桐柏县银洞坡金矿成矿规律及找矿方向探讨

银洞坡金矿位于桐柏地区北秦岭构造带,围山城金银多金属成矿带中部。矿床成因类型为变质岩来源热液型金矿床。矿床受背斜轴部构造和地层的双重控制,推断在已知矿体的深部和外围有不完全受层位控制的盲矿体存在。     

陕西旬阳县红花坪铅锌矿地质特征及找矿前景

红花坪铅锌矿位于南秦岭旬阳盆地金铜、铅锌、汞锑等多金属成矿带内,为一沉积-改造型铅锌矿床。矿区出露地层主要为古生界泥盆系和志留系一套浅变质的细碎屑岩和碳酸盐岩沉积建造,褶皱、断裂发育,热液活动强烈,为成矿物质的活化、运移创造了良好的条件。矿体赋存于下志留世梅子垭组绢云千枚岩及下部石英脉中,受一定的地层岩性、古地理环境和构造控制。目前Ⅰ-1铅锌矿体控制长度已超过1 km,矿体连续性好,形态单一,矿物成分简单,锌含量高,有望成为一中型规模的铅锌矿床。     

东秦岭斑岩型钼矿成矿带地质－地球化学找矿模式

东秦岭钼矿带是中国最大的钼成矿带,拥有６个超大型斑岩型钼矿床。对东秦岭成矿带多个大型斑岩型钼矿床地质地球化学特征进行了研究,结果表明,东秦岭成矿带主要赋矿地层为前寒武系,以元古宇地层为主要找矿标志。斑岩型钼矿床主要产于碰撞造山环境和陆内造山环境,燕山期深大断裂和区域性断裂控制了斑岩型钼矿的成矿空间,矿体围岩多具有面状蚀变分带,含矿岩体为强酸性岩体,具有高硅、高碱、高钾的特征。地球化学异常特征明显,Ｍｏ、Ｗ、Ｂｉ为主要的指示元素,异常范围与矿体具有良好的套合关系。元素还呈现明显的分带性,由矿体到围岩,元素的水平分带大致为 Ｍｏ－Ｂｉ－Ｗ－Ｓｎ－Ｃｕ－Ｐｂ－Ｚｎ－Ａｇ,显示了成矿元素由高温－中温－低温的变化规律。综合东秦岭斑岩型钼矿带多个典型矿床的地质地球化学找矿标志,初步建立了其找矿模式。      

小秦岭西南部金矿形成地质背景及成矿远景预测

本文在对小秦岭西南部灞源张家坪地区金矿形成地质背景的分析基础上，重点阐述了该区控制工业矿体的主要地质条件，包括控矿构造、岩浆岩、赋矿地层及热液活动等条件。最后通过对本区成矿地质条件及金矿化特征的总体评价，对金的成矿远景进行了地质预测，指出找到特大型或大型金矿床的希望不大，而可能在某些地带找到几处中等规模的矿床。     

耿庄金矿矿床特征及成因浅析

利用成矿理论及野外地质实测,对耿庄金矿床成矿地质背景、矿床特征、矿床成因的进一步研究,探明耿庄金矿床位于中生代吕梁太行断块五台山块隆恒山五台山穹状隆起上,矿体全部产于隐爆火山构造内,胶结疏松的崩坍角砾岩及其与爆破角砾岩、钾钠花岗斑岩的接触带是赋矿的主要部位,矿体受次级小断裂和小裂隙控制,矿化富集受地层、构造、岩浆岩的多重控制。耿庄金矿床是与次火山隐爆有关的岩浆热液型矿床,成矿环境是高压、中低温、弱酸性、低氧逸度,金、银等成矿物质主要来源于花岗岩岩浆。     

黔北铝土矿矿带基底岩系组成及空间分布与成矿作用的关系探讨

贵州省北部铝土矿分布于黔中-渝南铝土矿成矿带的南段北部,成矿地质条件较好。通过分析黔北不同矿带基底地层
岩性差异、矿体分布、矿床规模和成矿物质来源等因素之间的相互关系,探讨了铝土矿矿床下伏基底地层岩性对黔北铝土矿的控
制作用。研究表明,基底地层古风化地貌的空间变化控制着铝土矿的矿体分布和矿体规模,而基底地层的岩性特征决定了所形成
矿床的矿石质量。      

山东省蓬莱市西南王金矿床地质特征与资源前景

西南王金矿床位于栖霞-蓬莱成矿带内,是蓬莱地区西部比较典型的缓倾斜薄层石英脉型金矿床。矿体受NNE—NE向断裂控制,倾向SE,倾角15°~25°,呈薄层脉状,分布于郭家岭序列罗家单元的斑状中粒含黑云二长花岗岩和谭格庄序列牟家单元的片麻状细粒奥长花岗岩中。该文通过对矿床地质特征与矿体空间赋存规律的研究,认为矿床深部及周边区域仍有较好的资源前景。     

陕西省丹凤县蔡凹锑矿床地质特征及找矿方向

蔡凹锑矿床位于北秦岭加里东造山带内,产于古元古代秦岭群地层中,严格受区域性大断裂和界岭复式背斜两翼的次级褶皱和断裂控制。文中从分析成矿地质背景、矿床地质特征和矿床成因入手,总结了矿床的控矿因素,认为该矿床受含矿地层、构造和岩浆岩等因素控制;提出了新的找矿方向,认为蔡凹锑矿床深部仍有较大的找矿潜力,围绕有利的构造部位和矿化蚀变标志追索矿体,实现找矿勘查的突破。     

长江中下游成矿带抛刀岭大型斑岩型金矿特征及找矿前景

抛刀岭金矿位于长江中下游成矿带安庆—池州矿集区,累计金金属量大于22t,为池州地区首例大型金矿床。该矿床金矿体主要产在英安玢岩中,基本不伴生其他有益金属元素,为独立金矿床。通过详细的矿床地质特征描述,结合已有斑岩型金矿的成矿模式,同时利用以往对该含矿岩体U-Pb锆石定年及相关地球化学研究,综合分析认为该矿为产在早白垩纪岛弧背景下的贫铜斑岩型金矿床,同时局部矿段在成矿过程中还经历了热液叠加作用。矿体产出严格受NE向构造-岩浆岩带控制,含矿岩体出露面积小于1.0km2,属于典型的小岩体成大矿。运用"相似类比"、"矿床谱系"、"趋势外推"、"综合信息评价"等原则,指出该矿具有特大型金矿的潜质;同时,受同一NE向构造控制的乌石、白虎山及自来山等同期岩浆岩发育地区,具有与抛刀岭金矿类似的成矿条件,是未来工作的重点靶区;发育于上述同期岩浆岩之间的志留纪地层中的破碎带蚀变岩、与斑岩型矿床配套产出的低温热液多金属硫化物型矿床等,都将是外围工作的重点研究地区。     

胶东阎家疃金矿床地质特征及成因研究

胶东阎家疃金矿地处胶东牟乳成矿带北段,矿体受金牛山主断裂西侧的次级断裂控制,赋存于玉林店单元岩体中。通过对矿区内矿化蚀变带和矿体特征、矿石质量等方面的总结和研究,认为区内矿石类型以含金黄铁绢英岩化花岗质蚀变岩为主,局部夹少量黄铁矿化石英脉,并划分出成矿阶段。类比邻区金矿蚀变岩形成时代,结合区域成矿地质背景,认为该区矿床成因类型主要为中低温热液蚀变型金矿床。该矿床的研究,对牟乳成矿带内蚀变岩型金矿床的找矿工作提供了指示意义。     

ADVANCES IN MEDICO-CHEMICAL GEOGRAPHY IN CHINA

We have made progress in medico-chemical geography as follows: the correlative law of organism with geochemical environment; the geochemico-ecological classification of chemical elements; the types of formative cause of biogeochemical provinces in China; the parabolic correlation between contents of iodine in drinking water and prevalence rate of endemic goiter; the discovery and proof of the low selenium zone in China; the successive discovery of endemic fluorosis of the types of pollution from burning coal, drinking high fluoride tea and high fluoride table salt from the year 1978; the study on chemical geography of schistosomiasis and the compilation of the Atlas of Endemic Diseases and Their Environments in the People's Republic of China.     

临沂市与江苏省四市保障用地做法对比分析

临沂市毗邻江苏省,前者是革命老区,经济欠发达城市,后者则是全国经济发展速度最快的省份之一.经济发展形势的差异使得二者在保障用地的措施做法上产生了差别.文章以江苏省徐州市、宿迁市、南通市和扬州市为例,重点分析了经济发展较快地区化解用地矛盾的做法,并与临沂市作了比较,借以提出了可供经济欠发达地区借鉴的保障发展用地的措施建议.     

综合找矿方法在鲁西地区莱芜高家岭金矿勘查中的应用

高家岭金矿地处鲁西泰莱断陷与鲁村凹陷之间的隆起地带,矿体发育于铜冶店-孙祖断裂上盘下接触面的构造蚀变带中,通过地质、物化探综合技术手段圈定了物化探异常,指导探矿工程的布设,进而发现高家岭金矿,矿体平均品位5.61×10^-6,预测金矿金属量6788kg,达到中型矿床规模,取得了良好的找矿效果。区内综合找矿方法的应用对类似地区金矿的勘查具有借鉴意义。     

试述学校发展电化教育应注意的问题

随着信息社会的发展，新技术和新媒体的出现必然影响学校现代教育的发展。通过阐述发展学校电化教育的应注意的问题，探讨了解决问题的方法。     

山东省烟台市观水镇白垩纪基岩裂隙水供水可行性分析

近年来,由于地下水污染问题加剧,山东省烟台市观水镇生活用水矛盾日益突出,急需寻找优质地下水缓解当地居民用水问题。通过水文地质调查、地球物理勘探、实施探采结合井、抽水试验和水质化验等手段,初步查明了观水镇及附近区域的蓄水构造类型及赋存规律,圈定了优质地下水的富水地段,论证了白垩纪基岩裂隙水供水可行性,为政府相关部门决策、解决村民吃水问题提供科学建议。     

Changes in the small-jellyfish community in recent decades in Jiaozhou Bay, China

We used long term monitoring data to evaluate changes in abundance and species dominance of small-jellyfish (collected with zooplankton net whose bell diameter was less than 5 cm) between 1991 and 2009 in the Jiaozhou Bay, China. Zooplankton samples were vertically towed with conical plankton net from near-bottom to surface, identified microscopically, and mapped in time-space using Grapher 7.0 and Surfer 8.0. Results show that the abundance of small-jellyfish throughout the bay had been increasing during 2001-2009 on average of 15.2 ind./m 3 , almost 5 times higher than that between 1991 and 2000. The occurrence of peak abundance shifted from spring to summer after 2000, and two peaks appeared in spring and summer, respectively, after 2005. Both the abundance and the frequency of blooms of small-jellyfish increased after 2000 in the bay. In addition, the biodiversity of jellyfish has increased significantly in recent years with a change in dominant species. Several new dominant species appeared after 2000, including Rathkae octopunctata in winter, Phialidium hemisphaericum in spring, summer, and autumn, Phialucium carolinae in spring, and Pleurobrachia globosa in summer and autumn, while some previous dominant species throughout the 1990s (Eirene ceylonensis, Zanclea costata, Lovenella assimilis, and Muggiaea atlantica) were no longer dominant after 2000. The abundance of small-jellyfish was positively correlated with the density of dinoflagellates, and the abundance of zooplankton. We believe that the changes in smalljellyfish abundance and species composition were the result of eutrophication, aquaculture and coastal construction activities around the bay. Concurrently, seawater warming and salinity decrease in recent decades promoted the growth and reproduction of small-jellyfish in the bay.     

东营郑南斜坡带砂砾岩体储层微观特征

东营凹陷郑南斜坡带砂砾岩体是古近纪沙四段沉积时期形成的以砂、砾岩为主的近岸水下扇沉积体。储集层岩石结构成熟度和成分成熟度均较低,多为双模态和复模态结构。首先对影响储集层岩石的主要成岩作用进行了描述,分析了该砂砾岩体储集层的孔隙类型和孔隙结构特征。该类砂砾岩体储集层孔隙类型多样,孔隙结构复杂,以中-低孔隙度、低渗透率储层类型为主。     

青岛市城中村土地征用(收)调查

随着全国大部分地区尤其是东部沿海区域城市化发展进入加速期,城区土地资源紧张问题愈发显现。同时城区内大片旧城区和城中村的改造,影响着城市化能否顺利实施,为了破解这一城市发展难题,青岛市国土部门创新思路,探索实施新的城中村土地征用(收)办法,全方位保障被拆迁群众的利益,推动了城市化的顺利实施,促进了社会的和谐和城市经济健康发展。     

Community participation in forest resource management in Nepal

Livelihood of the people in Nepal hills depends much upon forest resources in addition to farming as forest plays a critical role in the well being of the farming households where access to alternative sources, such as energy for cooking, nutrition for animals, materials for fertilizer and constructing materials for shelter, are limited. Thus, the well being of the people in the hills is directly affected by the management of these forest resources. This issue was addressed in this paper by examining the forest resource management practices and its effect on well being of rural people in two different stages in a village lying in the steep hill of Mahabharat Range in the southern hills of Kathmandu valley, Lalitpur District. The main ethnic/caste groups in the villageare Brahmin/Chhetri (high Hindu caste),Magar/Tamang (Tibeto Burmans) and Kami (occupational caste: cobbler). Currently there are four community forest users groups, with mixed ethnic membership, organized to manage the forest resources. The endowments, weak institutional settings, before 1990 helped the Bhramins, Magars and Tamangs to get access into the private forest endowment, which made them easy to get access to the forest resources, mainly fuel wood, fodder and timber in 1990 and enhanced their well beings. But the socially backward Kami could not get benefit from the institutions that existed during that time and had less chance to enhance their well beings. After the set up of different endowments during late 199os, i.e.,hand over of forest management to users groups in line with the concept of community forest,environment to use the forest resources became better for all the groups, along with the management of the forest. This enhanced the well beings of all the groups in the study village. However, the ability of Kami to use the forest resources to enhance their well beings was still lacking behind. The reason was partially due to the difference in endowments carried over from the endowments before 199o, and partly due to their occupational work and location of their settlements.     

RECENT DEVELOPMENTS IN DEBRIS FLOW RESEARCH IN ITALY

ＲＥＣＥＮＴＤＥＶＥＬＯＰＭＥＮＴＳＩＮＤＥＢＲＩＳＦＬＯＷＲＥＳＥＡＲＣＨＩＮＩＴＡＬＹＭａｒｃｈｉＬｏｒｅｎｚｏ；ＴｅｃｃａＰｉａＲ．（ＩｎｓｔｉｔｕｔｅｆｏｒＰｒｅｖｅｎｔｉｏｎｏｆＨｙｄｒｏｌｏｇｉｃａｌａｎｄＧｅｏｌｏｇｉｃａｌＨａｚａｒｄ...