桂东北大宁岩体锆石SHRIMP年代学和地球化学研究

大宁岩体位于扬子板块与华夏板块结合带,岩性组合为二长闪长岩-花岗闪长岩-二长花岗岩-钾长花岗岩.岩体中广泛存在壳幔混合包体.本文利用锆石sHRIMPU-Pb法,获得大宁岩体成岩年龄上限为(419.1±6.4)Ma(MSWD=1.03),属加里东晚期.岩体的地球化学研究显示,大宁岩体属弱过铝高钾钙碱性岩石,富大离子亲石元素和轻稀土,显Nb、Ba、Sr、Eu组合异常.岩石具有较高的I_(Sr)值(0.7112～0.7196),较低的εNd(t)值(-6.77～-7.53)和T_(DM)值(1.40～1.71Ga).结合邻区加里东花岗岩壳幔混合特征,本文认为,大宁岩体为幔源岩浆底侵诱发的下地壳变砂屑岩部分熔融形成,形成过程中有显著的幔源组分加入.     

北京顺义4.0级地震和震后首都圈地震趋势分析

１９９６年１２月１６日顺义Ｍｓ４．０地震，是北京地区近６ａ来最大的一次地震活动此次地震前，首都圈地区地震活动出现了近ＳＮ向弱震活动，１１月份地震活动是全的月频次最低的月份，这些异常现象之后发生了顺义地震。此次顺义地震属非前生震群活动。这次地震活动是顺义及其附近地区１９７０年以来地震活动余震最多的一次。这次地震后应注意今后几个月京西北、张家口附近发生Ｍｓ５．０左右地震的可能。     

区域经济政策的博弈解析

针对传统区域政策只基于目标区域利益考虑的缺陷,文章应用博弈分析的原理,分析区域分工的动力机制,以及区域政策对区域竞争和分工过程及结果的影响。主要结论是:利益是驱动分工的根本动力,如果参与分工能给区域带来利益增收,区域才会主动参与分工;分工产品的价格比是影响竞争和分工过程的主要因素,不合理的价格体系会影响或破坏合理的区域竞争和分工;单个区域所制定的政策最终将影响所有具有经济联系的相关区域。以中国“区域均衡增长”与“区域倾斜增长”两个主要区域政策的效果为例,进行了实证研究。     

九龙江口红树林区底栖动物体内的多环芳烃

2001年8月和11月在九龙江口红树林区采集了6种底栖动物,测定了它们体内16种多环芳烃的含量.紫游螺(Neritina [Dostia] violacea)、黑口滨螺(Littoraria melanostoma)、可口革囊星虫(Phascolosoma esculenta)、弹涂鱼(Periophthalmus cantonensis)、查加拟蟹守螺(Cerithideadj adjariensis)、孔虾虎鱼(Trypauchen vagina)对沉积物中多环芳烃的富集系数均小于1.弹涂鱼和黑口滨螺体内多环芳烃的含量有随沉积物中多环芳烃含量的增加而增加的趋势,但它们的富集系数却有随沉积物中多环芳烃含量增加而减少的趋势.弹涂鱼、黑口滨螺、查加拟蟹守螺和可口革囊星虫体内多环芳烃主要由二环多环芳烃组成,紫游螺和孔虾虎鱼体内分别是四环和五环多环芳烃比例最高.     

Development and application of the monent-ratio imaging algorithm

In the moment-ratio imaging algorithm, which is based on the theory of healing of a wound, the energy of each strong earthquake is distributed around the epicenter according to certain rules, and the features of the Moment-ratio value R are analyzed as the space and time change, so that the relationships between the moment-ration value R and strong earthquakes can be found. In the present paper, regions divided, hypocenter depths and events completed magnitude analyses were carried out in the Chinese catalogue. By applying the moment-ratio imaging algorithm in which the parameters are adjusted, the processes of anomaly evolution which correspond to the epicenter and the surrounding value R before earthquakes of M≥7.0 since 1966 in different areas of China were analyzed. It was found that the range area and imminent time of a coming earthquake could be confirmed quantita- tively by analyzing the abnormal temporal and spatial variation of the value R The results showed that the temporal and spatial variation of the value R could quantitatively reflect the temporal and spatial factors of a coming strong earthquake as well as the rule of medium rupture.     

对气象短信制作的思考

本文运用传播学和新闻学中的有效传播的基本原则,联系当前气象短信传播实际,将气象短信有效传播的基本原则归纳为科学实用原则、及时准确原则、新闻结构原则、通俗易懂原则、审美趣味原则;总结了工作中对提高气象短信编辑质量的几点体会,为气象短信的不断创新,增强对用户的吸引力提供有益参考。     

The stress release model and results from modelling features of some seismic regions in China

ＴｈｅｓｔｒｅｓｒｅｌｅａｓｅｍｏｄｅｌａｎｄｒｅｓｕｌｔｓｆｒｏｍｍｏｄｅｌｉｎｇｆｅａｔｕｒｅｓｏｆｓｏｍｅｓｅｉｓｍｉｃｒｅｇｉｏｎｓｉｎＣｈｉｎａＪＩＡＮＣＡＮＧＺＨＵＡＮＧ（庄建仓）ＬＩＭＡ（马丽）ＣｅｎｔｒｅｆｏｒＡｎａｌｙｓｉｓａｎ...     

非金属矿物在抗菌材料制备中的应用

介绍了几种非金属矿物(沸石、海泡石等)的结构特点,并简要阐述了以沸石、海泡石和累托石等为载体的金属离子型无机抗菌剂的制备方法及其对各种菌类的抑制情况;天然非金属矿物结构独特,价格低,资源广,作为抗菌剂载体具有很高的应用价值。     

生物农药的开发利用综述

化学农药的使用带来了致使人畜直接中毒、环境污染等许多问题。由于长期使用某些化学农药,使害虫产生了抗药性。针对化学农药的种种弊端,国内外已研制出一系列选择性强、效率高、成本低、不污染环境、对人畜无害的生物衣药。广义的生物农药包括微生物农药(细菌、真菌、病毒)以及生物工程植物两大类。当前生物农药的开发和使用仍处于起步阶段,但其发展前景十分美好。     

Argument on the magnitude-frequency relation

IntroductionSince the magnitude-frequency relation (1)being proposed and applied to the research of global seismicity by Gutenberg and Richter (1944, 1954), it has been widely used in the practice of seismic hazard prediction and of the research of seismic activity in different tectonic regions of the world ((1) is normally known as the G-R law).While with the increase of observational data of events, much researches show that though (1) can fit data well for events with middle value of magn…