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从全国地质资料馆(NGA)馆藏区域地质调查资料编著的时间、地质资料的记载的内容、调查的组织机构、调查的目的、手段、方法等方面分析,发现中国的区域地质调查工作具有明显的阶段性,不同时期编著的区域地质资料,存在一定差异,并根据这些差异将其划分为:萌芽期、起步期、大发展期和数字填图期. 相似文献
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《地球科学与环境学报》1993,(Z1)
西安地质学院区调队是一支技术力量雄厚、业务水平精湛的科技队伍,现有固定编制技术人员二十余名,具高级职称人员9名,中级职称人员8名,硕士学历人员13名。近年来,先后承担横穿秦岭造山带8幅1/5万区调填图及造山带地质断面综合研究大型课题,总经费近180万元。除此而外,在新疆、甘肃、宁夏等地也承担有填图和科研业务。 相似文献
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目前基于野外地质调查数据自动、快速地建立区域三维地质体模型是中国全面开展三维数字地质填图的迫切需求。本文基于产状、地质界线与路线剖面等野外区域地质调查要素,提出了一种二维平面地质图及路线剖面图向三维地质体模型的快速转换方法。该方法针对无剖面约束及含剖面约束2种情形,通过地质界线区域分割、多段线仿射变换等空间几何变换处理,推估出剖面线约束的地下地质界线,基于Coons曲面构建出地质体的侧面模型;然后,通过约束三角网算法构建地质体的顶、底面模型,最终建立拓扑一致的区域地质体三维模型。基于此方法,对中国1:2.5万区域地质调查试点区域进行了区域三维地质建模实践,实现了火山口、地层、岩体、断层等典型地质构造的快速三维重建。 相似文献
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数字地质填图是指在计算机辅助下,通过野外观测路线的调查,对地质、地理、地球物理、地球化学和遥感等多源地学数据进行综合分析和地质制图,从而实现区域地质调查数据的野外获取及其成果的数字化统一性再现。1∶25万大庸市幅—吉首市幅区域地质调查项目是中国地质调查局在湖南部署的首个数字地质填图图幅。 相似文献
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数字地质填图是指在计算机辅助下，通过野外观测路线的调查，对地质、地理、地球物理、地球化学和遥感等多源地学数据进行综合分析和地质制图，从而实现区域地质调查数据的野外获取及其成果的数字化统一性再现。1：25万大庸市幅一吉首市幅区域地质调查项目是中国地质调查局在湖南部署的首个数字地质填图图幅。 相似文献
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经中国地质调查局批准，作为示范试点，河南省地质调查院在今年新开的《1：25万枣阳市幅、信阳市幅区域地质调查》项目中首次采用数字填图技术。数字填图技术是集GIS、GPS、RS和计算机技术为一体的现代地质工作重要方法和技术手段。其核心是对多源地学空间信息的数据采集、存储、检索、分析、表达等实现全流程数字化。该项新技术的应用，标志着我国地质调查工作进入了一个崭新的阶段，开始了传统地质工作的数字化革命。 相似文献
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地质填图是在预查、普查阶段的一种大面积综合性地质矿产调查工作,也是研究区域地质矿产情况的一种重要方法。野外地质填图过程中使用GPS定点,在形成地质草图时地质点坐标有少许人为误差,在室内工作进行地质图转绘以及地质图矢量化时地质点坐标也存在一定误差。在右玉杨村预查项目地质填图形成的电子版地质图时使用GPS中自带Basecamp软件将地质点全部导出,与地形图直接镶嵌配准,将地质点坐标生成电子版地质图过程中的三次人为误差消除,极大地提高了地质填图的准确性,为下一步地质工作提供了有利的地质依据。 相似文献
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西藏双湖角木日地区发育一套典型的造山带混杂岩,包括陆源复理石、海山块体、蛇绿岩块体、外来岩片、洋壳残片和高压变质岩块体等,其总体经历了强烈的构造混杂和变形变质作用。通过多年来在该区区域地质调查和填图工作实践,以对该区混杂岩的划分和合理建立混杂岩填图单位为目的,采用大比例尺物性填图结合构造填图等方法,结合露头尺度岩块与基质变形和变质调查,初步总结出适合该区造山带混杂岩的地质填图思路:依边界断裂为界划分岩片级构造单元,在岩片内部基质和外来岩块划分基础上建立混杂岩填图单元,将混杂岩作为地质实体进行构造填图,重视物性填图,造山带混杂带填图综合采用构造填图与物性(岩性)填图有机结合的双重填图法,表达客观存在的地质体,在角木日混杂岩地区区域地质调查中达到了较好的填图效果。 相似文献
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浅谈数字填图技术的应用 总被引：1，自引：0，他引：1
从当前实施的1:25万填图技术应用方面展开论述,从地形图资料底图数字化、PRB字典库的建立、野外PRB过程,室内PRB整理到野外原始数据库建库、实际材料数字图、地质编稿数字图的形成到最终成果地质图空间数据库建库等方面加以论述. 相似文献
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Qingying ZHAO Jinxin HE Guoliang WANG Xiumei HAN 《东北亚地学研究》2007,10(1):95-99
Digital geological mapping fundamentally broke through the traditional working pattern,successfully carried out the geological mapping digitalization.By using the RGMAP system to field digital geological mapping,the authors summarized the method of work and the work flow of the RGMAPGIS during the field geological survey.First,we prepared material,set up the PRB gallery,then put the geographic base map under the background maplayer and organizing the field hand map,forming the field factual datum map.At last,the geological space database is formed. 相似文献
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Digital geological mapping fundamentally broke through the traditional working pattern, successfully carried out the geological mapping digitalization. By using the RGMAP system to field digital geological mapping, the authors summarized the method of work and the work flow of the RGMAPGIS during the field geological survey. First, we prepared material, set up the PRB gallery, then put the geographic base map under the background maplayer and organizing the field hand map, forming the field factual datum map. At last, the geological space database is formed. 相似文献
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This research studies the reliability of an activated carbon permeable reactive barrier in removing cadmium from a contaminated shallow aquifer. Laboratory tests have been performed to characterize the equilibrium and kinetic adsorption properties of the activated carbon in cadmium-containing aqueous solutions. A 2D numerical model has been used to describe pollutant transport within a groundwater and the pollutant adsorption on the permeable reactive barrier (PRB). In particular, it has been considered the case of a PAB used to protect a lake or downstream from Cd (Ⅱ) contaminated groundwater. Numerical results show that the PAB can achieve a long-term efficiency by preventing lake or downstream pollution for several months. 相似文献
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Alkali Mohammed Changlai XIAO Chao DU 《东北亚地学研究》2008,11(4):197-202
This research studies the reliability of an activated carbon permeable reactive barrier in removing cadmium from a contaminated shallow aquifer. Laboratory tests have been performed to characterize the equilibrium and kinetic adsorption properties of the activated carbon in cadmium-containing aqueous solutions. A 2D numerical model has been used to describe pollutant transport within a groundwater and the pollutant adsorption on the permeable reactive barrier （PRB）. In particular, it has been considered the case of a PAB used to protect a lake or downstream from Cd （II） contaminated groundwater. Numerical results show that the PAB can achieve a long-term efficiency by preventing lake or downstream pollution for several months. 相似文献
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利用新版GRACE时变模型反演珠江流域陆地水储量变化 总被引：1，自引：0，他引：1
本文以CSR05、GFZ05、JPL05、ITSG-Grace2016、CSR06、GFZ06、JPL06及ITSG-Grace2018等8种GRACE时变重力场模型作为研究对象,通过300 km高斯滤波和Swenson方法等数据处理策略去除时变模型的噪声,反演2005-01~2012-12珠江流域的陆地水储量变化,并利用ITSG-Grace2018模型、GLDAS水文模型、降水数据、实测地下水数据等资料对珠江流域的陆地水储量变化进行综合分析。结果表明：1）3大官方机构发布的2006版GRACE时变模型的解算精度较2005版有显著改善,ITSG-Grace2018模型的精度也较ITSG-Grace2016有一定的改善,且新版在不同时变模型间的差异更小;2）ITSG-Grace2018模型反演的珠江流域陆地水储量整体呈上升趋势,其季节性变化特征与GLDAS水文模型、降水数据及地下水测井监测数据具有较好的一致性。 相似文献
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Alkali Mohammed 《东北亚地学研究》2008,(4)
This research studies the reliability of an activated carbon permeable reactive barrier in removing cadmium from a contaminated shallow aquifer.Laboratory tests have been performed to characterize the equilibrium and kinetic adsorption properties of the activated carbon in cadmium-containing aqueous solutions.A 2D numerical model has been used to describe pollutant transport within a groundwater and the pollutant adsorption on the permeable reactive barrier(PRB).In particular,it has been considered the case... 相似文献
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The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature. 相似文献
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《极地研究(英文版)》2014,(4)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprehensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose 相似文献