浙江省农业地质环境评价的基本思路与方法

区域农业地质环境评价的科学性和准确性及其深度、广度直接关系到农业地质环境调查资料的开发利用水平和社会化应用程度.本文结合浙江省农业地质环境调查工作,初步总结了区域农业地质环境评价的主要研究内容,围绕应用服务目标讨论了区域农业地质环境评价方法,列举了相关评价标准,探讨了制订地方性农业地质环境评价标准的技术方案.     

初论农业环境地质与农业环境地质问题

本文初步提出了农业环境地质的概念,对它的科学地位和学科体系进行了探讨,并简述了五类主要的农业环境地质问题,以期丰富环境地学学科内容,保进农业环境地质研究。     

农业地质研究进展及主要研究问题

在回顾国内外农业地质发展过程的基础上,分析了当前我国地质和农业面临的问题与挑战,提出了我国当前农业地质的六项主要任务,即农业地质环境调查、农业生态地球化学评价、地区性农业结构调整和城镇化发展规划、污染土壤的修复机制和修复技术研究、区域农业地质环境改造利用与农业生态地质工程、地质体有用性的发掘和合理开发利用等。最后,指出了农业地质的学科发展动向。     

地质为农业服务的初步探讨：盱眙县农业环境地质评价简介

通过介绍“盱眙县农业环境地质评价”,提出了开展农业地质工作的思路、方法及成果的编制。对如何开发地质资源,控制地质灾害,以服务于农业,进行了有益地探索。     

农业地质大有可为--对当前拓宽开发矿业服务领域的思考和建议

叙述了吉林省的区域地质环境和与农业地质相关的优势--非金属矿产资源.介绍了本省具有农业经济特色的名、优、特农业经济作物产品.提出了农业地质勘察、研究与开发工作的基本内容,并进一步探讨了开展农业地质的思路和方法问题.     

面向21世纪的萧山国土资源调查工作

阐述了萧山地区地质演化简史和国土资源优势,分析了面临的历史性任务,提出了应该进行的基础地质、矿产地质、第四纪地质、工程地质、外营力地质灾害、地震地质、环境地质、旅游地质、农业地质和地球信息科学研究等１２ 个方面的工作,论述了旅游、环境和土壤地质研究的有关具体方法。     

面向21世纪的萧山国土资源调查工作

阐述了萧山地区地质演化简史和国土资源优势,分析了面临的历史性任务,提出了应该进行了基础地质、矿产地质、第四纪地质、工程地质、外营力地质灾害、地震地质、环境地质、旅游地质、农业地质和地球信息科学研究等１２个方面的工作,论述了旅游、环境和土壤地质研究的有关具体方法。     

土壤与农业地质土壤

文章简述农业土壤的概念,物质组成，剖面特征，分类以及地理分布规律，论述土壤与地质环境的关系，提出农业地质土壤的概念，并初步介绍了农业地质土壤的分类和作用。     

河北元氏丘陵山区农业生态地质类型

农业生态地质类型是农业生态地质调查研究综合性成果之一，是其调查填图的基本单位，利用把地质环境与农业生态作为一整体系统的思路，确定了农业生态地质类型划分的原则；整体系统中的主导因素，地上农业生态质量差异和宏观识别特征明显，研究区区有农业生态地质类3个、型16个，而且不同类型上农业生态质量特征差异显著。     

农业生态地质环境质量综合评价：以吉林省乾安县为例

乾安县是吉林省重要的粮食生产县之一。近３０年来,由于人口剧增,人为对农业资源的过量开发,导致干旱缺水,耕地碱化、贫瘠化和沙化,地氟病也十分严重,制约了农业的可持续发展。本文以农业生态环境地质的理论为基础,以系统论为指导,将该区的地质地貌作为一个大系统,该系统由水资源环境、土地资源环境、生物资源环境和农业社会环境４个子系统组成。进而,建立了农业生态地质环境质量评价的指标体系,并采用层次权重分析法和综     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861