论小型建材矿产的矿业权制度改革

为适应社会主义市场经济条件下市场配置资源的要求,国家实行了矿产资源有偿使用制度改革,县(市)国土资源管理部门对权限范围内矿产资源的开采一律要按照程序通过招标、拍卖或挂牌的方式出让采矿权。笔者认为相较其他矿产来说,小型建材矿产应首先进行矿业权制度改革,取消行政审批,进入矿业权市场,实行有偿使用。1 小型建材矿产矿业权制度改革的必要性1.1 小型建材矿产现状是进行矿业权制度改革主要原因建材矿产是最早被人们发现和利用的矿种,从早期的陶器、石器到现在的玻璃、水泥,建材矿产开发和程度和范围远远正超过了其他矿种,成为经济建…     

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Characteristics and generation mechanisms of key infrared radiation signals during damage evolution in sandstone

Acta Geotechnica - Infrared radiation count (IRC) is considered as an indicator for damage evolution of rocks. This new indicator links damage intensity and corresponding infrared radiation...     

华夏植物地理区一个新的亚区——豫淮亚区

本文在自己工作的基础上,结合前人资料,提出了华夏植物地理区一个新的亚区——豫淮亚区,用以概括具有重要特色之位于两淮、徐州、豫西一带的二叠纪植物群区系特征.文中着力刻划了该区具有浓郁地方色彩,极高的属种分异度,保存甚佳之植物群轮廓;划分了三个植物组合,即P|Callipteridium koraiense-Cathaysiopteris whitei-Cordaites schenki组合,P_1~2 Fascipteris spp.-Lobatannularia ensifolia-Gigantonocleaspp.组合,P_1~2 Gigantopteris nicotianaefolia-Lobatannularia multifolia-Psygmorphyllummultipartitum组合.文章还结合二叠纪该区独特的区域构造、古地理、古气候等方面,从不同侧面详塑了豫淮亚区的整体格架.     

秦皇岛市青龙县城工程场地动力特征及分区评价

工程场地动力分区评价（即地震影响小区划），是在工程场地地震危险性分析的基础上，根据场地岩土动力特征及地形地貌、地质构造条件等对地震动影响的反应程度，从而对不同类型场地的地震效应作出评价．其成果可做为建筑抗震设计、工程加固、震害预测与对策的制定及土地合理利用和总体规划布局的依据．本文以秦皇岛市青龙县城工程场地为例，进行了工程场地动力特征研究与分区评价及震害预测（即工程场地地震影响小区划）。     

Trends of urban air pollution in Zhengzhou City in 1996–2008

Urban air pollution is a commonly concerned environmental problem in the world.Identification of air quality trend using long-term monitoring data is helpful to understand the effectiveness of pollution control strategies.This study,using data from six monitoring stations in Zhengzhou City,analyzed the changing trend in concentrations of SO 2,NO x /NO 2 and TSP/PM 10 in 1996-2008,based on non-parametric Mann-Kendall test and Sen’s slope estimator,and evaluated the comprehensive air pollution level using Multi-Pollutant Index(MPI).It was found that the concentration of each pollutant exceeded obviously the World Health Organization(WHO) guideline value,but the changing trend varied:SO 2 and NO 2 were significantly increased mainly due to an increase in coal consumption and vehicle number,while NO x,TSP and PM 10 decreased.The air pollution was serious,and differed markedly among the three functional regions:it is the most severe in the Industrial and Residential Area(IRA),followed by the Transportation Hub and Business District(THBD),and then the High-tech,Cultural and Educational Area(HCEA).Different from NO 2 concentration that had a similar change trend/rate among the function regions,the change rate of PM 10 concentration differed spatially,decreased much more obviously in THBD than other two regions.For the whole city,the comprehensive air pollution level declined gradually,illustrating that the air quality in Zhengzhou was improved in the last decade.     

一个近地层中的三维随机扩散模式

利用横向Lagrange时间尺度T_(LY),与稳定度及高度的关系,本文建立了一个三维随机扩散模式,并用它模拟了近地层中地面源的扩散过程。模式计算结果表明:在稳定层结条件下该模式比取T_(LY)为常数得到的模式有明显的改进,而在不稳定条件下这一模式改进不大。     

松辽盆地白垩纪湖侵沉积层序与湖海沟通事件的地球化学记录

松辽白垩纪近海陆相盆地最大湖侵期的泉头组一嫩江组时期,可能发生了三次较大规模的海水入侵事件,时间分别为泉三、四段一青一段(阿尔布期),青二、三段顶部(土仑期)和嫩一、二段(晚桑托一早坎佩尼期)。海水注入使湖盆的水文地球化学和环境地球化学条件均发生改变,并在层序中留下沉积记录。海进期主要表现为:①重同位素组份增加,直至与同期海相层序的同位素组成相同;②介质的盐度指标(Sr/Ba)、碱度指标(Ca+Mg)/(Si+Al)、还原性指标(Zn+Ni)/Ga和硫通量指标(S归-化含量)均系统增加。相反,海退期则上述指标显著降低。根据沉积层序的同位素组成、同期海水的同位素组成和同位素分馏的质量平衡关系,可求出研究层段内同位素的海水来源与淡水来源的比例(混合度)为0-5。并由此恢复出海平面升降曲线。     

地壳流体与地幔流体间的关系

通过铀、金矿床及地幔岩捕虏体研究，初步得出以下认识：（１）在热液作用中岩浆分异热液是不存在的；（２）碱交代作用是整个地幔交代作用和地壳交代作用的基本运作机制，现已构成有几十条具体规律的理论系统；碱交代岩是地幔流体转变为热液的化石记录；（３）拆离断层构造体系是地幔流体上升到地壳后的活动通道；（４）磷（Ｐ）是地幔流体的特征性示踪成分；（５）大洋缺氧事件、生物种属灭绝、厄尔尼诺等有共同的地幔流体致因；（６）天然气－油－盐－金属成矿是统一的热液成矿作用。软流体是今后区域成矿预测的重要新依据。软流体的顶部发育有次级、再次级的局部上凸部，这是矿带、矿田群的重要成矿控制因素和找矿新标志。     

Ecological function regionalization of cultural heritage sites in Turpan,China, based on GIS

The protection for historical and cultural heritage and their surrounding environments is much more important than any other preventive efforts made by humans, so how to protect them and achieve sustainable utilization should be a priority. Regionalization is an efficient and a sustainable tool to manage the protected areas. In this study, based on regionalization of natural protected areas theory, we used ecological sensitivity analysis to regionalize the heritage sites in Turpan, China. Factors for the analysis are topography, ecological environments, human activity, and landscape resources. Based on the analysis of environmental status and spatial variation of ecological sensitivity in Turpan, this paper aims at developing a regionalization scheme and provides a scientific basis for protection and restoration of vulnerable historical and cultural sites. Our study results showed that 75% of the heritage sites in Turpan have sensitivity which is under dangerous condition and requires better planning and protection. This study provided a reliable and scientific way to regionalize heritage sites in the study area and which also can be transferred to other locations with similar situation.