山西昊兴塬煤矿瓦斯赋存规律研究

研究区位于山西著名的霍西煤田中西部区域,区域含煤地层出露稳定,潜在资源量巨大。研究表明:井田含煤地层主要为上石炭统太原组(C_3t)和下石炭统山西组(P_1s),可采煤层主要为9、10和11号煤层;煤田地质构造复杂程度属于简单型,褶皱、断层和陷落柱等对煤层影响较小;研究区的矿井瓦斯主要受煤层埋深与上覆基岩厚度的影响,而受其他因素影响不明显。     

郴州地区煤田地质特征及找煤远景区

本区地槽型煤田,主要是下寒武统牛蹄塘组,由一套浅海相碳质板岩为主组成的含钒石煤岩系,与下伏地层呈整合关系。地台型煤田有下石炭统测水煤系和上二叠统斗岭煤系,它们是以一套海陆交互相的细碎屑岩为主,夹菱铁矿或黄铁矿结核及煤组成,与下伏地层呈整合关系。其中斗岭煤系的煤层分布广,煤层及煤质较好,是本区找煤的对象。地洼型煤田,为上三叠—下侏罗统煤系,呈零星小块分布,是一套以陆相,杂色粗碎屑岩为主,夹泥岩及煤组成,与下伏地层呈不整合关系。主要发育在资兴市和宜章县一带,找煤条件次于斗岭煤系。     

坦桑尼亚 桑威—基畏那煤田煤层中的硬核体

桑威—基畏那煤田成煤时代属早二迭世。煤田基底为前寒武系变质岩系,其上为上石炭统依多西组,下二迭统姆丘丘玛组,上二迭统鲁呼呼组,以及白垩系、第三系、第四系地层。其中含煤地层为下二迭统下姆丘丘玛组,上煤段含煤二层（1、2号煤）,多不可采;下煤段含煤七层（3、4、5、6、7、8、9号煤）,其中3b、5、6号煤层全区发育,为主要可采煤层。煤层厚2-3米,夹矸多,多属复杂结构煤层,按中国煤的分类,属气煤和弱粘煤,煤的灰分高,硫分中等。主要煤层的厚度、结构及煤质特征见表1。      

安鹤煤田当中岗勘查区水文地质特征及充水因素分析

当中岗煤勘查区位于安鹤煤田东延部分,主要含煤层段为上石炭统太原组和下二叠统山西组,主采煤层二1、一煤层厚度稳定,但埋深较大,前期地质研究程度低。利用钻探、物探及邻区资料收集等综合研究手段,取得了矿产勘查成果,对该区的水文地质特征及充水因素研究、后续勘查提供了有力的地质依据,也对周缘矿井的矿层充水分析、突水灾害防治具有指导性意义。     

渭北澄郃、蒲白矿区太原群岩相古地理及含煤特征分析

渭北石炭二迭纪煤田,位于祁吕贺兰山字型构造的前弧东翼内侧与新华夏系第三巨型沉降带中段——陕甘宁盆地南缘的复合部位,南邻秦岭纬向构造带。澄合、蒲白矿区则位于渭北煤田的中段。区内含煤地层为上石炭统太原群及下二迭统山西组,可采煤层主要含于太原群。太原群为一套海陆交互相含煤沉积,直接覆盖于下、中奥陶统灰岩之上。其岩性主要为灰、深灰、灰黑色泥岩、砂质泥岩及粉砂岩,其次为浅灰、灰白色石英砂岩,夹黑灰、深灰     

朔南矿区9~#煤层煤质特征及液化性能

朔南矿区位于山西省宁武煤田北端,主要可采煤层为上石炭统太原组9~#煤层。在统计分析朔南矿区以往勘查资料的基础上,系统分析了研究区9~#煤层的物理性质、煤岩特征、煤质特征及其变化规律,初步评价了朔南矿区煤炭的液化性能。结果表明:朔南矿区9~#煤层以中-中高硫、中-中高灰、高挥发份,高发热量的长焰煤为主,9~#煤层洗选后可作为直接液化用煤。     

FM-2型取心器使用效果

我队煤田地质钻探工作程度属于远景普查综合找矿。该区含煤地层为下二叠统山西组和上石炭统太原组。总厚度约120—180米，含煤18层。     

稳定同位素在研究太原西山煤田中的应用

太原西山系我国北方石炭二叠纪含煤地层的标准剖面所在地,区内广泛发育着一套典型的海陆交互相含煤岩系,自下而上为中石炭统本溪组,上石炭统太原组和下二叠统山西组,总厚度约180m。煤层主要集中在太原组和山西组,共有18层,可采和局部可采约8~9层。含煤地层中岩石主要以碎屑岩为主,泥岩和灰岩次之。      

内蒙准格尔旗东部太原组、山西组植物群特征

一、前言 本文涉及地区位于内蒙准格尔旗东部黄河以西,即所谓“准旗煤田”。区内大部分为黄土覆盖,但在沟谷中地层出露尚佳。本区最老地层为下、中奥陶统。中石炭统本溪组平行不整合覆盖其上,向上依次为上石炭统太原组、下二叠统山西组及下石盒子组、上二叠统上石盒子组和石干峰组,下三叠统刘家沟组及和尚沟组;下白垩统志丹群及其以后的地层则不整合于前述地层之上。     

地球物理测井在沁水煤田勘探中的应用

文章通过对山西沁水煤田二叠系下统山西组及石炭系上统太原组煤系地层的测井实践,明确了煤层及其围岩的地球物理特征,确定了煤田测井的技术条件和定性、定深、定厚的地球物理参数。     

CSAMT 法在辽西康杖子区深部探矿中的应用

可控源音频大地电磁法(CSAMT)具有探测深度大、横向分辨率高、抗干扰能力强的特点,在深部找矿勘探中有着重要的指导意义。肖家营子铜钼矿床是辽西地区一个大型矽卡岩型金属矿床,大部分矿体是隐伏矿体,矿区外围的康杖子区与本区有相似的成矿地质环境,成矿地质条件优越.矿体与围岩电性差异明显,通过应用CSAMT,矿体具有低电阻特点,根据成果推断解释,对深部有利成矿部位进行了钻探验证,取得了理想的探矿效果,在矿区外围取得第二深度空间找矿重大突破。     

Recent advances in aquaculture in Japan

Conclusions During the last ten years, aquaculture, especially mariculture has undergone remarkable expansion to counter-balance the gap between the supply and demand of fishery products in Japan. Its expansion has also been supported by the traditional preference of the Japanese people for seafood. Mariculture is now being forced to change its structure due to adverse economic circumstances such as the rise in the cost of energy, feeds and other materials for culture, low market prices, deterioration of environmental conditions, and many other factors. Before these constraints can be resolved, advanced scientific knowledge and technologies must be integrated to develop new types of aquaculture. Expansion of maricultural activities to more open-sea and off shore areas would be one route to follow. Technologies for the development of formulated diets not only for young but also for adults and larvae, establishment of feeding standards, prevention of epizootic diseases must support the establishment of modern aquaculture.The culture-based fisheries, or marine ranching, is becoming a subject for further development in Japan. Much research work has been conducted with a great degree of governmental support. Establishment of a net work of seedstock production farms has made it possible to carry out releasing experiments on a large scale. A newly integrated restoration system could be developed on the basis of these experiments, even though the profits resulting from the artificial restoration of stocks is not thouroughly verified at present. The commencement of a national scheme for culture-based fisheries would be a manifestation of the enthusiasm of the Japanese fish industry.     

花岗岩地区地下水水文地质特征分析

通过对泰安市岱岳区花岗岩地区地下水的形成条件、地下水类型、分布状况、水文地质特征以及地下水补给、径流、排泄条件的分析,指出了花岗岩地区供水方向。     

Geography in general education in Nigeria

This paper traces the development of geographic education in Nigeria and examines the views of geographers, other academics, students and the public at large about the importance of geography. Geography's value is immense despite the non-professional nature of the discipline. Nevertheless, there is a need to define geography's status and ensure career prospects for students. The Nigerian Geographical Association (from classroom teaachers to top geographers) must promote geography, improve its status in schools and universities, and continuously restructure its content and methods to address pertinent social needs.     

Trends in landslide occurrence in Nepal

Nepal is a mountainous, less developed kingdom that straddles the boundary between the Indian and Himalayan tectonic plates. In Nepal, landslides represent a major constraint on development, causing high levels of economic loss and substantial numbers of fatalities each year. There is a general consensus that the impacts of landslides in countries such as Nepal are increasing with time, but until now there has been little or no quantitative data to support this view, or to explain the causes of the increases. In this paper, a database of landslide fatalities in Nepal has been compiled and analysed for the period 1978–2005. The database suggests that there is a high level of variability in the occurrence of landslides from year to year, but that the overall trend is upward. Analyses of the trends in the data suggest that there is a cyclicity in the occurrence of landslide fatalities that strongly mirrors the cyclicity observed in the SW (summer) monsoon in South Asia. Perhaps surprisingly the relationship is inverse, but this is explained through an inverse relationship between monsoon strength and the amount of precipitation in the Hill District areas of Nepal. It is also clear that in recent years the number of fatalities has increased dramatically over and above the effects of the monsoon cycle. Three explanations are explored for this: land-use change, the effects of the ongoing civil war in Nepal, and road building. It is concluded that a major component of the generally upward trend in landslide impact probably results from the rural road-building programme, and its attendant changes to physical and natural systems.     

2010年的美国铀矿业

2010年,美国铀矿总共施工7 209个钻孔,总进尺1 493 520 m;生产铀1 628.55 t;铀矿业总支出费用为2.773亿美元,其中铀矿地勘费支出为3 450万美元,占铀矿业总费用的12.44%。铀矿地勘钻探费用为4 460万美元,占铀矿业总费用的16.08%。     

地下水环境中的硫代砷研究进展

硫代砷是富硫化物地下水中砷的重要形态,对环境和人类健康有潜在威胁。目前硫代砷研究程度尚低,本次主要针对国内外地下水（地热水）中硫代砷的存在形态,水文—生物—环境地球化学过程,样品保存,定量检测方法等方面进行研究。结论如下:pH, 氧化还原电位,硫化物含量和微生物作用等是影响地下水中硫代砷稳定存在和形态分布的重要因素。含铁矿物能与水中的硫代砷形成配位键对其进行吸附,吸附性普遍弱于（亚）砷酸盐,因此,地下水中硫代砷可能表现出更强的迁移性。用于硫代砷检测的自然水样在采集中可采取过滤,速冻,厌氧和低温短期保存的操作流程,以减缓该形态的转化甚至消失。色谱联用ICP-MS系统可用于自然水样中硫代砷的分离定量检测,紫外—可见分光光度法和X射线吸收光谱法在不同场景下也可对硫代砷进行定量和表征分析。地热水和浅层地下水中均可能存在硫代砷,由于水样中硫代砷的不稳定性,室内检测和分析难以准确反映现场过程,因此,野外样品保存技术和现场检测方法的更新可能在未来有更大研究空间,值得进一步探索。     

MapSUV系统在惠民县土地勘测定界中的应用

该文介绍了土地勘测定界的专业背景知识及MapSUV的相关信息,阐述了MapSUV系统在惠民县土地勘测定界的应用,以及外业获取数据及内业处理的主要工作方法,最后对该系统在土地勘测定界中的应用前景进行了展望。     

环境地球化学研究近十年若干新进展

环境地球化学学科在中国生态文明和美丽中国建设、国际环境公约履约及过去全球变化研究中发挥着越来越大的作用.本文简要回顾了中国过去十年在环境地球化学领域的部分研究进展,介绍了汞、持久性有机污染物和其他重金属污染物长距离传输研究进展;总结了汞、镉、锑、铊等非传统稳定同位素在地表生物地球化学循环过程中的同位素分馏规律及污染来源...