浙江江郎山丹霞地貌发育的年代与成因

江郎山位于华南褶皱系、江山-绍兴深断裂和保安-峡口-张村断裂带之间.白垩纪早期这两大断裂的拉张断陷导致峡口盆地的形成,随之主要有下白垩统永康群馆头组(K1g)、朝川组(K1c)和方岩组(K1f)在盆地中的沉积.白垩纪晚期上述两大断裂发生强烈挤压活动,峡口盆地逐渐隆升.新生代以来,峡口盆地在构造抬升中,产生大量张断裂和节理,加速了对岩体的切割,以及岩体被切割后的崩塌,导致了丹霞地貌的发育.江郎山丹霞地貌申报世界自然遗产的主要依据是其特有的壮观而独特的老年期孤峰-巷谷以及生动而逼真的象形石丹霞地貌特征、独特的地台活化现象与重要的岩石学科学研究意义以及该区特有的重要事件地层学和古生物学研究的科学意义.本文根据对江郎山亚峰垂直贯穿于丹霞地貌岩层永康群中辉绿岩脉标本K-Ar法的测年,揭示了当地峡口红层盆地抬升的时代为晚白垩世77.89±2.6Ma BP(K2),这也是我国目前丹霞地貌研究中所测得的可靠年代学数据.     

内蒙古歌吟——锡林郭勒篇

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山区河流系统健康评价方法研究

本文通过对山区河流的基本特征研究,从生态功能和人类服务功能两大角度建立了山区河流健康评价系统,并基于投影寻踪理论构建了山区河流健康评估指标体系。以中国西南地区某典型山区河流为研究对象,本文对该河流水电开发前后的健康状况进行了研究。结果显示水电开发后河流综合健康状况较现状有显著提高。在此基础上,本文进一步通过对投影指标体系的结构特征分析,提出了维持河流健康的对策。     

Environmental archaeology on Longshan Culture （4500-4000 aBP） at Yuhuicun Site in Bengbu, Anhui Province

Based on the samples collected from the west wall of the ABYT2004 at Yuhuicun Site in Bengbu,Anhui Province,the multi-environmental substitute indexes such as the grain-size,Rb/Sr,zircon crystal morphology and magnetic susceptibility were analyzed.The age of archaeological strata was determined by AMS14C dating.According to the results,combined with the information of the ancient human activities and the cultural heritage data obtained from the Longshan cultural archaeological strata,it can be concluded tha...     

晋城成庄煤层气探明储量估算及经济评价

在划定储量计算单元的基础上,采用体积法对晋城成庄区块3号、9号、15号煤层的煤层气探明储量进行了估算,结果为66.36×108 m3,显示成庄区块属于浅—中层、低产、中丰度的中型气田。为论证成庄区块煤层气开发的经济性,编制了煤层气储量经济评价程序,设计出煤层气开发方案,并进行了经济评估。结果表明:设计煤层气开发区动用储量为21.19×108 m3,其中,经济可采储量为15.75×108 m3,剩余储量为5.44×108 m3;经评价各项经济指标良好,财务内部收益率为22.2%,高于天然气行业基准收益率,盈亏平衡点低,动态投资回收期7.82 a (低于8 a),地面煤层气开发经济可行。      

齐齐哈尔市土地资源可持续利用研究

一、齐齐哈尔市土地利用所存在的主要问题 土地资源退化逐年加剧,土地沙化、盐碱化、水土流失及土壤污染面积不断扩大。人口的不断增长和经济的发展对土地资源的需求不断增加。齐齐哈尔市区人均耕地低于全省人均0．109ha和全国的平均水平0．107ha,随着人口的增长和建设用地的不断增加,人均土地和人均耕地面积仍将继续下降,人地矛盾更加突出。后备土地资源不足,可以作为耕地使用的未利用土地十分有限。     

中国传统农区1820年耕地数据网格化方法

Recent studies have demonstrated the importance of LUCC change with climate and ecosystem simulation, but the result could only be determined precisely if a high-resolution underlying land cover map is used. While the efforts based satellites have provided a good baseline for present land cover, what the next advancement in the research about LUCC change required is the development of reconstruction of historical LUCC change, especially spatially-explicit historical dataset. Being different from other similar studies, this study is based on the analysis of historical land use patterns in the traditional cultivated region of China. Taking no account of the less important factors, altitude, slope and population patterns are selected as the major drivers of reclamation in ancient China, and used to design the HCGM (Historical Cropland Gridding Model, at a 60 km×60 km resolution), which is an empirical model for allocating the historical cropland inventory data spatially to grid cells in each political unit. Then we use this model to reconstruct cropland distribution of the study area in 1820, and verify the result by prefectural cropland data of 1820, which is from the historical documents. The statistical analyzing result shows that the model can simulate the patterns of the cropland distribution in the historical period in the traditional cultivated region efficiently. Foundation: National Natural Science Foundation of China, No.40471007; Innovation Knowledge Project of CAS, No.KZCX2-YW-315 Author: Lin Shanshan (1982–), Master, specialized in historical environmental change.     

江苏宜兴骆驼墩遗址地层7500-5400BC的海侵事件记录

Based on archaeological excavations, 217 samples were collected from the Luotuodun Site. Of them 63 samples from the section plane of the site layer were used for identification analysis of foraminifera, plant debris and seed fossils, and four samples were used for ¹⁴C dating and relevant analysis. Through many kinds of experiments, we have drawn some conclusions. Firstly, benthic foraminifera, such as Ammonia compressiuscula and Ammonia cff. sobrina, are found in the 10th layer, indicating that between 7500 and 5400 BC, i.e. before the emergence of the Majiabang Culture, Luotuodun Site and its nearby regions had ever experienced a marine transgression event. Secondly, we have found 450 plant fossils in this site, such as Polygonum sp., Scripus sp., Najas sp., Physalis sp., which indicated lacustrine or swamp environment.     

煤层气与煤炭资源协调开发浅析

煤层气与煤炭资源协调开发,是指从煤层气和煤炭为密切共生的不同物相的矿产资源这一基本事实出发,考虑其开采在时间顺序、空间布局、相互影响等关系,按照“采气-采煤一体化”、“地面与井下立体开发”的技术思路,在资源勘查、开发规划与设计、开采途径和技术应用等方面统一部署,相互协调,以实现对这两种矿产资源进行合理、有效的开发利用。从煤层气的资源地位、煤矿安全生产需求和建设循环经济的需求等3方面阐述了协调开发的意义;并指出协调开发技术包括煤层气与煤炭资源同步勘探和协调开采两个方面。      

基于"五缘"优势的闽台旅游资源整合开发研究

闽台旅游合作具有重大的政治意义、经济意义和文化意义.对旅游资源进行整合开发是闽台区域旅游合作的前提和基础.以闽台"五缘"优势为基础,分析了闽台旅游资源的现状.将"五缘"优势融合到旅游资源的整合开发中,提出了闽台旅游资源整合的"三力"整合模型:以血缘、商缘为内动力,明确闽台两地的相对旅游资源优势,开发出适销对路的旅游产品,以旅游互动为闽台优势旅游资源对接的主要方式;以地缘、文缘为外扩力,实施闽台品牌旅游资源对接、黄金旅游线路组合与策划及"海峡旅游"品牌共推的策略;以法缘为保障力,提出闽台旅游资源整合所需的保障措施,并对这些措施进行了探讨.