大冶李德贵冶炼遗址矿冶遗物分析     

魏国锋  秦颍  韩楚文  曲毅  王昌燧  董亚巍 《岩矿测试》2008,27(2):99-102

采用X射线荧光光谱、X射线衍射等测试手段,对大冶李德贵冶炼遗址矿冶遗物进行了物理测试、成分分析和物相分析。物理测试结果表明,遗址炼渣的熔融温度高于1280℃;成分分析结果表明,李德贵炼渣中铜含量很低,远低于炼铜渣的铜含量;而其铁含量很高,与欧洲早期铁器时代和罗马时代的块炼铁渣相近;物相分析结果表明,李德贵炼渣的主要物相与炼铜渣没有区别,但炼铜渣中发现一些铜氧化矿和硫化矿。结合对其他冶炼遗物的分析,可以初步判断该冶炼遗址是一处炼铁遗址。工作台面上发现的炼渣与铁矿石的混合物,表明古人很可能已将炼渣回收利用,与铁矿石原料一起回炉冶炼。  相似文献   

郑州织机洞遗址MIS 3阶段古人类活动的环境背景   总被引：4，自引：0，他引：4       下载免费PDF全文

夏正楷  刘德成  王幼平  曲彤丽 《第四纪研究》2008,28(1):96-102

MIS3阶段,即深海氧同位素第3阶段,是末次冰期中气候比较温暖湿润的时期。大量的考古调查资料表明,这个阶段也是末次冰期中人类活动最活跃的时期,当时不仅人类遗址的数量明显增多,而且石制品也较前也有较大的进步和发展。人类活动与气候环境之间的耦合关系似乎暗示着两者之间存在着某种内在的联系,适宜的气候环境可能是导致人类活动活跃的重要原因。河南郑州织机洞遗址是我国北方重要的旧石器文化中-晚期洞穴遗址,包括上、中、下3个文化层,其中,下文化层距今5.0～3.5万年,属MIS3阶段。本文试以织机洞遗址下文化层为主要研究对象,结合洞外黄土-古土壤剖面的研究,就我国中原地区MIS3阶段人类活动的环境背景做一初步的分析。分析结果表明,在这一阶段,中原地区属于暖温带草原-森林草原环境,气候比较温暖湿润,适宜于人类生活。其中,距今5.0万年前后的MIS3阶段早期,是MIS3阶段中气候最为适宜的时期,也是人类活动最为活跃的时期,当时生长有落叶阔叶树的暖温带森林草原环境,为MIS3阶段旧石器文化的繁荣和发展提供了重要的环境背景。  相似文献   

危险废物填埋场的设计与施工技术          下载免费PDF全文

孙晓东  王丹  曲世才  曹有权 《探矿工程》2008,35(8):64-66

由于危险废物对环境的危害性大,因此对危险废物填埋场设计和施工要求较高。设计的核心内容是防渗层,对施工的要求是要确保高质量地满足设计要求。通过总结国内已建成的危险废物填埋场设计与施工经验,给出了危险废物填埋场设计与施工要点,使危险废物填埋场成为一个真正与生物圈隔绝的场所,不致对环境造成危害和二次污染。  相似文献   

中国海相不同类型原油与沥青生气潜力研究   总被引：4，自引：0，他引：4  

郑伦举  秦建中  张渠  张志荣 《地质学报》2008,82(3):360-365

本文通过固体沥青、沥青砂岩及加入不同介质原油与稠油的加水密闭热压模拟实验,对比研究了海相原油与沥青的气体产率特征、生气潜力及其影响因素.结果表明原油与沥青的生气潜力除与岩性、演化程度有关外,还与其所含可溶有机质性质和组成等密切相关,H/C原子比越大,最大烃气产率越高,生烃气潜力越大.储集岩或运移途径岩石中的原油与沥青,当其再次达到成熟-高成熟阶段时,可以作为新的轻质油气或者天然气源岩.  相似文献   

Geodynamic Indications on Igneous Rocks of Transitory Geologic Setting during the Late Hercynian in North Tarim Basin     

汤良杰  黄太柱  崔泽宏  杨素举  朱毅秀  金仙梅 《中国地质大学学报(英文版)》2008,19(6):577-590

Basic and intermediate-acidic igneous rocks were developed during the late Hercynian in North Tarim basin.The geochemistry characteristics of the rocks show that basic volcanic rock has K2O/Na2O = 0.18-0.61 < 1 and falls into a category of basalt of sodium system.The rocks contain enriched large-ion lithophile elements (LILE) (K,Rb,Ba,Th) and high-field strength elements (HFSE) (Nb,Ta,Ti,Zr,P),with the magmatic material from the upper mantle.The intermediate-acidic volcanic rocks have σ = 1.91-2.96 < 3.3,K2O/Na2O =1.25-1.59 > 1,as well as the enriched LILE and depleted HFSE (Nb,Ta,Ti,P),presenting the same trace element compositions and characteristics as in the granitic rocks of South Tianshan Mt.; they are either shoshonitic igneous rocks or high-K calc-alkaline igneous rocks,with a distinct crust-derived component feature.The comprehensive analyses on the characteristics of the trace elements,the graphic tectonic discrimination,and the distribution features of the two types of igneous rocks show that they were formed under different tectonic settings and geodynamic environments:the basalt was formed in the active rifting period when the active mantle upwelling caused the thinning of lithosphere; the intermediateacidic volcanic-intrusive rock was formed in the island arc area of the active continental margin in North Tarim; the formation is associated with the plate subduction during the course of South Tianshan Ocean closure-the subduction of Middle Tianshan Mountain toward the Tarim plate.The basic and intermediate-acidic igneous rocks reveal a tectonic regime of extension-extrusion transition,which is significant in determining the key tectonic revolution period of North Tarim basin.  相似文献   

Genesis of Marine Carbonate Natural Gas in the Northeastern Sichuan Basin, China   总被引：2，自引：0，他引：2  

ZHANG Qu 《《地质学报》英文版》2008,82(3):577-584

Sichuan Basin is one of the structurally stable and gas-rich basins, being regarded as one of China＇s important natural gas industry bases. Puguang and Jiannan gas fields, located in the eastern Sichuan Basin are two large fields with gas derived from Permian and Lower Triassic marine carbonate. The genesis of marine carbonate natural gas was examined using carbon isotope composition and hydrocarbon components of natural gas samples from the eastern and western Sichuan Basin, and compared with that of acidolysis gas derived from marine source rock in the eastern Sichuan Basin. It is concluded that the natural gas in the marine carbonate reservoir originated from pyrolysis of the earlier crude oil and light-oil, and then mixed with kerogen pyrolysis gas of the Permian and Lower Silurian source rock.  相似文献   

中国高速公路交通气象灾害风险预警业务系统设计与应用     

丰德恩  唐卫  柳艳香  王慕华  李蔼恂  渠寒花 《气象科技》2018,46(4):822-828

针对中国高速公路交通气象灾害风险预警业务需求,以基于影响的预报预警服务技术为指导,综合考虑高速公路致灾因子危险性、孕灾环境暴露度、承灾体脆弱性和防灾减灾能力因子,构建交通气象灾害风险预警模型。在此基础上,采用C/S体系架构,综合运用多源数据接入与可视化、基于GIS技术的产品自动加工制作方法等技术,研发高速公路交通气象灾害风险预警业务系统。系统具备气象实况监测告警、灾害预警分析、产品自动加工制作、人机交互订正、服务产品交互制作、数据接入与综合显示、地图管理与操作等功能。系统在交通气象服务业务使用过程中,突显出较好的业务应用能力与发展前景。  相似文献   

毛细管离子电泳分离间接紫外光度法测定镍矿石镍钴铜   总被引：1，自引：0，他引：1  

杨永坛  梁冰 《岩矿测试》1998,17(4):275-278

研究了以咪唑为背景吸收电解质,α－羟基异丁酸为络合剂,毛细管离子电泳分离,间接紫外光度法测定镍矿石中Ｎｉ,Ｃｏ,Ｃｕ含量。考察了背景电解质的ｐＨ值,α－羟基异丁酸和咪唑浓度对Ｆｅ＾３＋,Ｃｏ＾２＋,Ｎｉ＾２＋,Ｚｎ＾２＋,Ｃｕ＾２＋分离的影响,在优化的条件下,几种离子在８ｍｉｎ内完成分离,检测限低至０．２ｍｇ／Ｌ,以Ｚｎ作内标,改善了方法的精密度,对于２０ｍｇ／Ｌ各离子峰面积的相对标准偏差〈６．５  相似文献   

A Particle Tracking Model for Non-Fickian Subsurface Diffusion     

Paul S. Addison  Bo Qu  Alberto S. Ndumu  Ian C. Pyrah 《Mathematical Geology》1998,30(6):695-716

In this paper, a new particle tracking technique is described which can simulate non-Fickian diffusion within porous media. The technique employs fractional Brownian motions (fBms), a generalization of regular Brownian motion. These random fractal functions allow both super- and subdiffusive particle paths to be produced and hence non-Fickian diffusion of the resulting panicle clouds can be modeled. In recent years, fBm trace functions have been used by many authors to reproduce self-affine random fields to simulate various porous media properties. In contrast, a method is detailed herein which uses self-similar spatial fBm trajectories to simulate directly non-Fickian behavior of the particle clouds. Although fractal trajectories have been previously suggested as the basis for possible methods of modeling non-Fickian diffusion, the authors believe that this paper contains the first algorithm to be presented which does not require an a priori knowledge of the end condition of the random walk and, more importantly, allows both a definable scaling exponent and (fractal) diffusion coefficient to be specified. The resulting non-Fickian diffusion using the new algorithm is illustrated and some applications are discussed. The purpose of this paper is to bring the potential usefulness of fBm trajectories in simulating non-Fickian processes within homogeneous media to the attention of numerical modelers active in the simulation of subsurface diffusive processes. The method has a particular environmental application in the simulation of the non-Fickian dispersion of groundwater contaminants through porous media.  相似文献   

应重视和加强我国沙漠绿洲的研究   总被引：2，自引：1，他引：2  

文子祥  董光荣 《地球科学进展》1996,11(3):270-274

把散布在我国干旱荒漠地带内的沙漠绿洲，统一组合成一种独特而完整的生成地域单元开展研究，应予重视和加强。沙漠绿洲是干旱荒漠地带内精华地域，也是今后该地带开发建设和经济发展基地，还是改造利用沙漠的潜力与希望所在。随着我国经济发展战略重点向西北转移，开发建设和整治利用沙漠绿洲，有着特别的重要性和紧迫性。  相似文献