2010年“7·25”云南强降雨物理量特征分析

2010年7月25日,云南省产生了一次大雨、暴雨天气过程,通过对天气影响系统以及动力、热力、水汽条件等物理量特征分析表明,热带低压倒槽引导700 hPa上的辐合切变西移,加上低涡的配合,是此次强降雨过程的关键影响系统,加之高层到低层的负速度中心向左倾斜的趋势与中低层的热带低压倒槽、辐合切变走向一致,低层正涡度并有较强的水汽辐合,高层负涡度,并有较强的水汽辐散,从北部湾至云南省存在较丰富的水汽输送,强降水开始前,k指数在不断增大,垂直上升运动强烈,有较强的不稳定能量堆积,有利于对流活动的发生和发展,极易产生大雨、暴雨天气。     

城市景观建设与管理探讨

我国快速城市化进程中普遍存在城市景观特色丧失、千城一面等城市建设规划与管理症结.随着经济发展,城市风貌与景观特色已广受关注.针对城市景观乱象,在总结国内外城市景观研究与应用的基础上,提出了开展城市景观调查、加强城市生态基础设施保护、重视乡土植物景观保护与利用以及加强环境经济与公共政策研究等思路,探讨了构建符合生态环境保护与可持续发展时代精神、结合城市自然环境特征、切合社会经济发展与居民文化生活状况的城市景观评价与控制体系,指出通过坚持城市景观特色的继承与发展进行有效地城市景观规划建设与管理的途径与方法.     

“钦州残余地槽”回返时期的思考

“钦州残余地槽”一直被认为是东吴运动褶皱回返的，本文通过沉积相古地理、古生物特征及地质构造特征的分析对比，提出钦州残余地槽在早泥盆世中晚期封闭，仍属华南加里东褶皱系范畴     

浙西石耳山超单元花岗岩演化特征及成因浅析

本文介绍近年来在浙西石耳山花岗岩区引进“花岗岩超单元─单元”理论进行的1：5万区域地质调查工作取得的成果。按同源岩浆演化序列的观点，通过野外工作和室内研究，解体了晋宁期石耳山复式花岗岩体。对划分出的30个侵入体，归并建立了四个单元，并进一步建立了石耳山超单元。通过对石耳山超单元花岗岩的岩石矿物学、岩石化学、地球化学等地质特征的分析研究，初步总结其演化特征，并同时探讨其成因类型，指出石耳山超单元花岗岩相当于S型花岗岩，应属上地壳硅铝层重熔岩浆的产物。     

The North Taymyr ice-marginal zone, Arctic Siberia—a preliminary overview and dating

The North Taymyr ice-marginal zone (NTZ) is a complex of glacial, glaciofluvial and glaciolacustrine deposits, laid down on the northwestern Taymyr Peninsula in northernmost Siberia, along the front of ice sheets primarily originating on the Kara Sea shelf. It was originally recognised from satellite radar images by Russian scientists; however, before the present study, it had not been investigated in any detail. The ice sheets have mainly inundated Taymyr from the northwest, and the NTZ can be followed for 700–750 km between 75°N and 77°N, mostly 80–100 km inland from the present Kara Sea coast.The ice-marginal zone is best developed in its central parts, ca. 100 km on each side of the Lower Taymyr River, and has there been studied by us in four areas. In two of these, the ice sheet ended on land, whereas in the two others, it mainly terminated into ice-dammed lakes. The base of the NTZ is a series of up to 100-m-high and 2-km-wide ridges, usually consisting of redeposited marine silts. These ridges are still to a large extent ice-cored; however, the present active layer rarely penetrates to the ice surface. Upon these main ridges, smaller ridges of till and glaciofluvial material are superimposed. Related to these are deltas corresponding to two generations of ice-dammed lakes, with shore levels at 120–140 m and ca. 80 m a.s.l. These glacial lakes drained southwards, opposite to the present-day pattern, via the Taymyr River valley into the Taymyr Lake basin and, from there, most probably westwards to the southern Kara Sea shelf.The basal parts of the NTZ have not been dated; however, OSL dates of glaciolacustrine deltas indicate an Early–Middle Weichselian age for at least the superimposed ridges. The youngest parts of the NTZ are derived from a thin ice sheet (less than 300 m thick near the present coast) inundating the lowlands adjacent to the lower reaches of the Taymyr River. The glacial ice from this youngest advance is buried under only ca. 0.5 m of melt-out till and is exposed by hundreds of shallow slides. This final glaciation is predated by glacially redeposited marine shells aged ca. 20,000 BP (¹⁴C) and postdated by terrestrial plant material from ca. 11,775 and 9500 BP (¹⁴C)–giving it a last global glacial maximum (LGM; Late Weichselian) age.     

镇安二台子金矿控矿规律研究与盲矿体预测

在总结二台子金矿成矿规律的基础上,采用信息量和特征分析方法对矿区及外围进行了综合预测.之后,运用地球化学与构造应力分析相结合方法,对已知矿体进行了深部预测并定位.     

小视场CCD图像的几何定标

针对长焦距望远镜CCD观测天然卫星的情况,导出了用两颗亮星作为定标时,CCD视场几何参数(比例尺和指向)测量的误差公式,进而设计了多定标星定标时正确的归算方案。新方案不仅对天然卫星的位置测量,也对同类型的小视场CCD位置测量具有指导意义。     

富阳东坞山银多金属矿床地质特征及成因探讨

东坞山银多金属矿床产于区域性大断裂的复合部位，主要围岩为一套成因、成份十分复杂的角砾岩，次火山岩和碎裂砂岩，容矿构造为近东西向断裂的次级断裂挤压带。矿体呈脉状，规模中等，主要有益元素为铅、锌、银、铜，具明显垂向分带现象。成因类型属次火山岩型中温热液银多金属矿床。     

虚拟地理环境视景研究

叙述了如何生成基于真实地形数据的、具有逼真地球表面文化特征和自然景象的虚拟地理环境视景,主要论述了虚拟地理环境视景生成平台的构成、设计、模型的构建、离散模型的连接组合、光照技术、天空模型、特殊效果的绘制、分割调度的应用等技术。     

广西旅游资源遥感调查的影像特征作用及意义

文章利用航空图像、法国SPOT - 2、美国Landsat- 5卫星 ,全色和TM波段数据成像等遥感图像资料 ,对广西旅游资源进行了遥感调查。依据旅游资源影像特征解译 ,揭示和发现了 5类 12种基本类型。实践证明 ,旅游资源遥感调查的作用和效果明显 ,可作为政府和决策部门查明并开发本地旅游资源直观快速的调查途径