山东沂水县常庄钛铁矿地质特征及成因探讨

沂水县常庄钛铁矿床产于中细粒含钛磁铁矿辉石角闪石岩中,该岩体既是成矿母岩又是赋矿围岩。矿体长1 800 m,平均宽75 m,控制斜深344 m,平均品位TiO28.85%,品位变化系数为104%,TFe+TiO2平均品位28.24%,品位变化系数为102%。属品位变化较不均匀的矿体。该矿床具有矿体规模大,形态简单,易于开采之特点。通过对矿床地质特征的研究,认为该矿床属基性岩浆分异型钛铁矿床,其成矿时代为古元古代。     

莒县天宝钛铁矿地质特征及矿床成因探讨

莒县棋山天宝钛铁矿是山东省发现并评价的第一个大型钛铁矿矿山,矿区位于沂沭断裂带汞丹山凸起的东部。矿体为褐黑色含钛磁铁角闪石岩,围岩为古元古代吕梁期傲徕山超单元条花峪单元弱片麻状中粗粒二长花岗岩。矿区已发现钛铁矿矿体2个,均呈NE向脉状产生。Ⅰ号矿体长1 600 m,地表平均宽180 m,控制延深204 m;Ⅱ号矿体长880 m,地表宽150~200 m,延深100 m以上。2矿体平均品位分别为TiO28.77%,8.33%;TFe18.47%,17.07%。两矿体合计矿石资源量为(331) (332) (333)10 461.6万t,TiO2资源量905.2万t。矿体规模大,易开采,钛、铁及其他有益元素可以综合利用。     

山东省沂水县天桥官庄钛铁矿矿床特征

天桥官庄钛铁矿属于岩浆结晶分异矿床,含矿岩石赋存于新太古代晚期红门序列三官寨单元角闪辉长岩中。矿区内共圈定钛铁矿矿体1个,矿体出露长约280 m,宽7~26 m。矿体赋存标高+190~0 m,控制埋深约190 m,最大真厚度42.69 m,最小真厚度4.64 m,平均真厚度14.99 m,属厚度较稳定的矿体。矿石m Fe含量7.05%~21.78%,平均品位13.33%;Ti O2含量2.48%~6.30%,平均品位4.33%;(m Fe+Ti O2)含量11.13%~28.05%,平均品位17.66%。角闪辉长岩在地表风化形成灰黑色土壤,与花岗岩风化形成的淡红色土壤有明显的区别,为其重要的找矿标志。     

山东省沂水县下儒林钛铁矿矿床地质特征

下儒林钛铁矿位于沂沭断裂带内汞丹山凸起的东部边缘,浮来山白粉子断裂的西侧。含矿岩石(矿化体)为侵入于新太古代泰山岩群中的新太古代晚期含钛磁铁矿角闪石岩,其呈透镜状或带状发育于泰山岩群中或被捕虏(残留)于古元古代吕梁期傲徕山弱片麻状中粗粒二长花岗岩内,其产状与新太古代变质地层基本一致。矿区内圈定矿体5个,矿体长240~1000m,宽14~140m。矿石TFe含量一般为15%~16%,最高为21.84%,矿床平均为15.55%;TiO2含量一般为5%~8%,最高为10.13%,矿床平均为6.54%。矿石中TiO2与TFe含量变化呈正相关关系。     

山东省平度—莱西地区透辉石矿矿床地质特征

平度—莱西地区透辉石矿成矿带西起平度长乐镇东至莱西市南墅镇,全长约50km,宽约5km,总体分布方向近EW向.矿体控制长度为510～1873.5m,厚度为45.72～67.59m,最大延伸约200m.矿石矿物透辉石含量一般为80％～98％.有害组分Fe2O3含量一般为0.22％～0.31％,MnO+TiO2含量一般为0...     

五莲坤山透辉岩矿地质特征

五莲县坤山透辉岩矿赋存于古元古代粉子山群张格庄组第三岩性段下部白云石大理岩层中,有水西何子和院上2个矿段,每个矿段由2个似层状矿体组成。矿体长154～264m,厚5.68～17.57m,矿体产状稳定。顶、底板围岩岩性均为白云石大理岩,2矿层间隔4～6m。透辉岩矿矿石特征与平度、莱西等地古元古代荆山群野头组赋存的透辉岩矿相似,矿石中化学成分变化稳定,Fe2O3含量普遍较低,矿石质量好,物化性能稳定,适于用做陶瓷原料。五莲县坤山透辉岩矿为严格受地层层位控制的变质沉积型矿床。     

陕西省旬阳县红花坪锌矿床地质地球化学特征及成因探讨

通过对陕西省旬阳县红花坪锌矿床的地质矿产勘查,已圈出I1锌矿体和一些单工程控制的规模较小的铅锌矿化体。已获得锌资源量7.43×104t;工程控制矿体长990m,斜深393m,矿体厚0.44～11.35m,平均厚2.65m,Zn含量0.96%～23.85%,平均6.14%;Pb含量0.01%～1.28%,平均0.13%。通过对红花坪锌矿床的矿体及矿物岩石特征、矿床地质地球化学特征、成矿年龄及成矿温度压力特征等进行了分析和讨论,认为该矿床为热液改造型矿床。     

沂水县南仉林钛、铁矿地质特征

沂水县杨庄南仉林钛、铁矿位于沂沭断裂带汞丹山凸起的东南部,矿体为含磁铁矿钛铁矿角闪石岩,围岩为新太古代晚期第三阶段弱片麻状中粗粒二长花岗岩。矿区圈定钛、铁矿体1个,呈脉状产出,较规则,总长度约1200m,宽25～67m,平均40.3m,延深大于200m。矿体平均品位TFe20.13%,Ti028.86%。属晚期岩浆分异型钛、铁矿床。     

青海省都兰县哈日却录铜矿地质特征及找矿前景

哈日却录铜矿区位于东昆仑南缘布青山构造混杂岩带,NWW向断裂构造发育,岩浆活动频繁,岩浆热液为成矿元素的活化、迁移、富集创造了条件。研究区划分出2个矿段8条铜矿体,其中Ⅰ-2号矿体是区内主要矿体,赋矿岩石为碎裂状玄武岩、粉砂岩,矿体呈似层状,铜含量0.21%～2.22%,平均品位0.84%,主要有黄铜矿化、黄铁矿化、孔雀石化,铜矿体主要赋存于马尔争组玄武岩夹薄层砂岩中,认为是下步找矿的主攻层位。     

沂源县下沟铁矿地质特征及找矿方向

下沟铁矿位于中朝准地台鲁西断隆东部边缘,沂沭断裂带西侧,为一中型鞍山式铁矿床。矿体赋存于泰山岩群雁翎关岩组变质岩系中,该组为一套基性超基性海底火山喷发沉积建造。矿体分布面积0.27km2,走向长225～1240m,最大控制斜深422m,TFe平均品位35.49%,品位变化均匀,矿体由多个带状矿层组成,后期岩体侵入分割成3个矿段。矿石自然类型为细粒条带状磁铁石英角闪岩型,矿石铁品位较高,具有较大的经济价值和科研价值。     

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.     

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。     

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.     

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...