西藏波龙铜矿磁异常特征及找矿方向浅析

多龙矿集区内各矿床成矿模式不同,找矿方法各有特点.根据波龙矿区内地质体的磁性特征,开展磁法测量工作,圈定磁法异常范围,确定异常分布位置.矿区内含矿岩体中广泛发育有磁铁矿,通过分析磁法异常与矿体特征之间关系,利用磁法测量成果,指导下一步找矿方向.     

浅谈高精度磁测在粤北某多金属矿区勘查中的应用

高精度磁测在多金属矿区勘查中应用广泛,它对弱磁性目标物的勘查以及隐伏磁性体在地表产生的弱磁异常研究都有良好的效果。本文是通过对在粤北某多金属矿区开展高精度磁测扫面工作,探测矿区多金属矿化引起的磁异常,结合地质成矿规律进行综合解释,对多金属矿化体深部找矿进行预测,为下一步开展地质找矿或工程验证提供靶区。     

青海南戈滩矿区地球物理特征及找矿模式

南戈滩矿区位于青海省都兰县柴达木盆地东南部,是一个与闪长玢岩有关的矽卡岩型铁多金属矿床。以闪长玢岩岩脉为中心,矿床分为南北2个矿带。矿体赋存在断裂蚀变带中,闪长玢岩脉、矽卡岩化带、矿体和断裂产出一致。对矿区不同的岩（矿）石进行了磁性和电性参数的测定和统计。统计结果表明：矿体的磁性强、极化率高、电阻率低;而围岩的磁性低、极化率低、电阻率高。矿体和围岩存在明显的物性差异,为在本区开展磁法和电法工作提供了物性前提。通过在矿区开展1∶1万磁法和激电法扫面工作,圈定了3处磁异常和1条激电异常带。在磁、电异常重合的地段布设了3条SIP频谱激电测深剖面,圈定了3个SIP极化率断面异常,异常走向NE,倾向近直立,经钻孔验证,SIP极化率异常由矿（化）体引起。SIP的电阻率异常在矿（化）体上方显示有高阻异常,这可能是矿体赋存的裂隙空间对电流排斥的结果,所以矿体上表现的电阻率异常并不一定都是低阻。以物探在南戈滩矿区具有较好的找矿效果为基础,提出了在南戈滩矿区及其外围寻找以铁为主的多金属矿床模式：首先用磁法和激电中梯进行1∶1万扫面工作,圈定磁异常和激电异常,然后在同时存在磁异常和激电异常的地表进行SIP频谱激电测深剖面测量,剖面垂直地表磁异常和激电异常测量,圈定SIP断面极化率异常,对极化率异常进行工程揭示。     

物探在鸭鸡山铜钼矿地质勘查中的应用

鸭鸡山铜钼矿区地表大部分被较厚的第四系沉积层所覆盖,增加了探矿施工难度和风险.通过物探电法工作,推断出区内构造、含矿异常带的产出部位及产状,有效地指导了钻探施工,提高了探矿效率,降低了探矿风险和成本,探矿效果显著.     

内蒙古自治区科尔沁右翼前旗学校屯铜多金属矿找矿预测

矿产资源的探测是各个矿山的重要工作。为了摸清矿区的找矿潜力,本次工作通过采用1∶25 000地质填图、1:25 000土壤测量、1:10 000地质、化探、物探激电中梯、高精磁法综合剖面测量、高精磁面积测量,以及槽探和钻探等多种技术手段。目前,1:10 000的化探共获得3个多元素组合异常,形成了一条近北西南东向的异常带;地质测量圈定出地表7条蚀变破碎带,其中Sb2蚀变破碎带经地表槽探揭露及钻探深部验证,发现了两条达到工业品位的铜矿体(平均品位Cu0.66×10~(-2))。通过上述工作,基本达到了大致查清学校屯铜多金属矿本区地质条件、矿化特征和地层分布、岩体形态规模、构造等目的。基本了解了铜矿体及矿化蚀变破碎带的分布、规模和产状特征,为进一步开展普查工作提供了依据。     

高精度磁测在吉林磐石自由屯铜金矿区找矿中的应用

高精度磁测成果是深部岩(矿)石磁性差异的综合反映,包含丰富的浅源信息和深源信息.通过对自由屯铜金矿区高精度磁测异常的化极、延拓和求导解译处理,识别物性结构面产状及分布,确定成矿地质体的形态及不同深度产状变化特征.自由屯铜金矿区矿化受二叠系大河深组地层岩性、断裂及岩浆岩体综合控制,矿(化)体呈脉状、透镜状产出.根据高精度...     

地球物理找矿方法在湖南临武县铷多金属矿找矿勘查中的应用

湖南临武县铷多金属矿床属于燕山早中期的岩浆岩型矿床,具有全岩矿化和规模大的特征,本文根据高精度磁法测量和激电中梯剖面测量结果,在矿区内初步圈定出7处磁异常和7处激电异常,经过查证后发现异常区在地表具有良好的矿化显示,大多数是矿致异常,总体上地球物理找矿方法在该矿床的应用中取得了良好的应用成效.因此,在今后的找矿勘查中,...     

磁电综合方法在青海南戈滩多金属矿勘查中的应用

南戈滩矿区覆盖较厚,采用单一物探方法的找矿效果不佳．为了查清矿区已知铜、铁矿咏深部延深情况,了解矿区西部覆盖区铜、铁矿脉分布及延深情况,采用高精度磁法测量和激电中梯测量方法在矿区进行综合找矿,固定磁异常3处,激电中梯极化率异常2处,并对磁异常选行化极、延拓,对Z3—1、Z3—2、Z3—3号磁异常、ηs-1号极化率异常及矽卡岩化带进行验证,布设钻孔7个,其中,4个钻孔见铜、铁矿体,1个钻孔见铅、锌矿体。通过对比研究见矿钻孔与磁、电异常的关系,发现多金属矿能同时引起磁、电异常,证实磁电综合找矿效果显著,值得推广应用。     

低空航磁在牛苦头矿区寻找矽卡岩型铅锌多金属矿中的应用

牛苦头铅锌多金属矿床位于东昆仑造山带祁漫塔格地区中西段,目前已探明Pb+Zn资源量(推断及以上)115万吨,矿区内M1和M4磁异常区已进入开采阶段,M2磁异常区目前仍处于普查阶段,矿区及外围仍然存在较大的找矿潜力,矿区铅锌多金属矿与铁矿密切共生,所以磁法找矿是牛苦头矿区探寻铅锌矿的一种有效途径,低空航空磁测具有精度高、信号强等特点,属于一种绿色而又先进的工作手段。本次工作运用1:10000低空航空磁测方法,对牛苦头矿区的深部隐伏构造及地质体进行评价。根据航磁平面特征,在牛苦头矿区共划分了9个航磁异常。根据化极后的ΔT异常等值线分布格局和方向导数异常图,共解译出5条断层。通过航磁异常三维定量反演,发现M1、M4、M2分别对三个形状大小不同的高磁异常,M2的异常范围大于M1和M4,埋深较M1和M4都大,呈陡倾状,倾向北,从三维反演结果来看,磁异常在深度上赋存于2400～3000m强度最大,横坐标上主要分布在15线到48线之间,在7线～32线强度最大,纵坐标上主要分布在ZK0002～ZK0007之间,在ZK0005～ZK0007之间异常强度最大。经钻探验证后得到证实,通过低空航磁寻找铅锌矿石是一种极其有效的手段。牛苦头矿区1:10000低空航空磁法测量为M2磁异常区开展地质找矿工作提供较为可靠的地球物理依据。     

青海南戈滩多金属矿床的地质特征及找矿前景浅析

通过研究南戈滩多金属矿区的成矿地质特征,解析高精度磁法测量异常,初步认为南戈滩矿区奥陶—志留系沙柳河群((O-S)sa)为主要的赋矿地层,花岗闪长岩体为成矿提供了热液和动力,NE向构造为主要的容矿构造。区内多金属矿(化)体磁性特征与围岩差异性大,开展的磁法测量效果明显,磁异常发育地段与矿(化)体对应较好,表明南戈滩矿区具有较好的找矿前景。     

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.     

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.     

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.     

Problems in falling in love

Certain patients enter psychoanalysis because of their inability to love another person. Often they report a repetitive erotic pursuit of desired partners, without being able to experience or maintain loving feelings. Kernberg has understood such difficulties as representing effects of early narcissistic disappointments and/or of difficulties in resolving oedipal conflicts. In this paper, Lacanian concepts of the mirror phase and symbolic love are employed to develop these issues. Sexualization of problems in mirroring may be fused with oedipal conflicts in some cases. An extended vignette is presented to illustrate the technical and theoretical issues.