国外煤层气地质评价和选区

美国的煤层气勘探和开发热潮持续了十几年的时间，先后在十几个含煤盆地进行了煤层气的研究和生产试验。结果表明，仅西部的圣胡安全盆地和东部的黑勇士盆地成绩斐然，其它含煤佃地目前只是边革层气区，即使是在圣胡安和黑勇士盆地内，煤层气产量分布也是不均匀的，圣胡安盆地７５％的煤层气产量来自盆地的北部的一个面积约７８０ｋｍ＾２的高产区黑勇士盆地人有煤层气田１８个，而８０％的产量来自５个高产气田，由此可见，搞好综合     

上海天文台激光测距站的时频系统

本叙述了上海天台人卫激光测距站的时频系统。随着测距精度的提高，时频系统也要不断地加以改进，包括频率标准和时间同步技术。     

Geochemical survey of thermal system in Northeast China and their geothermometric characters

The chemical composition of several thermal springs around Changbaishan area has been investigated. Cenozoic basaltic rocks are widely distributed in Northeast China and geothermal characteristics have been described. About one hundred hot springs exist around Changhaishan Volcano at the border between China and D.P.R.Korea with high temperature about 82~C. The pH values of the spring water range from 6.9 to 7.1 and the total flow rate is about 4.8 L/sec. The chemical composition of the thermal springs is sodium carbonate; the high-mineral contents of thermal water are believed to have medicinal properties. Bathhouses are already built along the hot springs to take the advantage of the supposed healing properties. The high quality of those hot springs is believed to be utilitized for mineral water. The chemical equilibrium temperatures were estimated at about 160℃ based on the Na-K-Ca geochemical thermometer.     

Mineral Resources of Chinese Altay and Tianshan： Metallogeny and Related Tectonic Processesm—A field workshop of IGCP-473

A workshop of the IGCP-473 was held in Xinjiang, northwestern China, from August 9-21. It was attended by more than 70 scientists, including 29 from outside of China, i.eUnited States, Canada, Australia, Japan,Russia, United Kingdom, South Africa,Mongolia, Kyrgyzstan, and Khazakstan. The workshop was superbly organized by a team led by Prof. Mao Jingwen of Institute of     

隧道工程地质评价的内容和方法

结合工程隧道实际,首先阐述了隧道工程的基本地质环境和工程地质条件,然后针对隧道工程可能出现的不良地质现象和可采取的工程措施,从大气降水、围岩稳定、围岩压力、洞口稳定、隧道比选等角度探讨隧道工程地质评价的主要方法和一般内容,进行隧道工程地质评价,为隧道施工、支护提供了依据.     

MATLAB在运用系统建模处理南海气象数据过程中应用

介绍了MATLAB语言特点和系统建模方法的基本理论.根据南海气象数据的实际建模处理过程,给出了建模的详细步骤及其MATLAB实现过程以及MATLABTM的主要实现程序.试验讨论和结果表明利用MATLAB语言可以方便地对南海气象数据用系统建模方法进行建模和处理,MATLAB在运用系统建模法处理南海气象数据方面具有明显的优越性.     

玛多黄河源区生态环境治理:任重道远

黄河,发源于青藏高原巴颜喀拉山北麓。玛多县境是黄河源区的主要片区,这里因处于三江源区青藏高原腹地及其特殊的地理位置和高寒多风干旱的气候,生态环境十分脆弱。近20年来,由于大气环境的逐渐变暖和人类活动的加剧如草原开发和过牧等因素,玛多县境内黄河河段、湖泊、湿地及草     

济宁市嘉祥县石灰岩矿山地质环境评价与治理

在对嘉祥县石灰岩矿进行地质灾害危险性评估、矿山环境地质问题评价的基础上,建立了一套评价体系,其中地质灾害危险性评估分为2个评价指标,矿山环境地质问题评价分为2种要素3个指标,同时将矿山恢复治理难易程度也作为一个评价因子。评价过程中对各指标危害性大、中、小程度均单独赋值,然后将各指标的分值进行叠加,确定出矿山环境地质问题的等级,将概划出的13个评价单元分为极差、差、一般3个区。提出了强化矿山管理、植树造林、科学避让、修建拦水坝等保护与治理措施及建议。