高分辨率地层学的特点、应用范围及研究意义

着重对高分辨率地层学的主要特征进行阐述 ,高分辨率地层学的主要特色 ,就是提高对地质时限的划分 ,也即小于 1Ma地质时限的划分 ,与传统生物地层方法相比 ,其精度可提高数十倍 ,其研究对象主要是旋回层和事件层。高分辨率地层学应用广泛 ,不但能够极大提高划分和对比的精度 ,而且能够满足当代地层学、盆地深入研究的需要。     

中短期强震危险地点的跟踪预测

系统研究强震前活动及各种前兆空间上的演化特性，提出确定危险区，危险地段，危险地点的基本原则，顾及地质背景及前兆的时序特点，提出用累积危险度跟踪预测强震危险地点的方法，并在对唐山地震及大同地震的验证中收到预期的效果，累积危险度的高值葬，是未来强震发生的地点。     

北京南口山前断层活动性研究

系统分析了监测南口山前断层活动性的形变及重力复测资料。研究认为：断层各段的活动性存在明显差异，上口～南口段活动幅度小，南口～白羊城段为持续张性活动，活动速率较大，白羊城～马刨泉段呈现间断性的扭动或张性活动；强震发生前后，断层活动方式发生转折，表明强烈地震的孕育发展进程，影响着区域构造活动的特性；南口山前断层各段深部活动具有统一性，并存在剧烈的局部构造活动；应重视南口山前断层发生强烈地震的可能性．特别是南口～白羊城段     

地下水动态的超远强震异常问题

自２０世纪８０年代以来，在我国地震地下水动态观测网中陆续发现井水位在超远距离强震前的异常现象。这种异常表现为井水位的振荡与阶变，多出现在震前几小时至几天内，有一定的重现性。对这种异常的形成机制有多种不同观点，其中具有代表性的有强震的前驱波作用观点与强震孕育的林构造牵动观点等。     

板块结合带与边缘海的壳幔同位素演化

板内构造研究的许多新资料表明，板块常常是通过一个宽的结合带而拼合在一起。后者具有异常的壳幔结构，是地幔受到陆壳不同程度地混染所致，是一种弱亏损地幔，εNd（t）为负值或低正值，Isr轻度富集，富放射性Pb的地幔源。它形成于板块边缘，故称为边缘海。板块俯冲碰撞首先是通过边缘海进行，最终才是两个板块的碰撞，故在其间常保存一个因边缘海聚合而形成的板块结合带。     

America's Changing Farmscape: A Study of Agricultural Tourism in Michigan*

Agricultural tourism incorporates visits to farms for the purposes of on‐site retail purchases, enjoyment, and education. Long popular in the European Union (EU), agritourism is gaining popularity throughout the United States. Interest has grown as a result of stagnant grain prices, rising farm costs, and growing international competition. For rural areas seeking new economic options, the potential of these operations to generate new sources of income through sales and horizontal linkages to other tourism‐based activities has sparked interest beyond the farm gate. This article, based on a survey and a statistical analysis of 300 agritourism operations in Michigan, summarizes factors associated with successful operations.     

A new method for retrieving band 6 of aqua MODIS

The Moderate Resolution Imaging Spectroradiometer (MODIS) is a key research instrument for the NASA Earth Observing System (EOS) mission. It was successfully launched onboard the Terra satellite in December 1999 and Aqua satellite in May 2002. Both MODIS instruments have been working well except that 15 of the 20 detectors in Aqua MODIS band 6 (1.628-1.652 /spl mu/m) are either nonfunctional or noisy. The striping in Aqua MODIS band 6 caused by its nonfunctional or noisy detectors has been a serious problem for MODIS snow products, which use band 6 primarily for snow detection. MODIS scientists have been using Aqua MODIS band 7 (2.105-2.155 /spl mu/m) instead of band 6 for computing the normalized difference snow index to continue detecting global snow coverage. The main objective of this letter is to retrieve Aqua MODIS band 6 using other bands based on their relationships in Terra MODIS. The band retrieval approach proposed in this letter is also very useful for the next generation of MODIS sensor-the Visible/Infrared Imager/Radiometer Suite (VIIRS) band M10 proxy data generation. Such proxy data can support the VIIRS prelaunch end-to-end testing, postlaunch calibration/validation, and data quality checking.     

地壳流体与地震活动关系及其在强震预测中的意义

以地球科学发展的新近研究成果为基础,讨论了地壳中流体与强震活动的关系,包括上地壳热流体对强震活动的影响、中地壳流体对强震活动的控制、断裂带中古流体活动与地震活动旋回的关系,从而提出由地壳流体分布与活动特征来判定强震危险性的新途径     

Preliminary Discussion on the Implication of Determination of Source Depth of Earthquakes

In an earthquake catalog,the source depth of earthquakes is one of the most basic parameters; however it is also one of the most difficult to measure.The source depths in the PDE bulletin,the centroid depths from CMT inversion of USGS and Harvard University,and those obtained by depth phases of broadband waveform data are not equal to each other,and they are also have different meanings.Also,the depth obtained from broadband waveform modeling is another kind of depth of different a rupture "core." This paper preliminarily discusses the physical implication of the source depth of earthquakes with different measuring methods.     

张家口Ms4.2地震前的地下流体异常

１９９７年５月２５日张家口ＭＳ４．２地震是１９９７年上半年首都圈地区发生的显地震,虽然该地震震级不高,但地下流体的短临异常十分显。作主要介绍了该地震前地下水流体短临异常的特征高此得到的科学启示 。