可控源音频大地电磁测深法在隐伏铁多金属矿勘查中的应用效果

可控源音频大地电磁法是勘探深部隐伏矿床的一种重要物探方法,但是其在铁多金属矿方面的试验研究较少。通过采用可控源音频大地电磁法对青海省某矿区铁多金属矿上进行试验研究,通过采用winglink软件对可控源音频大地电磁数据进行反演,反演结果在矿体位置具有较明显的低阻异常,表明可控源音频大地电磁法对浅部水平板状体有良好的勘探效果。通过反演结果,我们可进一步看出在已知矿体的下部还存在一处规模较大的低阻良导体,推测为深部隐伏铁多金属矿,表明该方法在深部隐伏铁多金属矿勘查中具有较好的应用效果。     

CSAMT法在寿昌盆地地热勘查中的应用

可控源音频大地电磁测深(CSAMT)具有勘探深度大、分辨力高等特点广泛应用于金属矿勘查、地热资源勘查等领域,相较于常规电法其在勘探深度等方面有无可替代的效果。以寿昌盆地CSAMT探测成果为基础,总结CSAMT法在该区深部地热资源勘查中的应用。     

可控源音频大地电磁法在高楼山金矿深部找矿中的应用

高楼山金矿位于甘肃省文县地区,金矿脉主要赋存于下泥盆统,赋存岩石主要为黄铁矿化较强的低阻破碎蚀变千枚岩。常规直流电法在矿区施工时存在低阻屏蔽和勘探深度太浅的问题,难以满足深部找矿的需求。而可控源音频大地电磁法（CSAMT）以大地电磁（MT）法为基础,具有抗干扰能力强、勘探深度大、布设极距小以及对地形要求较低等诸多优点,因此被广泛应用于固体矿产勘探中。结合早期在矿化密集区域布设的1条CSAMT剖面,寻找地下低阻破碎蚀变带的位置,并开展异常钻孔验证结果表明,该方法在高楼山金矿深部找矿中切实有效,为在高楼山金矿大规模使用提供了依据。     

CSAMT法在黔东南金矿深部找矿中的应用——以三什江金矿点为例

黔东南金矿石与围岩电阻率、极化率差异不大,地表矿体出露较为零星,地质推测成规模矿体埋深较大,常规的物探勘探方法难以达到要求。结合可控源音频大地电磁法(CSAMT)具有勘探深度大、受地形起伏影响小、分辨率高、对高阻层穿透效果好等深部找矿优势特点。笔者在综合研究该区地质资料、物性参数的基础上,对黔东南地区三什江—猫儿塘一带金矿开展了CSAMT法勘探,并采用Occam算法对CSAMT实测数据进行反演,成功地圈定了电阻率异常区域,有效地指导钻孔设计。见矿效果较好,验证了CSAMT方法在该区深部金矿找矿工作中的有效性,可为该区寻找同类深部金矿提供借鉴。     

电磁法在新疆若羌山坡一铜镍矿中的应用

电磁法勘探深度大、对隐伏的盲矿体具有较强的分辨能力,其分辨能力优于其它勘探方法,特别是低阻层的分辨力高,而又不受高阻层的屏蔽影响,在寻找铜镍矿方面有较好的效果,电磁法在大平梁铜矿的应用,给找矿带来了新的突破。     

航空瞬变电磁法对地下低阻目标体的响应能力分析

航空瞬变电磁法具有速度快、效率高、勘探深度大、分辨率高、地形影响小、对良导体探测能力强等优点。在研究航空瞬变电磁异常及后期钻探验证结果的基础上,分析了航空瞬变电磁法对地下低阻目标体响应的能力,认为航空瞬变电磁法反映低阻异常的效果明显,并具有一定的深探测能力。     

大功率电磁法在青海锡铁山矿区绿石岗—红石岗矿段深部找矿上的应用

绿石岗—红石岗矿段位于锡铁山块状硫化物多金属矿带的东南部,区内地质特征与锡铁山铅锌多金属矿段类似。总结了区内矿床地质特征及岩矿石电性特征,在绿石岗—红石岗矿段应用可控源音频大地电磁测深法和瞬变电磁法开展深部找矿工作,划分了含矿地层,圈定找矿靶区4处。应用成果表明,可控源音频大地电磁测深法与瞬变电磁法相结合进行深部找矿,效果较好。     

物探新方法-多通道瞬变电磁法在金属矿勘探中的应用

多通道瞬变电磁法是一种新的电磁勘探方法,具有分辨率高和探测深度大等优点。多通道瞬变电磁法同时记录发射电流和多道接收电压,通过接收电压和发射电流的互相关可以估计大地脉冲响应的峰值时刻,从而得到一种新的视电阻率剖面,能够很好地反映地下地电结构。通过对多通道瞬变电磁法野外工作与数据处理方法进行探讨,在内蒙古巴尔陶勒盖-复兴屯银铅锌多金属矿普查区进行了多通道瞬变电磁法实际勘探。野外数据采集时,通过240 m（或480 m）接地偶极子发射电流,180道60 m接收偶极沿10.8 km的接收剖面布设采集接收电压。对采集的数据进行处理获得了多通道瞬变电磁法视电阻率剖面,该剖面与已知钻孔资料吻合很好。研究认为多通道瞬变电磁法在未来金属矿勘探中具有良好的应用前景。     

基于矿山采空区工程的瞬变电磁法勘探原理分析

针对瞬变电磁法对探测深部区域具有良好的勘探效果,为此提出基于矿山采空区工程的瞬变电磁法勘探原理分析。分析矿山采空区工程,确定瞬变电磁法勘探依据;通过确定回线长度、布线、多功能电法仪探测,完成瞬变电磁法的野外勘探;将采集到的感应电动势数据转化为电阻率,分析矿山采空区地质异常特征,实现了基于矿山采空区工程的瞬变电磁法勘探原理分析。     

基于EH4高频大地电磁测深数据的时频分析

随着科学技术的不断发展,EH4高频大地电磁测深技术等先进技术被逐渐开,应用到金属矿测量等地球物理勘探工作当中,取得良好的应用效果。基于此,本文首先从勘探机制、方程组与线性偏振波、视电阻率三个方面入手,分析EH4高频大地电磁测深的基本原理,研究EH4高频大地电磁测深数据序列的读取方式;提出有效可行的EH4高频大地电磁测深数据时频分析方式。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.