雨滴谱仪与风廓线雷达反射率对比试验   总被引：2，自引：2，他引：0  

汪学渊  阮征  李效东  黄丽芬  韩伟中 《气象》2016,42(1):107-114

针对风廓线雷达估算的反射率数据需要进行验证。开展雨滴谱仪与风廓线雷达反射率对比试验,通过两种不同探测设备观测数据的对比,以验证风廓线反射率数据的可靠性和可用性。结果表明:确定了以风廓线低模360~1440 m采样体积内的反射率与3 min雨滴谱反射率数据对比方法能最大程度的减少时空差异;在雨滴谱仪反射率小于40 dBz时,对应的风廓线雷达反射率数据是可靠和可用的;同时由于风廓线雷达有限的动态范围造成反射率低估的现象,使得风廓线雷达反射率在大气垂直结构以及微物理特性等方面应用受到一定的局限性。  相似文献   

辐射井技术在尾矿库降排水工程中的应用          下载免费PDF全文

阮茂盛  奚兴富  周晨晨 《探矿工程》2016,43(4):72-75

尾矿库是我国重大危险源之一,而尾矿库内的浸润线又是坝体安全的重要指标之一,为有效排出尾矿中的水,降低尾矿库内浸润线,本文通过辐射井技术在尾矿库降排水工程中应用的多个成功工程实例,归纳、总结并提出该技术在尾矿库应用过程中的设计思路、施工要点及工艺方法等。  相似文献   

塔中地区卡1三维区块奥陶系鹰山组台内滩的地震相特征与分布          下载免费PDF全文

张金虎  于炳松  祁昭林  白忠凯  阮壮  李丽冉 《沉积与特提斯地质》2016,36(3):104-112

塔里木盆地塔中地区奥陶系鹰山组是海相碳酸盐岩油气勘探的有利目标层位。为查明塔中地区卡1三维区块鹰山组台内滩储层的空间分布,基于大量的岩心、钻井、地震资料,通过井震对比,分析台内滩的地震反射特征,并在此基础上预测卡1区块内鹰山组台内滩的分布。研究认为,台内滩内部多具有高频无序反射,振幅的强弱变化明显,且不均匀,两翼地层厚度有较明显的变化,与相邻层位岩性有明显差异;在顶面和底面多具有宽、缓的透镜状或丘状地震反射波外形,台内滩附近的围岩,较明显地超覆或披覆在台内滩之上。在精细解释三维地震资料的基础上,利用地震属性,对鹰山组古地貌进行了恢复,预测卡1三维区块奥陶系鹰山组的台内滩有利发育区,为区内高能滩相储集层的评价奠定基础。  相似文献   

The August 27, 2014, rock avalanche and related impulse water waves in Fuquan,Guizhou, China   总被引：1，自引：1，他引：0  

Aiguo Xing  Qiang Xu  Yaoqiang Zhu  Jiliang Zhu  Yao Jiang 《Landslides》2016,13(2):411-422

At about 8:30 p.m. on 27 August 2014, a catastrophic rock avalanche suddenly occurred in Fuquan, Yunnan, southwestern China. This landslide and related impulse water waves destroyed two villages and killed 23 persons. The impulse waves occurred after initiation of the landslide, caused by the main part of the slide mass rapidly plunging into a water-filled quarry below the source area. The wave, comprising muddy water and rock debris, impacted the opposite slope of the quarry on the western side of the runout path and washed away three homes in Xinwan village. Part of the displaced material traveled a horizontal distance of about 40 m from its source and destroyed the village of Xiaoba. To provide information for potential landslide hazard zonation in this area, a combined landslide–wave simulation was undertaken. A dynamic landslide analysis (DAN-W) model is used to simulate the landslide propagation before entering the quarry, while Fluent (Ansys Inc., USA) is used to simulate the impulse wave generation and propagation. Output data from the DAN-W simulation are used as input parameters for wave modeling, and there is good agreement between the observed and simulated results of the landslide propagation. Notably, the locations affected by recordable waves according to the simulation correspond to those recorded by field investigation.  相似文献   

管状蠕虫Ridgeia piscesae TAK1的克隆及其转基因果蝇制备          下载免费PDF全文

赖庆娜  林鹭红  郭辉革  柯琳琳  阮灵伟  杨丽容  陈建明 《应用海洋学学报》2016,35(1):138-143

Ridgeia piscesae是唯一一种存在于东北太平洋Juan de Fuca Ridge热液区的管状蠕虫,我们成功通过RACE PCR获得Ridgeia piscesae TAK1(Rp TAK1)基因全长c DNA序列.为深入研究TAK1基因在管状蠕虫中的作用,本文通过显微注射获得Rp TAK1转基因果蝇,并在果蝇体内成功过表达Rp TAK1基因.我们发现由Rp TAK1编码的氨基酸序列具有一定保守性,可能暗示其功能上的保守性,同时也暗示TAK1蛋白在物种进化中的保守性.而过表达突变体果蝇的眼睛出现变异,包括眼睛变得粗糙、单眼排列不整齐及整体形状变小,可以看出Rp TAK1基因影响果蝇的机体发育,我们猜测在Rp TAK1基因在管状蠕虫的生长发育过程中也可能起到重要作用.  相似文献   

不同颜色青海软玉微观形貌和矿物组成特征   总被引：1，自引：1，他引：0  

于海燕  阮青锋  孙媛  李东升 《岩矿测试》2018,37(6):626-636

青海软玉颜色丰富,近年来对青海软玉矿物学的研究不少,但针对不同颜色青海软玉矿物学特征的研究还存在欠缺。本文利用偏光显微镜、扫描电子显微镜、电子探针及粉晶X射线衍射仪器,从透闪石微形貌特征、微观结构、矿物组成及结晶度四个方面,研究了青海软玉颜色与矿物学特征的对应关系。结果表明:白玉、烟青玉、糖玉中透闪石主要为纤维状,显微纤维变晶结构,结晶度为96. 12%～96. 88%;青白玉和翠青玉中透闪石主要为叶片状,显微叶片变晶结构,结晶度为97. 35%,97. 32%;青玉和碧玉中透闪石主要为叶片状,显微叶片-隐晶质变晶结构,结晶度为95. 48%,95. 29%;黄玉中透闪石主要为柱状,显微柱状变晶结构,结晶度为97. 84%。青海软玉主要组成矿物均为透闪石,含量在95%以上,部分次要矿物如翠青玉中的榍石、黄玉中的钙长石、青玉中的菱镁矿、碧玉中的铬铁矿、糖玉中的斜黝帘石只出现在特定颜色的青海软玉样品中。研究认为不同颜色青海软玉矿物学特征确实存在差异,这些特征为研究不同颜色青海软玉成矿环境及成矿条件提供了科学依据。  相似文献   

U-Pb Zircon and Re-Os Molybdenite Geochronology of theW-Mo Mineralized Region of South Qinling,China, andtheir Tectonic Implications     

HAN Ke  YANG Xingke  CHAO Huixi  HE Hujun  RUAN Shiqi  GAO Yunfeng  ZHANG Weisheng  ZHU Wei  JIN Gang 《《地质学报》英文版》2021,95(2):500-516

A W-Mo mineralized region is located along the northern margin of the South Qinling tectonic belt of China. WMo mineralization occurs mainly in Cambrian–Ordovician clastic and carbonate rocks, and the ore bodies are structurally controlled by NW–SE-and NNE–SSW-striking faults. Evidence for magmatism in the area is widespread and is dominated by intermediate–felsic intrusives or apophyses, such as the Dongjiangkou, Yanzhiba, Lanbandeng, and Sihaiping granitic bodies. Quartz-vein-type mineralization and fault-controlled skarn-type mineralization dominate the ore systems, with additional enrichment in residual deposits. At present, there are few or insufficient studies on(1) the age of mineralization,(2) the relationship between intermediate–felsic granite and W-Mo mineralization,(3) the source of ore-forming materials,and(4) the metallogenic and tectonic setting of the mineralized area. In this paper, we present geochronology results for numerous intrusive granitic bodies in the South Qinling tectonic belt. U-Pb zircon geochronology of the Lanbandeng monzogranite and Wangjiaping biotite monzogranite yields ages of 222.7 ± 2.3 and 201.9 ± 1.8 Ma, respectively. In contrast to the Late Triassic age of the Lanbandeng monzogranite, the age of the newly discovered Wangjiaping biotite monzogranite places it at the Triassic–Jurassic boundary. Re-Os molybdenite geochronology on the Qipangou W-Mo deposit yielded a model age of 199.7 ± 3.9 Ma, indicating the deposit formed in the early Yanshanian period of the Early Jurassic. Granitoid intrusions in the mineralized area are characterized by composite granite bodies that crystallized at ca.240–190 Ma. While there were multiple stages of intrusion, most occurred at 210–220 Ma, with waning magmatic activity at 200–190 Ma. The Re-Os age of molybdenite in the region is ca. 200–190 Ma, which may represent a newly discovered period of W-Mo metallogenesis that occurred during the final stages of magmatism. The heat associated with this magmatism drove ore formation and might have provided additional ore-forming components for metallogenesis(represented by the Wangjiaping biotite monzogranite). Ore materials in the mineralized area were derived from mixed crustal and mantle sources. Enrichment of the region occurred during intracontinental orogenesis in the late Indosinian–Yanshanian, subsequent to the main Indosinian collision. At this time, the tectonic environment was dominated by extension and strike-slip motion.  相似文献   

Electrical Structure of Wulingshan and Middle Jiangnan Orogen by Three-Dimensional Magnetotelluric Data Inversion     

RUAN Shuai  YAN Jiayong  ZHANG Kun  LV Qingtian 《《地质学报》英文版》2021,95(Z1):80-81

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海底天然气水合物层界面反射AVO数值模拟   总被引：18，自引：2，他引：16       下载免费PDF全文

阮爱国  李家彪  初凤友  李湘云 《地球物理学报》2006,49(6):1826-1835

本文采用AVO数值模拟方法,共选取水合物系统分层结构6个模型,对水合物、游离气和饱水沉积物接触界面的反射特征进行了数值模拟,研究了BSR及双BSR的存在条件与水合物体系垂向分布的关系,对一些现象从理论上进行了阐明.主要结论是：（1）强的似海底反射界面BSR与游离气体的存在密不可分,实际地震剖面中的“BSR”可能不对应水合物而只对应气体,无明显BSR的地方可能有水合物.（2）水合物顶部有可能存在游离气体,它可以在正常BSR（BSR1）之上形成另一个具有正极性的似海底反射界面BSR2.（3）正常BSR之下的双BSR（BSR0）其弹性机理有两种可能,一是水合物之下游离气上升迁移遇到某种阻隔层或不同气体组分的自然分层所造成的气体垂向分布的梯度性差异;二是当水合物之下的游离气体中存在残存的水合物时,同样会形成一定强度的似海底反射,在这种情形下BSR0的极性比较难以判断,取决于残存水合物上下游离气的饱和度和残存水合物的厚度.  相似文献   

Oxidation of AsⅢ by Several Manganese Oxide Minerals in Absence and Presence of Goethite     

FENG Xionghan  TAN Wenfeng  LIU Fan  Huada Daniel RUAN  HE Jizheng 《《地质学报》英文版》2006,80(2)

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