青海玉树旁安金矿区地球化学异常特征及找矿潜力分析

旁安金矿区位于北巴颜喀拉造山带大场金矿田东北缘。1∶20万水系沉积物测量结果显示,Au、As、Sb元素与邻区相比具有明显高背景特征;1∶5万水系沉积物测量显示,Au元素异常规模大、强度高,并伴生Mo、Sn、Hg、W等元素异常。利用1∶1万土壤地球化学测量缩小找矿靶区,圈出以Au元素为主的土壤综合异常15处(AP1—15),异常浓集中心突出,梯度变化大,套合好;综合异常受北西向断裂和早—中三叠世昌马河组双重控制。通过对土壤综合异常AP2、AP6查证,探获4条矿体,金资源量2.08 t,金平均品位2.76×10^-6,该矿床达到小型规模,证实综合异常为矿致异常。通过对区域成矿地质条件的分析,并与邻近大场金矿区进行对比,结合土壤地球化学测量结果,认为旁安金矿区具有良好的找矿潜力。     

河南嵩县九仗沟金矿床地球化学特征与勘查模式

九仗沟金矿位于熊耳山—外方山矿集区内的蛮峪—店房金矿带北段,是典型的大型构造蚀变岩型金矿床。采用1/5万水系沉积物测量圈定了找矿靶区,1/1万土壤地球化学测量确定了矿化富集部位,岩石地球化学(原生晕)测量识别出构造破碎带和矿化强度,并预测矿体相对剥蚀程度。研究表明：不同尺度地球化学测量为该金矿勘查提供了不同阶段的找矿信息,找矿效果显著。其中,利用水系沉积物测量在九仗沟矿区范围内圈定了11-丙-Au异常,利用土壤地球化学测量发现了九仗沟1-甲₁-Au-Ag-Pb-Cu-Hg-AsBi-Ni异常,利用原生晕剖面微量元素峰值部位确定了F₁构造矿化蚀变带。通过总结该矿床地球化学异常特征和找矿标志,建立了勘查地球化学模式,为区域及矿区周边相同类型的金矿勘查提供理论指导。     

甘肃寨上金矿综合信息找矿模型研究

寨上金矿床位于西秦岭岷礼成矿带西段,属于中低温热液矿床,文章对寨上金矿的地质、物探和化探等找矿信息进行了总结研究,从而建立了该区找矿综合模型。（1）地质找矿信息：寨上金矿大地构造位置处于西秦岭中带的西成-凤太-镇旬拉张裂陷盆地内,成矿受断裂和褶皱构造双重控制,赋矿层位为中泥盆统安家岔组和下二叠统十里墩组下段碎屑岩和碳酸盐岩,矿体产于NWW向的层间断裂中,硅化、黄铁矿化、毒砂化和褐铁矿化发育,是直接的找矿标志。（2）地球物理找矿信息：大量的电法测量表明,该区金矿脉具有低阻高极化特征,围岩与矿体电性差异较大,因此处于低阻带中的极化率异常、破碎带和金属硫化物同时存在时,找矿的指示意义较大。（3）地球化学找矿信息：该区1∶20万、1∶5万水系沉积物异常与金矿床吻合较好,Au、As、Sb和Hg元素异常套合明显,重现性强,为寨上矿区的发现起到了重要的指示作用;1∶1万土壤异常对矿区找矿的作用更为有效。     

甘肃党河南山地区腾龙金矿地质地球化学特征

腾龙金矿位于党河南山金成矿带上,是由断裂构造控制的蚀变岩型金矿。通过1︰5万水系沉积物测量,在本区圈定了AS-7综合异常,并进一步利用1︰1万岩屑测量进行解剖,发现了腾龙金异常区,经过后期工程揭露,圈定了有价值的金矿体13条。综合研究表明,勘查区金矿体走向严格受断裂控制,主矿体的延伸方向与岩屑测量圈定的综合异常长轴展布方向一致,充分证明了在该区运用化探手段找矿的重要指导作用。     

湖南雪峰金矿田地球化学异常特征及其指示意义

雪峰金矿田是近年确立的湖南找金的重点区域。该区金的成矿地质条件优越,各类异常均反映了金矿化的存在,Au、As是最重要的指示元素,两者吻合程度好。异常与断裂构造控制的矿化形态及产状关系密切,进一步说明该区金矿是以断裂控矿为主。不同化探方法均具一定的找矿效果,所圈定的异常浓度分带清晰,指示作用明显。水系沉积物异常指示了找矿地段;次生晕异常指示了矿带位置及延伸;原生晕异常指示了蚀变矿化带或矿体部位;汞气异常能指示含金断裂破碎带或含金石英脉的存在。充分说明地球化学异常对金矿具有重要指示意义。     

青海南巴颜喀拉造山带扎开陇巴地区地质特征及金矿找矿前景

扎开陇巴位于可可西里—南巴颜喀拉山印支期(金、锑、钨、锡、稀有金属)成矿带,金、锑成矿地质条件优越。根据扎开陇巴地区金矿预查取得的成果,结合区域地质资料,从地层、构造、岩浆活动、变质作用及化探异常等方面对区内金成矿条件进行了分析,指出三叠系清水河组,与区域性NW-SE向深大断裂平行展布的次级断层破碎带,石英脉及Au、As、Sb多元素组合异常发育地段是有利成矿部位,表明扎开陇巴地区具有良好的金矿找矿前景。今后地质勘查应充分利用区域地质、化探资料,调整工作区块,加大德拉河流域金矿勘查力度,有望在扎开陇巴地区取得大的金矿勘查突破。     

胶东腊子沟金矿区构造地球化学特征与找矿预测

腊子沟金矿区位于牟平—乳山成矿带中段。本次完成了腊子沟金矿区地表约6 km~2及矿体纵投影剖面20线—123线的构造地球化学测量。地表测量结果显示,Au异常高值点沿金牛山断裂呈串珠状展布,在金牛山断裂上盘发现一断续分布的Au异常带,As、Ag、Cu、Pb、Mo、Bi等元素异常与Au异常有显著套合性。结合多元统计分析,厘定腊子沟金矿区隐伏矿体找矿的构造地球化学标志为Au-As元素组合异常及斜交参考因子得分Y(i,1)异常。根据地表与剖面构造地球化学异常分布及找矿标志,圈定找矿靶区3处。     

物化遥综合找矿方法在西藏隆子县拉九地区的应用

西藏隆子县拉九地区成矿地质条件优越,寻找金多金属矿的潜力较大。在综合分析区域地质背景的前提下,通过遥感地质解译研判成矿有利部位,确定拉九地区为成矿预测Ⅳ区,利用1/5万水系沉积物测量进行扫面,圈定了多处化探综合异常。选择在拉九异常(HS-13-B₂)内,开展1/1万土壤地球化学剖面测量、壤中1/1万汞气测量及激电中梯测量等大比例尺化探物探工作,初步圈定了2处化探综合异常,发现3个极化体和2处视极化率异常,优选其中有利的成矿靶区,经异常查证和槽探工程揭露,发现3条金矿矿化蚀变带,实现了找矿新发现。基于物化遥综合找矿信息初步建立了以矿床地质—地球化学—地球物理—遥感特征为标志的综合信息找矿模型。实践证明,运用物化遥综合找矿方法可极大地提高找矿效率,该工作为今后在高原山区开展多金属找矿勘查提供了参考。     

通化二密铜矿东南区553中段含金石英脉的地质特征及其意义

二密铜矿东南区533中段含金石英脉严格受北西向断裂构造控制,并被近南北向23号铜矿脉穿切。结合区域成矿规律及矿区1/20万水系沉积物测量结果认为,本矿区具有金矿成矿的地质条件,并存在一个独立的以金为主的成矿阶段,矿区金矿的找矿前景较为理想。     

湘西龙王江锑砷金矿带地球化学异常及其找矿意义

龙王江锑砷金矿带成矿严格受断裂构造控制。其地球化学异常在验证矿化类型、含矿性和发现矿床方面都取得了明显的地质效果。化探找金过程中,在注意Au异常的同时,加强对As异常的研究将有助于找矿。     

风吹石墨在莱钢6m焦炉的应用

针对石墨在焦炉内的生成机理,对莱钢7号、8号焦炉炉墙上的石墨采用压缩空气进行吹扫,有效控制了石墨的生长速度,降低了劳动强度。     

浅谈博茨瓦纳某工程项目管理经验和总结

以博茨瓦纳某地方法院工程为例，简要介绍了在非洲承揽工程项目的管理经验和总结。     

Advances in Organolanthanide Chmistry in China

ＡｄｖａｎｃｅｓｉｎＯｒｇａｎｏｌａｎｔｈａｎｉｄｅＣｈｍｉｓｔｒｙｉｎＣｈｉｎａＳｈｅｎＱｉ（沈琪）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＳｕｚｈｏｕＵｎｉｖｅｒｓｉｔｙ，Ｓｕｚｈｏｕ２１５００６，Ｃｈｉｎａ）Ｒｅｃｅｉｖｅｄ：Ａｐｒｉｌ２...     

武钢炼焦技术进步

介绍武钢焦化公司50年来炼焦技术进步,重点阐述炼焦配煤技术研究、焦炉热修补维护、140t／h干熄焦技术消化以及7．63m特大型焦炉的技术创新。     

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.     

Trends in Temperature Extremes in Association with Weather-Intraseasonal Fluctuations in Eastern China

Trends in the frequencies of four temperature extremes (the occurrence of warm days, cold days, warm nights and cold nights) with respect to a modulated annual cycle (MAC), and those associated exclusively with weather-intraseasonal fluctuations (WIF) in eastern China were investigated based on an updated homogenized daily maximum and minimum temperature dataset for 1960-2008. The Ensemble Empirical Mode Decomposition (EEMD) method was used to isolate the WIF, MAC, and longer-term components from the temperature series. The annual, winter and summer occurrences of warm (cold) nights were found to have increased (decreased) significantly almost everywhere, while those of warm (cold) days have increased (decreased) in northern China (north of 40°N). However, the four temperature extremes associated exclusively with WIF for winter have decreased almost everywhere, while those for summer have decreased in the north but increased in the south. These characteristics agree with changes in the amplitude of WIF. In particular, winter WIF of maximum temperature tended to weaken almost everywhere, especially in eastern coastal areas (by 10%-20%); summer WIF tended to intensify in southern China by 10%-20%. It is notable that in northern China, the occurrence of warm days has increased, even where that associated with WIF has decreased significantly. This suggests that the recent increasing frequency of warm extremes is due to a considerable rise in the mean temperature level, which surpasses the effect of the weakening weather fluctuations in northern China.     

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.