Using Remote Sensing Data to Delineate the Lineaments for Hydrothermal Mineral Prediction in Heqing Area, Northwest Yunnan Province, China

Lineament extraction and analysis is one of the routine work in mapping medium and large areas using remote sensing data, most of which are satellite images. Landsat Enhanced Thematic Mapper （ETM） of 945×1 232 pixels subscene acquired on 21 March 2000 covering the northwestern part of Yunnan Province has been digitally processed using ER Mapper software. This article aims to produce lineament density map that predicts favorable zones for hydrothermal mineral occurrences and quantify spatial associations between the known hydrothermal mineral deposits. In the process of lineament extraction a number of image processing techniques were applied. The extracted lineaments were imported into MapGIS software and a suitable grid of 100 m×100 m was chosen. The Kriging method was used to create the lineament density map of the area. The results show that remote sensing data could be useful to extract the lineaments in the area. These lineaments are closely correlated with the faults obtained through other geological investigation methods. On comparing with field data the lineament-density map identifies two important high prospective zones, where large-scale deposits are already existing. In addition the map highlights unrecognized target areas that require follow up investigation.     

A Comprehensive Review on Microalgae-Based Biorefinery as Two-Way Source of Wastewater Treatment and Bioresource Recovery

In the past few years, microalgae have gained huge recognition from the scientific community due to their potential applications in the production of a broad array of bio-based products varying from biofuels to nanoparticles. Due to their elevated growth rate, high tolerance to various types of abiotic stresses, and complex metabolic capacity, microalgae can be used as promising tools for the attainment of a circular bioeconomy. Moreover, they can simply utilize nutrients from wastewater for biorefinery purposes, resulting in resource recovery coupled with wastewater treatment. However, due to their sub-optimal yields and high production costs, microalgae-based bio-products have not yet been commercialized. This review provides insights into the employment of microalgae as an efficient bioresource for the treatment of wastewater with simultaneous enactment as a biorefinery to produce biofuels, biochar, bioplastic, fertilizers, and other high-value bioproducts. Furthermore, the application of microalgal nanoparticles in wastewater treatment and prospects for genetic modification of microalgae for enhanced biorefinery capabilities have also been briefly highlighted.     

南设得兰群岛西海域S_(11)岩芯沉积物中碎屑矿物及沉积作用的探讨

本文对南设得兰群岛西海域S_(11)钻孔岩芯中的重、轻矿物作了描述,按矿物在垂直方向上的变化和优势矿物种确定矿物组合类型,并将晚更新世到全新世的341cm沉积地层划分为四层:1.上火山碎屑矿物沉积层,2.中火山碎屑矿物沉积层,3.火成碎屑矿物沉积层(深海砂层),4.下火山碎屑矿物沉积层。本文还讨论了物质来源和深海砂层的可能成因。     

泰安市世行贷款二期项目区地下水监测研究

为合理开发利用地下水资源提供科学依据,确保地下水资源可持续利用,防止由于超采地下水而诱发环境危害,对泰安市世行贷款二期项目区地下水动态变化规律、水资源的分布特征进行了分析研究,提出了地下水合理开发利用的建议.     

臭葱石的初步矿物学研究

广西德保矿区产出的结晶为双锥状的臭葱石的主要化学成分为Fe2O3 34.5%,As2O5 47.75%;而呈葡萄状的臭葱石含Fe2O3 26.67%,As2O5 44.28%, 它们的FeAs≈1,与理想分子式FeAsO4*2H2O接近.根据该矿物(德保)的粉晶X射线分析数据用最小二乘法计算的晶胞参数为a0=10.28(A),b0=10.00(A),c0=8.90(A).Z=8,为斜方晶系,空间群为Pcab.红外吸收光谱分析显示有波数为3505、3420、3000、820、720、490、470、435、415(cm-1)等吸收带.差热分析显示有256℃、945℃和980℃三个明显的吸热谷,还显示有520℃、725℃两个小的放热峰.     

青海五龙沟金矿区蚀变矿物光谱特征与找矿应用

使用近红外光谱仪对五龙沟金矿区主要蚀变矿物进行了光谱测试,获得该矿区主要蚀变矿物的光谱数据;同时选择部分具有代表性的样品进行详细的镜下鉴定,并将镜下鉴定结果与野外实测光谱曲线进行对比分析,检查其对五龙沟金矿体矿化蚀变快速检测的有效性和准确度。对比分析结果表明,蚀变分带与矿体吻合较好,对矿化分带具有较好的指示意义,也为该区的金矿勘探提供了依据。      

有机质对海底沉积物中粘土矿物X射线衍射分析结果的影响

X射线衍射法广泛应用于分析粘土矿物的含量和结晶特征,由于粘土矿物易与有机质结合形成有机-粘土复合体,是否去除有机质对分析结果有很大影响,实验结果表明影响最大的是伊-蒙混层矿物(含蒙脱石)和伊利石的含量,为得到可靠实验数据,必须重视对样品的前处理工作,对不同批次样品应该保持一致的处理程序。     

延安市自然资源监管“一张图”应用实践

自然资源监管是自然资源管理工作的重要内容。本文以延安市自然资源监管“一张图”系统为例,阐述了该系统的建设内容、应用情况及存在问题。系统梳理并建立了延安市自然资源数据目录体系,集成了土地利用监测分析、水源涵养评估等专题监管分析模型,搭建了云环境,以满足潜在的计算和存储性能扩展需求。系统为延安市自然资源监管提供了信息化支撑,也为今后开展更为深入的监管服务奠定了基础。     

重庆市乡村义务教育资源可得性差异及影响因素

以国家统筹城乡教育发展试验区的重庆市乡村地区为例,采用Densi-Graph城乡识别法进行行政区划内部格网尺度的精准识别,在此基础上探究义务教育资源可得性水平的空间差异及影响因素。结果表明：1)基于Densi-Graph城乡识别法的重庆市城乡差异显著,乡村区域面积达79 752 km²,占区域总面积的96.82%。城市部分面积为2 616 km²,占区域总面积的3.18%。2)重庆市义务教育资源可得性水平具有显著的空间集聚与关联特征,并呈现由中心城区向外递减的格局。3)政府重视程度、社会经济发展水平、交通设施水平、自然地理环境均与义务教育资源可得性水平具有显著相关性。4)交通站点密度与教育投入是影响义务教育资源可得性水平的主导因子,二者与各项因子的交互叠加作用增强效果显著;影响机制上,地形起伏度与坡度是乡村义务教育资源可得性水平的限制条件,社会经济是基础,交通是关键,教育投入是核心。     

创新资源协同空间联系与区域经济增长——基于中国省域数据的实证分析

以中国31个省域为空间样本,运用趋势面、引力模型和探索性空间数据分析法研究中国创新资源协同空间联系的动态变化特征,通过构建创新资源协同势能与区域经济增长空间面板计量模型,实证探讨创新资源协同空间联系与区域经济增长关系。研究结果表明：2003~2014年中国各省域创新资源协同状况整体呈现“东南高,西北低”的空间分布特征;创新资源协同空间联系呈现显著的区域不平衡性,空间网络结构分布格局变化显著：从简单雏形逐渐发育为“鸡爪型”、多核心复杂化的“网络型”空间结构;创新资源协同势能呈现显著的空间正相关,主要向东部沿海地区集聚;实证结果显示中国区域经济增长存在显著的空间溢出效应,创新资源协同空间联系对区域经济增长表现出显著的促进效应,可以通过直接效应、间接效应和总效应空间溢出促进区域经济增长。