微/纳结构的弗雷德盐对铜的絮凝-吸附研究

以含钙聚合铝(PACCa)作为导向剂与铝源,在常温常压下合成了微/纳结构(微米/纳米尺度)的弗雷德盐。当水溶液中的ρ(Cu2+)为4.406 mg/L时,每升含铜溶液投入0.45 g弗雷德盐对Cu2+的去除率为99.02%。背散射(BEI)与二次电子(SEI)的SEM研究表明:微/纳结构的弗雷德盐在水处理中经历了溶解-结晶过程,XRD鉴定证实弗雷德盐分解后形成方解石晶体与无定形氧化铝。微/纳结构的弗雷德盐去除Cu2+的絮凝沉淀机理与吸附反应模式有所不同,弗雷德盐在絮凝过程中与水中CO2作用转变成方解石与无定形氧化铝,同时Cu2+在碱性环境下生成氢氧化物,新生成的无定型氢氧化铝迅速吸附铜的氢氧化物并裹挟方解石沉淀。     

2000年苏门答腊M_S8.0地震对缅甸M_S6.5地震动态应力触发作用及影响因素

根据地震动态触发理论,计算了2000年苏门答腊MS8.0,地震在缅甸MS6.5地震破裂面上产生的动态库仑应力:正峰值为1.357 5 MPa,负峰值为-1.113 5 MPa。峰值大于地震触发阈值0.01 MPa,苏门答腊地震的发生对缅甸地震具有一定的触发作用。在计算过程中发现,主震基本参数、传播过程中介质参数和被触发地震断层参数的准确性对计算结果有较大影响。     

广东从化石岭碱性杂岩的岩石学特征及其地质意义

对广东从化石岭碱性杂岩体进行了１：１万地质调查和填图,并进行了详细的岩石力学研究。其结果表明：杂岩体由霞石角闪石正长岩、角闪石正长岩、墨云母正长岩等岩性组成,为Ａ－型花岗岩的分异结晶作用所形成,产于板内引张构造环境,与深大断裂有关。岩体本身已构成霞石正长岩矿床,具有较高的工业利用和经济价值。     

工程勘察数据的传递控制与可视化

从广义说,工程勘察成果中的很大一部分是通过大量数据的传递与处理取得的。数据传递结构的优化和合理控制是提高勘察效率和质量的保证。讨论了用程序编制的方法实现的数据从平面图到剖面图的钻孔距离传递,利用模糊聚类思想提出的对剖面数据进行合并的建议和利用地质三维软件实现的三维地质体模型的耦合展示,这几个问题正是目前大多勘察单位在数据控制与传递流程中可能欠缺的环节。     

初始中主应力系数对中密粉煤灰动模量阻尼比影响的试验研究

利用土工静力-动力液压三轴-扭转多功能剪切仪,开展了在三向非均等固结状态下的饱和中密粉煤灰循环扭剪试验。着重探讨了初始中主应力系数对饱和中密粉煤灰的动模量和阻尼比特性的影响。试验结果表明：初始中主应力系数对粉煤灰动剪切模量有一定的影响,对阻尼比没有影响。根据仪器量测系统的特点,采用了大小位移计联合测量角位移的方法,不仅能够提高测试精度,而且能够获得完整的动模量和阻尼比随动剪应变幅值的变化过程。     

在二调数据库中统计指定范围内地类面积的方法

全国第二次土地调查数据库利用以后,城市建设用地审批、大型的线状用地、土地复垦、矿山治理等工程的前期可研及预审工作等基本都以二调数据为基础数据。将正确的用地红线用ArcGis软件处理成面文件(.Shp),然后把处理后的.shp文件复制到二调数据库里的KCDJ层里。再使用农村土地调查专用软件导出各级用地面积汇总表。通过文中介绍的方法,可以实现快速、准确的制作指定范围的各种地类面积表。     

Late Mesozoic compressional to extensional tectonics in the Yiwulüshan massif,NE China and their bearing on the Yinshan–Yanshan orogenic belt: Part II: Anisotropy of magnetic susceptibility and gravity modeling

Granitoids play an important role in deciphering both crustal growth and tectonic evolution of Earth. In the eastern end of the Yinshan–Yanshan belt of North China Craton, the Yiwulüshan massif is a typical region that presents the tectonic evolution features of this belt. Our field work on the host rocks has demonstrated two phases of opposite tectonics: compressional and extensional, however, the deformation is almost invisible in the intrusive rocks. To improve the understanding of the tectonic evolution of the Yiwulüshan massif and the Late Mesozoic tectonics of East Asia, a multidisciplinary study has been carried out. In this study, anisotropy of magnetic susceptibility (AMS) and gravity modeling have been applied on these Jurassic plutons (Lüshan, Jishilazi and Guanyindong), which intrude into the Yiwulüshan massif. According to laboratory measurements and microscopic observations on thin sections, the AMS of the Yiwulüshan massif is characterized by secondary fabrics, indicating that the intensive post solidus deformation has reset the (primary) magmatic magnetic fabrics. A relatively gentle NW dipping magnetic foliation has been identified with two distinct groups of magnetic lineations of N34°E and N335°E orientations, namely L_M1 and L_M2, relatively. Gravity modeling reveals a southward thinning of the massif with a possible feeding zone rooted in the northern part of the massif. Integrating all results from structural observation, geochronological investigation, AMS measurement and gravity modeling, two tectonic phases have been identified in the Yiwulüshan massif, posterior to the Jurassic (180–160 Ma) magmatism in the Yinshan–Yanshan area. The early one concerns a Late Jurassic–Early Cretaceous (~ 141 Ma) compressional event with a top-to-the-south to southwest sense of shear. The second one shows an Early Cretaceous (~ 126 Ma) NW–SE ductile extensional shearing. At that time, sedimentary basins widened and Jurassic plutons started to be deformed under post solidus conditions. In fact, the NW–SE trend of the maximum stretching direction is a general feature of East Asian continent during Late Mesozoic.     

立井变形监测与治理

针 对 我国 部 分 统 配煤 矿 立 井 变形 情 况 ,介 绍 了 立井 破 坏 和 变形 两 种 类 型的 原 因 、预 计 方 法 、监 测 方法 及 治 理方 案,对于 立 井的 变形 监 测与 治理 工 作具 有一 定 的借 鉴意 义 。     

Ultrahigh-pressure metamorphism in the forbidden zone: the Xugou garnet peridotite, Sulu terrane, eastern China

The Xugou garnet peridotite body of the southern Sulu ultrahigh‐pressure (UHP) terrane is enclosed in felsic gneiss, bounded by faults, and consists of harzburgite and lenses of garnet clinopyroxenite and eclogite. The peridotite is composed of variable amounts of olivine (Fo₉₁), enstatite (En_92?93), garnet (Alm_20?23Prp_53?58Knr_6?9Grs_12?18), diopside and rare chromite. The ultramafic protolith has a depleted residual mantle composition, indicated by a high‐Mg number, very low CaO, Al₂O₃ and total REE contents compared to primary mantle and other Sulu peridotites. Most garnet (Prp_44?58) clinopyroxenites are foliated. Except for rare kyanite‐bearing eclogitic bands, most eclogites contain a simple assemblage of garnet (Alm_29?34Prp_32?50Grs_15?39) + omphacite (Jd_24?36) + minor rutile. Clinopyroxenite and eclogite exhibit LREE‐depleted and LREE‐enriched patterns, respectively, but both have flat HREE patterns. Normalized La, Sm and Yb contents indicate that both eclogite and garnet clinopyroxenite formed by high‐pressure crystal accumulation (+ variable trapped melt) from melts resulting from two‐stage partial melting of a mantle source. Recrystallized textures and P–T estimates of 780–870 °C, 5–7 GPa and a metamorphic age of 231 ± 11 Ma indicate that both mafic and ultramafic protoliths experienced Triassic UHP metamorphism in the P–T forbidden zone with an extremely low thermal gradient (< 5 °C km^?1), and multistage retrograde recrystallization during exhumation. Develop of prehnite veins in clinopyroxenite, eclogite, felsic blocks and country rock gneiss, and replacements of eclogitic minerals by prehnite, albite, white mica, and K‐feldspar indicate low‐temperature metasomatism.     

A three dimensional model of muckpile formation and grade boundary movement in open pit blasting

Summary Formulation and case studies of a three dimensional kinematic model are presented. Thein situ overburden geometry can be simulated accurately and various initiation patterns of blasts can be modelled. The overburden geometry, hole patterns and explosive distribution are all explicit model inputs. Because the effect of explosive properties, rock mass condition and inter-row delay are very difficult to measure in terms of blast performance, these are represented in the model by control parameters which are left for calibration using field data. The output of the model is a three dimensional muckpile shape of any cross section and a contour map of grade distribution within the muckpile. Two case studies are presented which have shown that the model is a valuable tool for optimizing production blasting as well as for controlling grade dilution during blasting.