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Search Results: 1 - 10 of 61652 matches for " 毛彦龙 "
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云南个旧白沙冲和北炮台花岗岩岩石学、地球化学研究及成因探讨
李肖,景文,
地质论评 , 2011,
Abstract: 白沙冲岩体和北炮台岩体均位于个旧矿田的东区北段。白沙冲岩体岩性主要为黑云母花岗岩,而北炮台岩体岩性主要为似斑状黑云母花岗岩。本文通过对白沙冲岩体、北炮台岩体进行岩石学、地球化学、Nd、Sr同位素研究,厘定白沙冲岩体属过铝质的高钾钙碱性花岗质岩石,北炮台岩体属准铝质的钾玄岩系列花岗岩。两岩体均表现出亏损Ba、Sr、Nb、P、Ti,富集Rb、Pb、U的特点。白沙冲岩体稀土总量较低,轻重稀土分馏不明显,具强烈的铕负异常,且具有类似于M型的四组分效应;相对于白沙冲岩体,北炮台岩体稀土总量较高,轻重稀土分馏较明显,具中等程度的铕负异常。Nd同位素结果显示,两岩体均来源于大陆地壳。地球化学特征表明,两岩体在岩浆演化过程中均经历了结晶分异,且白沙冲岩体的分异演化程度较高。区域内同时代花岗岩的相关资料表明,滇东南―桂西一带在晚白垩世存在大规模的岩浆活动―成岩事件,可能为晚中生代华南岩石圈伸展背景下的产物。
个旧卡房层状铜矿床金云母和云英岩化白云母40Ar-39Ar同位素年龄及意义
张娟,景文,,李肖
矿床地质 , 2012,
Abstract: 在个旧锡铜多金属矿集区发育有矽卡岩型和热液脉型等锡铜矿化体,其形成时代是晚白垩世,属与花岗岩有关的岩浆热液成因矿床。赋存于三叠纪蚀变玄武岩层中,呈(似)层状的铜矿体的精确年龄尚未有报道,成因仍备受争议。文章选择赋存于卡房矿田蚀变玄武岩层中,呈(似)层状分布的铜矿体中的金云母,及新山岩体接触带云英岩中的白云母为研究对象,利用40Ar-39Ar阶段加热同位素定年方法对它们进行了年代学研究,获得了金云母和白云母的40Ar-39Ar同位素坪年龄分别为(79.55±0.47)Ma和(79.53±0.57)Ma,对应等时线年龄分别为(79.8±1.3)Ma和(79.7±1.0)Ma,反等时线年龄分别为(79.7±2.0)Ma和(79.61±0.75)Ma,两者年龄基本一致。结合矿物共生组合特征和流体包裹体测温资料,认为金云母的坪年龄(79.55±0.47)Ma,可以代表卡房蚀变玄武岩中(似)层状铜矿的形成时代,而白云母的坪年龄(79.53±0.57)Ma,则代表新山岩体形成后期岩浆热液活动的年龄。这2个年龄与个旧锡铜多金属矿床的成矿时代基本一致,应是同一构造-岩浆-流体活动形成的成矿系列产物。
Mineralization process of the Kafang tin-copper deposit in the Gejiu district, Yunnan Province: Constraints from fluid inclusion
云南个旧卡房矿田锡-铜矿床成矿作用过程探讨:成矿流体约束

ZHANG Juan,MAO JingWen,CHENG YanBo,LI XiaoLong,
张娟
,景文,,李肖

岩石学报 , 2012,
Abstract: The Gejiu polymetallic tin ore district,located in Yunnan Province,is the largest tin deposit over the world.The Kafang copper(tin)deposit is one component of it,characterized by enriched copper.There are two main kinds of ore-body in Kafang copper deposit.One is stratiform-like ore-body,and the other is contact ore-body.In this paper we carried out fluid inclusion study and isotope geochemistry analysis of the former kind ore-body,as well as the latter kind with isotope geochemistry analysis.The mineralization in the deposit can be divided into three stages,i.e.quartz-pyrrhotite-chalcopyrite stage(Ⅰ),quartz-calcite-chalcopyrite-pyrite stage(Ⅱa)and quartz-calcite stage(Ⅱb).The ore-forming fluids of the three stages physical-chemically changed from moderate-high temperature(363.9℃in average),moderate salinity(20.1 8%NaCleqv in average)and low density(0.854g/ cm3in average)via moderate temperature(283.2℃in average),moderate-low salinity(1 2.59%NaCleqv in average)and low density(0.863 g/cm3 in average)to low temperature(1 85.0℃in average),low salinity(1 1.97%NaCleqv in average)and low density(1.001 g/cm3 in average).The Laser Raman data of the ore-forming fluid inclusions shows that it is rich of H 2 O,CH 4 in gas phase,and H 2 O,CO 3 2- in liquid phase.Hydrogen isotope analysis and oxygen isotope analysis(δD H2O lies between-98‰~-79‰;δ18 O H2O lies between-0.82‰~7.09‰)show that the ore-forming fluid dominated by magmatic water in the early stage, but in late stage,it could be produced by mixing magmatic and meteoric water.The compositions of sulfur isotope show that sulfur of stratiform-like ore-body(δ34 S lies between-0.86‰~3.8‰)was derived from Triassic basalt lava.Both Triassic basalt lava and Yanshanian granite provide sulfur for the ore-forming process(δ34 S lies between-3.2‰~6.2‰).
Petrogenesis of the Gaofengshan granite in Gejiu area, Yunnan Province: Zircon U-Pb dating and geochemical constraints
云南个旧高峰山花岗岩成因:锆石U-Pb年代学及地球化学约束

LI XiaoLong,MAO JingWen,CHENG YanBo,ZHANG Juan,
李肖
,景文,,张娟

岩石学报 , 2012,
Abstract: The Gaofengshan granite is located in the eastern part of the Gejiu ore district,Yunnan Province.The lithology of the granitoid is mainly medium grained biotite monzonitic granite.In this paper,zircon U-Pb dating and geochemistry of the Gaofengshan granite is studied to constrain its geochronology and petrogenesis.Zircon LA-ICP-MS dating yields an emplacement age of 85.76±0.58Ma,which suggests that this granite formed in the Late Cretaceous.Geochemically,this granite is silica riched in composition, with high content of alkali(Na 2 O+K2 O).It’s a metaluminous to peraluminous granite and belongs to the high-K calc-alkaline series, and characterized by enrichment of Rb,U,Ta,Pb,Nd and depletion of Ba,Nb,Sr,P,Zr,Eu,Ti.The abundance of∑REE varies in the range of 146.7×10 -6 to 236.1×10 -6 ,and it has intensely negative Eu abnormality(δEu=0.03~0.11).What’s more,it reflects a tetrad-like effect with a shape of"M".These features are coincident with A2 granite.Geochemical characteristics show that the parental magma of the Gaofengshan granite was derived from the partial melting of crust,and experienced a strong crystal fractionation process.New data of this study indicate that the Gaofengshan granite was one component of the large scale Late Cretaceous magmatism in western Cathaysia block,which viewed as under a regional lithospheric extension tectonic setting.
低温变黄与干筋烘烤工艺对中上部烟叶质量的影响
詹军,张晓,周芳芳,春堂,李晓亚,包崇,宫长荣
河南农业科学 , 2012,
Abstract: 为了优化与改进密集烤房烘烤工艺,以现行三段式烘烤工艺为对照(CK),研究了低温变黄与干筋烘烤工艺(即增加35℃和60℃稳温时间,低温65℃干筋)对中、上部烟叶外观质量、化学成分、香气物质和评吸质量的影响。结果表明,低温烘烤工艺对不同部位烟叶质量的影响有所不同。上部烟叶的外观质量、化学成分协调性和感官评吸质量在该工艺下得到了较为突出的改善,其致香物质总量、质体色素降解产物、苯丙氨酸类香气物质、类西柏烷类物质和其他类香气物质的含量分别较CK显著增加了36.93%、24.66%、52.48%、92.18%、64.78%。该工艺一定程度上提高了上部烟叶的质量,但是对中部烟叶质量的改善效果较为一般。
密集烤房与普通烤房烤后烟叶香气质量的对比分析
詹军,张晓,周芳芳,王柱石,春堂,包崇,吕凯,王超
河南农业科学 , 2013,
Abstract: 为挖掘和借鉴不同类型烤房在改善烟叶香气质量方面的优势,给密集烤房和配套烘烤工艺的发展和优化提供依据,对比分析了密集烤房(三棚)、密集烤房(四棚)和普通烤房烤后烟叶致香物质含量、比例及感官评吸质量的差异。结果表明,普通烤房烤后烟叶质体色素降解产物、类胡萝卜素降解产物、苯丙氨酸类致香物质、类西柏烷类致香物质、致香物质总量以及除新植二烯外致香物质的总量分别较三棚密集烤房和四棚密集烤房提高了15.28%、11.46%,47.56%、36.19%,19.04%、15.60%,20.16%、2.10%,14.66%、11.28%,16.75%、18.16%,而三棚密集烤房比较有利于美拉德反应产物和其他类致香物质的形成与积累,四棚密集烤房的大部分致香物质含量要高于三棚密集烤房;普通烤房烤后烟叶类胡萝卜素降解产物所占的比例显著高于密集烤房中该物质所占的比例,密集烤房(三棚)烤后烟叶美拉德反应产物所占的比例极显著高于另2个处理,大部分致香物质所占的比例在不同处理间差异不显著,而且普通烤房烤后烟叶的感官评吸质量和整体使用价值好于2种密集烤房。可见,普通烤房在改善烤后烟叶香气质量方面有着明显的优势,可通过深入挖掘其烘烤机制来指导密集烤房及烘烤工艺的优化和完善。
甲硫基嘧啶-5-羧酸乙酯衍生物的绿色氧化 Green Oxidation of(Methylthio)Pyrimidine-5-Carboxylate Derivatives
杨亮茹,王海涛,,买文鹏,,袁金伟,肖咏梅
- , 2016,
Abstract: (S)-4-(3-氯-4-甲氧基苄氨基)-2-(2-羟甲基-1-吡咯烷基)-5-嘧啶甲酸乙酯(3)是合成阿伐那非的关键中间体之一。以钨酸钠为催化剂,H2O2氧化4-(3-氯-4-甲氧基苄氨基)-2-甲硫基-5-嘧啶甲酸乙酯(1),得亚砜(2a)与砜(2b)的混合物,再与L-脯氨醇反应得到(S)-4-(3-氯-4-甲氧基苄氨基)-2-(2-羟甲基-1-吡咯烷基)-5-嘧啶甲酸乙酯(3);研究了氧化剂用量、催化剂用量、溶剂、反应温度等因素对反应的影响,利用响应面设计实验方案进行优化,得出最佳工艺条件,验证实验与优化结果相符。产物结构经~1H-NMR、~(13)C-NMR、ESI-MS、FT-IR等表征及分析予以确认。
应用RAPD分析1个抗条锈病的小麦-黑麦易位系

科学通报 , 1994,
Abstract: 随机扩增的多态性DNA(RAPD)分析是近年来发展起来的以多聚酶链式反应(PCR)为基础的一项新方法.它通过短引物(通常含9—10碱基)和模板间在较低的退火温度下配对,引发在基因组若干位点的DNA扩增,获得产物.RAPD技术快速,易行,只需少量的DNA,因而在许多领域得到应用,条锈病是我国北方麦区危害较为严重的病害之一,尤其是近年随着新的生理小种条中28,29的出现,使得原来抗条锈的洛夫林10,13号等1B/1R代换系或易位系的抗性逐渐丧失,因而急需新的抗条锈病品种.本文报道利用RAPD方法对1个新的抗条锈病的小麦-黑麦易位系进行了分析,同时还讨论了RAPD技术的某些局限性.
THE STABILITY EVALUATION AND DESIGN OF THE HIGH SLOPE AT LIANYUNGANG NUCLEAR POWER STATION
连云港核电站高边坡稳定性评价与设计

Su Shengrui,Li Tonglu,Mao Yanlong,Du Dongju,Peng Jianbing,
苏生瑞
,李同录,,杜东菊,彭建兵

岩石力学与工程学报 , 2000,
Abstract: A high slope with a length over 400 meters will be formed at the Lianyungang nuclear power station after the second period of engineering excavation. After systematically analyzing the engineering geological conditions, the stability of the slope is evaluated by means of engineering comparison and pole projection in corporation with limiting equilibrium method and two-dimensional and three-dimensional finite element method, and the slope design plan is also made.
多孔分洪闸调度方案优化探讨——以洞庭湖澧南垸为例
Porous Floodgate Control Optimization Study: A Case Study on Linan Poler of Dongting Lake
 [PDF]

李志, 德华
Journal of Water Resources Research (JWRR) , 2014, DOI: 10.12677/JWRR.2014.32023
Abstract: 闸门启闭是水闸控制运用的关键。而科学合理的闸门控制调度方案,对于实现最好的分洪效果,保障闸门安全,有着十分重要的意义。以澧水津市站1998年及2003年洪水过程为基础资料,通过同频率控制放大得到设计洪水过程。对现有调度方案进行了评价,结果表明,现有调度方案分洪效果并不理想。根据最大削峰准则与最小成灾历时准则建立了澧南垸洪水闸优化调度目标函数及约束条件。依据所建目标函数,以频率5%的设计洪水过程线为例,制定了洪水闸优化调度方案。对所制定调度方案进行了评价,分析表明,此调度方案能达到较好分洪效果和安全保障
Opening and closing is the key of floodgate control and application. Scientific and reasonable control scheme, to achieve the best flood diversion effect and ensure gate security, has very important significance. According to the 1998 and 2003 flood process data of Li river of Jinshi hydrological station, through the same frequency control amplifier, design flood process is obtained. The scheduling scheme is evaluated, and results show that, the existing scheduling scheme of flood diversion effect is not good. Floodgate optimization objective function has been established. On the basis of the objective function, with a frequency of 5% of the designed flood hydrograph for example, a floodgate optimization control scheme has been developed. Analysis shows that the floodgate control scheme can achieve better flood diversion effect and safety.
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