Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources   总被引：4，自引：0，他引：4  

Yoshihiro Tsuji    Hisashi Ishida    Masaru Nakamizu    Ryo Matsumoto  Satoshi Shimizu 《Resource Geology》2004,54(1):3-10

Abstract. Bottom-simulating reflectors suggestive of the presence of methane hydrates are widely distributed below the ocean floor around Japan. In late 1999, drilling of the MITI Nankai Trough wells was conducted to explore this potential methane hydrate resource and a Tertiary conventional structure. The wells are located in the Northwest Pacific Ocean off Central Japan at a water depth of 945 m. A total of six wells were drilled, including the main well, two pilot wells, and three post survey wells at intervals of 10–100 m. All wells except the first confirmed the occurrence of hydrates based on logging-while-drilling, wire-line logging and/or coring using a pressure and temperature coring system in addition to conventional methods. Based on the various well profiles, four methane hydrate-bearing sand-rich intervals in turbidite fan deposits were recognized. Methane hydrates fill the pore spaces in these deposits, reaching saturation of up to 80 % in some layers. The methane hydrate-bearing turbiditic sand layers are less than 1 m thick, with a total thickness of 12–14 m. The bottom depth of high hydrate concentration correlates well with the depth of the bottom-simulating reflector. Based on these exploration results, the Japanese government inaugurated a 16-year methane hydrate exploitation program in 2001.  相似文献   

特种遗产资源研究基本问题--中国世界遗产与国家公园研究形势与任务   总被引：5，自引：3，他引：5  

陈富斌  赵永涛 《山地学报》2004,22(1):1-6

特种遗产是本文对世界遗产与国家公园认定、保护、保存、展示和遗传后代的科学研究所作的理论概括,同时界定了特种遗产与特种遗产资源的概念,讨论了中国的特种遗产———世界遗产与国家公园研究形势,提出了特种遗产资源研究的8个基本问题。  相似文献   

旅游资源开发灰色模式识别及适宜性分析--以涞源风景区为例   总被引：3，自引：0，他引：3  

李加林  王亚欣  邓俊国  王占利 《世界地理研究》2004,13(2):90-95,82

分析旅游资源适宜采用何种开发模式是旅游规划中的重要基础工作。基于灰色系统数学理论，本文构建了一种模式识别方法，应用于旅游资源的适宜性分析及开发模式研究，文中阐述了具体的方法及计算公式，并以河北涞源景区为对象进行了验证。  相似文献   

利用盐湖卤水制取氢氧化镁的技术探索   总被引：10，自引：1，他引：10       下载免费PDF全文

刘玉胜  刘翠  马培华 《盐湖研究》2004,12(2):51-55

我国盐湖中蕴藏有丰富的有色金属资源，在开发过程中．对镁资源的利用不够．造成资源浪费。探索生产氢氧化镁产品的可行性工艺．合理开发盐湖镁资源．实现盐湖资源的综合利用，具有重大的意义。  相似文献   

Integrating Natural Resource Management for Better Environmental Outcomes     

T. H. MORRISON  G. T. McDONALD  MARCUS B. LANE 《The Australian geographer》2004,35(3):243-258

Severe problems of fragmented policies and uncoordinated implementation undermine natural resource management in Australia. There have been promising signs of progress through activities such as the National Forest Policy, Council of Australian Government water reforms, National Land and Water Resources Audit, the Murray‐Darling Basin initiative and the National Action Plan for Salinity and Water Quality to integrate resource policies. There have also been some notable successes at State and local level. But fragmentation endures. This paper provides evidence of the enduring problem of fragmentation and presents a framework to analyse Australia's experience in natural resource management. The analysis reveals the multi‐dimensional character of the problems and identifies a diverse set of actions that need to be taken to improve integration in policy and implementation. Particular attention is given to the potential for regional programs to contribute to improved integration and NRM.  相似文献   

The cultural context of forest degradation in adjacent Purépechan communities, Michoacán, Mexico     

Martha A Works  Keith S Hadley 《The Geographical journal》2004,170(1):22-38

Recent changes in the cultural and forest landscapes of the Meseta Purépecha in Michoacán, Mexico as a result of forest degradation underscore the complexity of forest change processes in the tropical highlands of Latin America. Differences in community perception and forest structure and composition between the furniture-making and lumber-producing towns of Pichátaro and Sevina, Purépechan indigenous communities located amidst pine forests on Michoacán's volcanic plateau illustrate the dynamics of this process. We base our comparisons on interviews and field measures of forest structure. Our results show dramatic changes in the forests and cultural landscapes of both communities during the past decade. Following high regional timber exports during the early 1990s, Sevina shifted from a self-sufficient to a timber importation community. By comparison, communal forests and individual parcels in Pichátaro continue to provide wood for approximately 300 wood shops. Field data and forest stand maps confirm the perception of forest degradation in both communities. While Pichátaro has maintained a larger and more diverse forest base to date, stand structure data indicate selective harvesting has led to a shift in dominance toward the less economically desirable pine species and oak. Deforestation and degradation of Sevina and Pichátaro's community forests are symptomatic of both the Meseta Purépecha and Mexico in general. Current forest conditions in both communities justify local, regional, and national concerns regarding declining biodiversity and sustainable economies.  相似文献   

非金属矿产开发中存在的问题及对策   总被引：1，自引：0，他引：1  

王吉中  李赋平  孙永华  孙惠芳 《矿产与地质》2004,18(6):591-593

阐述了我国非金属矿产开发过程中存在的体制、产品结构、深加工技术及矿山环境等问题，并进行了相关的讨论。在此基础上，从可持续发展的角度出发，提出了我国21世纪非金属矿开发的对策。  相似文献   

保护煤炭资源 建设小康社会   总被引：1，自引：0，他引：1  

刘连翠 《中国煤田地质》2004,16(4):60-62

煤炭是我国主要能源。无论过去、现在、还是未来，煤炭在我国能源市场的重要地位都不可动摇。煤炭资源安全牵系着国家能源战略安全，直接影响到国民经济的可持续发展。新世纪，在全球性能源危机面前，中国实行全面的节能增效与减灾政策，是保障国家能源安全的必然选择。影响煤炭资源安全的因素，存在于煤炭工业的各个环节，对资源的科学管理，是减灾保煤，降耗增效的关键。  相似文献   

浅析GIS在岩溶地区公路建设土地利用中的应用     

鲁光银  朱自强  邹声杰 《物探化探计算技术》2004,26(2):165-168

在岩溶地区公路建设中，受复杂地形地貌的影响，将不可避免地产生占用耕地、破坏植被等环境问题，使得岩溶地区本来就脆弱的生态环境日趋恶化。因此，合理利用土地资源，维护生态平衡，将成为岩溶地区公路建设必须考虑的重要议题。在文中结合岩溶地区公路建设的实际情况，利用先进的GIS技术，针对公路建设的不同阶段，分别提出了各种不同的技术手段和工程措施，既指导了岩溶地区的公路建设．也保护了有限的土地资源。  相似文献   

Combination of drainage, water supply and environmental protection as well as rational distribution of water resource in Zhengzhou mining district     

WU Qiang  LI Duo    DI Zhiqiang  MIAO Ying  ZHAO Suqi & GUO Qiwen . Resource Exploitation Engineering College  CUMT  Beijing  China  . Shijiazhuang Engineering College  University of Economics  Shijiazhuang  China  . Shenyang Institute of Geology  Mineral Resources  Shenyang  China  . State Adminstration of Coal Mine Safety  Beijing  China  . Zhengzhou Coal Mine Company 《中国科学D辑(英文版)》2005,48(10)

It is forecasted that before the 2050s, coal would still make up 50%-60% of once energy constitution in China, but unfortunately, in most part of our coal districts and peripheral regions, we generally face the contradiction and conflict among the threat of water hazard, shortage of water resource and environmental protection, which are becoming more and more serious especially with a gradual increase in mining depth of the shaft and recovery of lower coal beds. The concrete expression is as f…  相似文献