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1.
皖南大坞尖钨(钼)矿床地质特征及成因分析   总被引:3,自引:1,他引:2  
大坞尖钨(钼)矿床是皖南地区新发现的小型钨(钼)矿床.该矿床的矿体主要呈似层状,主要赋存于蓝田组下段白云质灰岩和钙质泥岩中.赋矿围岩以强烈的绢云母化、硅化和碳酸盐化为特征,矿石矿物为白钨矿和辉钼矿,脉石矿物主要有石英和绢云母.矿床的形成可划分4个成矿阶段,即无水矽卡岩阶段、含水矽卡岩阶段、石英硫化物阶段和碳酸盐阶段.通过对矿床地质特征和控矿因素的综合分析研究,认为大坞尖钨(钼)矿床属矽卡岩-云英岩复合型热液矿床,研究区具有重要的找矿潜力.  相似文献   
2.
“李商隐现象”的成因是义山诗歌话语层面及内在意境的审美特征的外在呈现。义山诗歌无“隔”不成诗,朦胧而绮密,并且具有文外之重旨的审美特征。义山诗歌是其心灵深处迷惘、凄迷心性的真实写照,意蕴深邃、韵味无穷。“蓝田日暖玉生烟”是其创作的审美追求,更是其重要文论思想的概括,对后世文论的发展产生了积极影响。  相似文献   
3.
系统描述了陕西蓝田锡水洞遗址的洞穴堆积物中用筛洗法采集的鼠科化石的4属6种:M.musculus,Apcdemuschevrieri,A.agrarius,Apodemussp.,V,cfforamena,Leapodalmyscf.edwardsi,并分析了它们的古环境意义。  相似文献   
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5.
徐艳娟 《河南科技》2013,(6):190+247
本文对蓝田汤峪地热田的区域地质概况、地热地质条件进行了分析,对地热田的开发利用现状进行了阐述,提出了地热田开发利用中存在的问题,为使西安市的地下热水能可持续开发利用,提出合理的建议。  相似文献   
6.
皖南上震旦统蓝田组地层中,硒(Se)显著富集.其露头剖面丰度为4.4×10-6,钻孔剖面丰度为41.3×10-6,后者为地壳平均丰度(0.09×10-6)的460倍.硒的富集系数为黑色炭质页岩>条带状泥灰岩>含锰粉砂质泥岩>含锰碳酸盐岩.硒富集的控制因素主要是缺氧环境,其含量与(银+汞)成正相关.硒的来源主要是陆源,海底热水溶液不是蓝田组硒有影响的来源  相似文献   
7.
浚县“蓝田泥塑”品牌的塑造可采用三化模型,即“品牌用途化→品牌产品化→品牌形象化”。可分三个阶段向消费者传递不同层次的信息诉求,分别是:首先,告诉消费者“蓝田泥塑”泥咕咕的特点、用途,这可以满足消费者最基本的心理需求;其次,告诉消费者“蓝田泥塑”泥咕咕的历史根基、文化底蕴和美好寓意;最后,告诉消费者,只有“蓝田泥塑”品牌的产品才拥有纯正文化血统和历史根基。最终使这一品牌成为消费者心中第一泥塑品牌。在中原经济区建设的大背景下,提炼河南省众多非物质文化遗产品牌的核心价值,走产业化、品牌化发展之路,这是使非物质文化遗产获得世人广泛关注的最佳途径。  相似文献   
8.
了解最近10 000 a来的植被和环境对制定治理黄土高原及其水土流失的战略方针、预测未来黄土高原的气候变化都具有重要的意义.作者在阐述陕西蓝田县城附近地质环境的基础上,利用孢粉图式分析了该区植被的演替,进而分析了该区全新世的古气候演化特征.据17个样品分析发现孢粉和藻类十分丰富,将孢粉图式分为三个带,分别代表全新世早、中、晚三个时期的孢粉带.Ⅰ带为蒿属优势带;Ⅱ带是乔木花粉激增,早期发育有温带阔叶落叶林或针阔叶混交林,晚期是以温带阔叶树或与松混合的疏林草原或森林草原;Ⅲ带是以栎、蒿为主的森林草原或疏林草原.结果表明早全新世气候较冷较干,发育有以蒿为主的大片草原;中全新世气候温暖湿润,发育了疏林草原和森林草原;晚全新世渐变为干燥而寒冷,是以松、蒿为主的森林草原.  相似文献   
9.
The study of the Xishuidong micromammalian fauna, found from Lantian, Shaanxi Province, indicates that both the northern slope of the Qinling Mountains and Sichuan-Guizhou area must belong to the same Oriental Realm in middle-late Middle Pleistocene. The age of the Xishuidong fauna should be later than that of the Gongwangling fauna, and even a little later than that of the Zhongjiawo fauna in age. The fauna is related not only to that of layers 9 and 8 of Peking Man locality in northern China, but also to the micromammals from Hexian Man Locality in southern China.  相似文献   
10.
Eight new Palaeolithic open-air sites were identified and 770 stone artefacts were collected from 2009 to 2011 in the Lantian area of the Bahe River valley, central China. Because the famous Homo erectus fossils were unearthed at the Gongwangling and Chenjiawo localities, and more than 30 Palaeolithic open-air sites were investigated in the 1960s in this region, the catchment of Bahe River is regarded as one of the most important hominin sites from the late early Pleistocene to the middle Pleistocene. These eight newly discovered open-air sites are located at the second(n = 6), third(n = 1) or higher terraces(n = 1) of the Bahe River. The Diaozhai section on the second terrace was sampled in detail. Two samples were collected for optically stimulated luminescence dating(OSL). The OSL results suggest that a buried lithic artefact layer at the Diaozhai site spans approximately 70–30 ka. The lithic assemblage analysis suggests that the stone artefacts were made of local pebbles/cobbles such as greywacke, quartz, sandstone and igneous rocks. The main percussion techniques that were used were direct hard hammer percussion and bi-polar techniques. The lithic artefacts comprise hammer stones, cores, flakes, retouched tools and flaking debris. Acheulian-type large cutting tools(LCTs) such as hand-axes, picks and cleavers were indentified in the Lantian region as well. This is the first time Acheulian-type LCTs from the late Pleistocene have been identified in this region. This study distinguishes age gaps between Western world and East Asian Acheulian-type tools.  相似文献   
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