矿作用明显,近EW和NW向构造交会处是富矿体的赋存部位;矿体与闪长玢岩脉关系密切,在矿区深部为热液活动提供了热动力。矿区矿体赋存状态、矿石矿物组成和结构构造等特征表明,鹿儿坝金矿是浅成中-低温热液作用下形成的微细粒浸染型金矿床。同时,指出中三叠统碎屑岩夹碳酸盐岩建造、近EW与NW向断裂交会处以及闪长玢岩脉发育地段是该区有利的找矿标志,矿区各矿带在平面上具有等间距分布的特征,应作为下一步找矿的重点。     

湘中铃山金矿床富集规律与成矿机理研究

湖南湘中铃山金矿为破碎蚀变岩型矿床 ,产于元古界板溪群泥质碎屑岩中 ,矿化受一条整体呈北西西向展布的张扭性断裂带控制 ,矿体赋存于次级北西向蚀变破碎带中。矿体具侧伏规律 ,侧伏角 30°～ 5 0° ,具平行于两组赋矿断裂交迹线延伸的特点。围岩蚀变具分带性 ,矿体产于硅化 -黄铁矿化 -绢云母化带 (内带 )。微细粒金占 99.8% ,主要产于蚀变构造角砾岩型和网状石英脉型矿石中 ;明金仅占 0 .2 % ,主要产于沿矿体侧伏中心线分布的网状石英脉型矿石中。矿床成矿作用受地层岩性、深断裂旁侧的有利成矿构造及燕山期岩浆活动诸因素控制 ,适宜的容矿环境和适当的温压条件是金成矿的关键因素。     

甘肃省西和县安溪沟金矿地质特征与找矿潜力分析

安溪沟金矿位于吴家山复式背斜西转折端的安家岔组中,主要受张扭性断裂构造等控制,强黄铁矿化、褪色蚀变、铁白云石化、硅化等蚀变与金矿化关系密切,矿床类型为中低温岩浆期后热液型。目前发现金矿化带两条,圈定金矿体5条,金矿化体5条,矿石类型为构造角砾岩型和顺层挤压片理化蚀变岩型两种。矿体与Au相关的化探异常、低阻高极化激电异常对应较好,通过成矿地质背景、物化探异常特征、相邻金矿床对比,矿区及外围构造蚀变岩型金矿找矿潜力较好。     

青海果洛龙洼金矿地质特征及找矿潜力分析

东昆仑地区是青海省重要的贵金属、有色金属及黑色金属成矿带,其金矿储量在青海省矿产资源中占有显著的地位。果洛龙洼金矿床位于东昆仑造山带东段,为一韧性剪切带型金矿床,也是近年来新发现的又一具有重要经济价值的金矿床,目前在该矿床已发现7条金矿化体,找矿潜力较大。通过对该矿床地质特征及找矿潜力进行分析,认为该区矿化体类型主要是以黄铁矿为主的硫化物石英脉及硫化物蚀变岩型矿体,矿石矿物以黄铁矿和黄铜矿为主,围岩蚀变主要为硅化、绢云母化、黄铁矿化和绿泥石化。根据矿区出现的脉状矿化、细脉侵染型矿化特征,矿区剪切带成矿系统中具有石英脉型-构造蚀变岩型金矿成矿系列,对在该地区深部及外围的进一步找矿,扩大矿床规模等具有重要意义。     

西秦岭岷县鹿儿坝金矿床地质特征及找矿远景

鹿儿坝金矿床是西秦岭地区的一处中型金矿床,赋矿围岩主要为中三叠统光盖山组长英砂岩、粉砂岩及粉砂质板岩等。在对矿床野外地质特征、矿石矿物组成、矿石结构构造、成矿元素组合详细研究的基础上,认为该区金矿体主要受近EW向脆性断裂构造控制,与闪长玢岩脉关系密切;矿石中金属矿物主要为黄铁矿、毒砂、辉锑矿、闪锌矿;石英、黄铁矿、毒砂为主要载金矿物,矿石类型主要有蚀变构造角砾岩型、蚀变闪长玢岩型、脉状及浸染状硫化物型、褐铁矿化碎裂岩型;流体测温、矿物组合及蚀变特征显示本区为中低温热液金矿床;硫、铅同位素研究结果表明,成矿物质具有深源特征。结合区域矿床研究结果,认为鹿儿坝金矿床形成于印支末期,为与闪长岩脉有关的斑岩型-蚀变岩型金矿床,矿床剥蚀深度较浅,目前所见到金矿体可能大部分为闪长玢岩脉(体)上部破碎带中的蚀变岩型金矿床,深部具有较大的成矿和找矿潜力。     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

Fractures in childhood in Khartoum

A prospective study of fractures in 231 children received at Khartoum North Teaching Hospital(KNTH) was carried out for a period of six months. The incidence of child fracture rated as one per day, then it increased from the age of 5 years onwards in boys and between 6 and 8 years in girls. Most injuries were sustained during the day time, especially between late afternoon and sunset. 82% of injured children presented to a medical facility, while 18% were taken to native healers first. Non-road traffic accidents accounted for 84% of the fractures mainly due to sports, domestic injuries and falls; whereas road traffic accidents were 16% and occurred mainly in pedestrians. Forty three percent of the fractures needed only first aid and splintage while 42% needed closed reduction. Thirty one percent of all patients were treated as inpatients. The long bones were affected in 91% of all fractures, the commonest site being the distal end of the forearm (26%), followed by supracondylar fracture of the humerus (15.6%). In the upper limb, left-sided fractures predominated. The epiphyseal injuries were 3.5% of all fractures, mainly at the distal radial epiphysis. Boys were commonly affected between 13-15 years of age. Open fractures constituted 9.8% of the series and were mainly due to traffic accidents in town dwellers, the most vulnerable bones were those of the leg and foot. Pathological fractures accounted for 2.2% and were due to bone cysts and osteogenesis imperfecta. The problem of child safety and the preventive measures need to be more stressed.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.     

Heatstroke in runners in Oklahoma

It is a common opinion that general surgery is the first step for whoever approaches a surgical discipline, and that whoever practices training in general surgery should learn the rudiments of each surgical branch. The role of microsurgery in the training of the general surgeon has not been well-established. Clinical applications of microsurgery in general surgery are few and are rarely required, and have been connected strictly to restricted indications. However, we think that microsurgery could be very useful to the general surgeon because it allows the execution of experimental research on rats, the only possibility permitted by law. In these studies the microsurgeon can perform many times and in a short time the same surgical operation, thus improving his skill, and easily getting familiarity with surgical instruments and sutures.