基于相似性的无资料地区模型参数确定          下载免费PDF全文

施征  包为民  瞿思敏 《水文》2015,35(2):33-38

基于新安江模型,利用GIS技术和相似性分析开展流域无资料情况下的水文模拟。在提取流域特征值的基础上,通过相关分析、聚类分析等方法判定相似流域,有效地分析了模型参数与流域特征的关系,重点论证了相似流域参数移植的可行性。通过相似性分析,发现相似流域的水文参数在几何空间上距离较近。基于此结论,本文对无资料地区进行了水文模型参数的确定,并取得了较好的模拟结果。  相似文献   

德兴朱砂红矿床含辉钼矿岩石样品Re_Os定年及地质意义     

曲焕春  周利敏  杨志明 《岩石矿物学杂志》2015,34(4):517-525

辉钼矿中Re、Os含量高且几乎不含普通Os,通常被认为是开展金属矿床定年的理想对象。然而,在一些矿床中辉钼矿常以浸染状产出,矿物颗粒微小,挑纯难度较大,本文尝试使用含辉钼矿的岩石样品进行测年实验。选择研究程度较高、年龄数据较多的德兴斑岩铜矿田朱砂红矿床的4件含辉钼矿岩石样品进行了Re_Os同位素定年,结果获得等时线年龄为172.6±2.6 Ma,与前人已获得的年龄数据基本一致,说明该年龄数据可靠,样品中的硅酸盐矿物对定年结果没有影响。德兴斑岩铜矿田中3个矿床的辉钼矿Re_Os年龄与花岗闪长斑岩的锆石U_Pb年龄相一致,表明其矿化与斑岩侵入体直接相关。而前人获得的Rb_Sr年龄及K_Ar年龄与近年得到的Re_Os、U_Pb年龄数据存在差别的原因可能是后期热液蚀变及热事件破坏或重置了Rb_Sr和K_Ar同位素体系。  相似文献   

辽宁东部晚古生代本溪组煤系地层鳞木的发现及其意义     

曲跃  曹成润  张武  张宜 《地质通报》2015,(Z1):419-424

最近在辽宁本溪牛毛岭剖面上的上石炭统(宾夕法尼亚亚系)本溪组新洞沟段(本溪组中段)的煤系地层中发现了大量鳞木化石。现有资料证明,在牛毛岭剖面本溪组复洲湾段(本溪组上段)灰岩中发现了属于晚石炭世莫斯科期的牙形石,而在牛毛岭剖面邻近地区本溪组湖田段(本溪组下段)中则发现了属于早石炭世(密西西比亚纪)的亚鳞木、大脉羊齿和贝叶。由此认为,新发现的牛毛岭剖面本溪组新洞沟段(本溪组中段)的鳞木化石,应晚于早石炭世,早于晚石炭世莫斯科期,即应属巴什基尔期。鳞木是辽宁东部第一次成煤期滨海沼泽相成煤植物群中的代表性植物。  相似文献   

河北省涞源县木吉村铜(钼)多金属矿田成矿物质来源探讨   总被引：1，自引：0，他引：1  

张建珍  孙爱群  王海涛  马国玺  陈志宽  王自力  陈超  王宝德  牛树银  张福祥  马宝军 《吉林大学学报(地球科学版)》2015,(1):106-118

木吉村铜(钼)矿田位于太行山脉中、北段阜平幔枝构造的北东倾伏端,涞源哑铃状杂岩体连接处西侧上盘拆离带的次级断陷盆地中,主要由斑岩型铜(钼)矿、矽卡岩型铁铜矿和外围热液脉型铅锌矿构成,是河北省目前探明的唯一大型铜(钼)多金属矿田,找矿远景巨大。鉴于矿床成矿物质来源在研究矿床成因和指导找矿中的重要作用,对木吉村矿田主要矿床矿石中黄铁矿、黄铜矿、方铅矿、辉钼矿、磁铁矿、石英和石膏等单矿物进行了硫、铅、碳、氢、氧、硅、铼等同位素测定、对比和分析。结果表明:矿田中硫同位素主值域δ34S=-3.5‰~3.2‰,主平均值为0.3‰;铅同位素206 Pb/204 Pb=15.566 0~17.072 0,平均为16.547 0,207Pb/204Pb=15.031 0~15.523 0,平均为15.258 0,208 Pb/204 Pb=36.292 0~37.375 0,平均为36.721 0;碳同位素δ13 C为-2.94‰~-2.18‰,平均为-2.62‰;硅同位素δ30 SiNBS-28值域为-0.3‰~0.2‰,平均0.0‰;辉钼矿w(Re)为(23.65~266.50)×10-6,平均值为142.33×10-6;δ18 OH2O值为-10.64‰~7.70‰,极差为18.34‰,平均值为-1.47‰,较标准岩浆水值稍低,δD值为-148.4‰~-89.0‰,极差为59.4‰,平均值为-113.7‰,略低于岩浆岩δD值域。从而认为,木吉村矿田成矿物质主要来源于地球深部,成矿溶液以岩浆水为主,部分来自大气降水。  相似文献   

北京延庆千家店地区土城子组恐龙足迹点沉积环境   总被引：2，自引：2，他引：0  

何情  张建平  邢立达  路硕  屈海英 《地质通报》2015,34(9):1726-1734

北京延庆千家店地区晚侏罗世土城子组化石稀少,而新发现的恐龙足迹是北京恐龙存活过的重要证据,研究其沉积环境对恢复当时恐龙动物群的生活环境具有十分重要的意义。研究区恐龙足迹主要包括兽脚类、蜥脚类和可能的鸟脚类足迹。运用地层学、岩石学、古生物学和沉积学方法,通过地层剖面、岩石薄片、足迹分布、沉积构造及详细的粒度分布特征,综合得出千家店地区土城子组三段恐龙足迹点的沉积环境,认为当时的沉积环境为含火山碎屑的浅湖沉积,恐龙足迹的赋存层位为湖滨环境。  相似文献   

辽宁东部晚古生代本溪组煤系地层鳞木的发现及其意义     

曲跃  曹成润  张武  张宜 《地质通报》2015,34(203):419-424

最近在辽宁本溪牛毛岭剖面上的上石炭统（宾夕法尼亚亚系）本溪组新洞沟段（本溪组中段）的煤系地层中发现了大量鳞木化石。现有资料证明,在牛毛岭剖面本溪组复洲湾段（本溪组上段）灰岩中发现了属于晚石炭世莫斯科期的牙形石,而在牛毛岭剖面邻近地区本溪组湖田段（本溪组下段）中则发现了属于早石炭世（密西西比亚纪）的亚鳞木、大脉羊齿和贝叶。由此认为,新发现的牛毛岭剖面本溪组新洞沟段（本溪组中段）的鳞木化石,应晚于早石炭世,早于晚石炭世莫斯科期,即应属巴什基尔期。鳞木是辽宁东部第一次成煤期滨海沼泽相成煤植物群中的代表性植物。  相似文献   

鞍本地区超大型铁矿床分布规律及特征     

刘忠元  付海涛  刘陆山 《化工矿产地质》2015,(2):65-71

鞍本地区是我国最重要的沉积变质铁矿产地之一,该区已探明的铁矿资源/储量约占全国同类型铁矿已探明资源/储量的40%。区内已发现有9个资源/储量大于10亿t的超大型铁矿,它们分布在东西长约85km、南北宽约25km的带状区域内,超大型铁矿密度之大非常罕见。超大型铁矿分布于区内鞍山群南部边部区域,与茨沟岩组、樱桃园岩组含铁层位密切相关。如果去除人为划分矿床范围因素,一些超大型铁矿床的资源储量大于30亿t。这些超大型铁矿床延深很深、规模很大;矿体既有厚大板状体,也有多层状矿体。  相似文献   

Distribution Characteristics and Metallogenic Regularity of Graphite Deposits in Qinling Orogen, China     

FENG Yangwei  QU Hongjun  YANG Chenyi  LV Lushi 《《地质学报》英文版》2015,89(4):1244-1263

Qinling orogen is one of the five main repository distribution provinces of large scale graphite resources. Graphite occurrence strata are multitudinous including Neo Archaean group to Neopaleozoic. Mineral deposit types are complete consisting of crystal flaky graphite deposit and aphanitic graphite deposit, ore types of the former are main graphite gneiss, graphite schist and graphitized marble, and ore types of the latter are main graphite layer metamorphosised from coal bed and graphitic carbargilite. At present, most graphite deposits with low research degree only implement preliminary investigations of the graphite resource, which has a good prospect. Based on the basic material of dozens of graphite deposits, spots and plays discovered in the Qinling orogen, this paper applied geologic multidisciplinary analysis method to disclose the graphite deposit types of the Qinling orogen, mainly through outdoors geologic survey and specimen examination with analysis of some typical deposits: regional metamorphism crystal graphite deposits and thermo-contact metamorphic aphanitic graphite deposits, with the control of latitudinally trending regional tectonic, graphite deposits of the Qinling orogen distribute sublatitudinally trending three large ore belts: I the Neoarchean–Proterozoic basement crystal graphite enrichment deposits zone along the south margin of North China plate; II the Carboniferous intermountain basin group aphanitic graphite enrichment deposits zone near the Shangdan suture of the West Qinling; III Paleozoic crystal graphite enrichment deposits zone in the Qinling paleomicroplate of the west part of the East Qinling.Conclusions are reached from multiple inquiries: Qinling multi-cycle complex continental collision orogen zone has experienced multiple tectonic framework transformation and polyphase tectonic thermal event from Neo Archean Erathem adjointing multiple graphite tectonic mineralization cycle. In the light of chief control of mineralization and ore types, each of the three large graphite deposits belts of the Qinling orogen has its own genesis: I graphite deposits enriched metallogenetic zone is that regional tectogenetic movement from Neo Archaean caused polyphase metapepsis, which superimposed up and reconstructed Neo Archean Erathem to Proterozoic basement, forming regional metamorphic big flake crystal graphite deposits; II graphite deposits enriched metallogenetic zone is that polyphase regional tectogenetic movement associated with multiple heating caused by multiphase igneous intrusion, which resulted in original coal layers emerging multiple thermo-contact metamorphisms and formed thermo-contact metamorphic aphanitic graphite deposits. III graphite deposits enriched metallogenetic zone is that Palaeozoic cap–rock experienced polyphase metapepsis, forming regional metamorphic finely flake crystal graphite deposits. Comprehensive research of metallogenetic mechanism in graphite deposits and its associated profitable deposits of the Qinling orogen is importance for future exploration.  相似文献   

Quantitative Characterization of Micropore Structure of Shale Reservoir     

LI Wenhao  LU Shuangfang  XUE Haitao  ZHANG Pengfei  HU Ying  LI Qian  ZHANG Han 《《地质学报》英文版》2015,89(Z1):63-64

<正>The scholars in the world are trying to discuss the micropore structure of shale reservoir using different kinds of methods(Mercury Injection,Nuclear Magnetic Resonance,Adsorption-Desorption,Scanning Emission Microscope,CT)when the shale oil and gas began to be effectively explored and be taken into account(Loucks et  相似文献   

Similarities and Differences between Marine and Continental Shale Gas     

XUE Song  LU Shuangfang  XUE Haitao  YANG Jinxiu  TANG Mingming  and LIU Shuang 《《地质学报》英文版》2015,89(Z1):288-289

<正>Shale is composed of the fine particle size less than0.0039mm debris,clay and organic matters(Zhou Wen,Wang Hao,2013).Having sheet bedding.Based on the formation of environment,divide the organic-rich shale into marine organic-rich shales,The continental coal organic-rich shales and the lake facies shales.The successful development of shale gas resources in oil and  相似文献