Hydrodynamic Effect of the Regulation Project of Yangtze River Deepwater Channel Downstream of Nanjing

A two-dimensional flow numerical model of the tidal reaches, which total length is more than 700 km, is established from Datong to the Yangtze River estuary. The tidal levels, velocities, diversion ratios and dynamic axes before and after the separate regulation of each reach and combined regulation of all reaches are obtained. The comparative analysis shows that the regulation project of a separate reach basically has no impact on velocity distributions and variations of diversion ratios of upper and lower reaches, the variations of dynamic axes are only within the local scope of the project. The regulation project of a separate reach also has less impact on the water level in the lower adjacent reaches, but will make the water levels in the upper reaches rise. After the implementation of the regulation projects for all reaches, the rise of water level in the upstream reaches will have a cumulative impact.     

Reprocessing 12-yr Microwave Humidity Sounder Historical Data of Fengyun-3 Satellites

Atmospheric water vapor is an essential climate variable (ECV) with extensive spatial and temporal variations. Mi- crowave humidity observations from meteorolog...     

木吉村铜（钼）矿床地质特征

河北省涞源县木吉村铜（钼）矿床目前已探明为一大型斑岩型铜（钼）_矽卡岩型铁铜-热液脉型铅锌银“三位一体”多金属矿床。作者结合最新勘查成果,对该矿床的成矿地质背景、矿床地质特征进行了总结,探讨了该矿床的成因和成矿模式。研究表明,木吉村铜（钼）矿床位于山西断窿与燕山台褶带的过渡地带,乌龙沟_上黄旗深断裂带中。该矿床的主要控矿构造为F4断裂,成矿母岩闪长玢岩与古火山构造关系密切。该矿床具有典型的面型蚀变分带及矿化分带。其矿床成因主要为斑岩-矽卡岩型高（中）温热液矿床,以“多位一体”和多阶段成矿为特点。     

斑岩铜钼矿床成矿流体的出溶、演化与成矿:以大兴安岭南段敖仑花矿床为例

本文报道了大兴安岭南段敖仑花斑岩铜钼矿床中斑状石英的一些新发现。通过对其结构、成因和内部流体包裹体的研究,反演初始成矿流体性质;结合热液期脉系特征,探讨流体从出溶到成矿的演化过程。斑状石英包括"单颗粒石英"和"多晶石英集合体",以普遍发育含子矿物流体包裹体为特征,为岩浆-热液过渡期的特有产物。流体包裹体研究显示敖仑花矿床初始成矿流体具有高温高盐度特征,为H2O、CO2和Na-K-Ca-Fe-Cu-Ti等元素组成的络合物体系,在压力≥115MPa、深度≥4.3km条件下可出溶出温度≥492℃、盐度达到47.6%～58.7%NaCleqv的流体。热液期成矿系统压力突然降低导致流体发生沸腾,同时伴随温度骤减是引发大规模成矿的主要机制。根据矿物在脉系中的发育情况和显微测温数据,将辉钼矿的析出温度限定在335℃以上,即代表以辉钼矿沉淀为峰期成矿标志的主成矿温度下限。斑状石英中流体包裹体研究揭示敖仑花矿床形成到至今抬升高度约≥4.3km,暗示区域最小平均隆升剥蚀速率为32.6m/Ma。斑岩体中斑状石英不仅可以作为流体出溶的标志判断岩体是否具有成矿潜力,指导斑岩型矿床找矿工作,还能够为区域地质演化提供重要约束。     

Design and Experimental Study of A Pile-Based Breakwater Integrated with OWC Chamber

A structure scheme of a pile-based breakwater with integrated oscillating water column(OWC) energy conversion chamber was proposed, and four structure forms had been designed. Based on the physical test, the variations of the reflected wave height, the transmitted wave height, the air velocity at the outlet of the chamber, the air pressure and the wave height in the air chamber were studied under the conditions of different wave heights, periods, with or without elliptical front wall and the baffles on both sides of the chamber. Moreover, based on the results, the changes and relationship between the wave-eliminating effect and energy conversion effect of the scheme were analyzed. In general, it turns out, the transmission coefficients of the four structure forms are kept below 0.5. Furthermore, the transmission coefficients of the structural forms G2, G3, and G4 were all smaller than 0.4, and it is only 0.1 at its smallest. Thereinto, in general, the structure form G4 has the best wave-eliminating and energy conversion performance. At the same time, when the wave steepness is 0.066, the energy conversion and wave dissipation effect of the four structure forms is the best. The research results could be provided as the reference for the design structure selection of pile-based breakwater with integrated OWC energy conversion chamber.     

布隆湖水化学成分的形成机制

在对研究区地质及水文地质条件进行分析的基础上,根据对各类水样水质资料的分析,得出与补给水相比,布隆湖水中各组分含量普遍升高、TDS显著增大、水化学类型由HCO3·Cl型变为Cl·SO4·HCO3型、水质由良好的饮用水变为多种组分含量超标的不可饮水;认为布隆湖水的化学成分是在补给水化学成分的基础上,经过蒸发浓缩作用、溶解/沉淀及阳离子交替吸附作用而形成的.使用离子比值分析方法,估算出河水进入布隆湖后,蒸发比例高达71.43%,使各组分含量增大了约3.5倍;质量平衡模拟结果表明,形成湖水化学成分的主要化学作用是岩盐、石膏的溶解、方解石的沉淀以及CO2的逸出,此外还发生了少量的阳离子交替吸附作用.     

传统村落人居环境有机更新：理论认知与实践路径

新型城镇化背景下,中国传统村落人居环境面临着严重的人地关系危机,对其进行有机更新显得尤为重要。立足于有机更新的科学内涵及传统村落人居环境系统的演变特征,辨析了传统村落人居环境有机更新的理论认知,进而构建了传统村落人居环境有机更新的路径机制。研究结果表明：① 将传统村落人居环境系统的问题困境归类为物质空间、文化空间与社会空间,提出以三生空间为空间载体、景观基因为文化核心、社会场域为基础脉络的传统村落人居环境有机更新理论认知。② 以更新优化物质空间、文化空间与社会空间为着力点,构建了传统村落人居环境有机更新“物质-文化-社会”三维路径机制,包括物质空间更新：主导功能优化与三生空间重塑;文化空间更新：隐性基因修复与显性基因修补;社会空间更新：关系网络织补与社会秩序重构。以实现传统村落人居环境可持续发展为目标,通过建立“多维度优化-多目标统筹”的传统村落人居环境有机更新理论与路径,以期为中国传统村落人居环境有机更新提供科学参考与实践借鉴。     

吉林和龙长仁铜镍矿区含矿橄榄辉石岩年代学 及其地质意义

长仁铜镍矿床位于华北克拉通铜镍硫化物矿床成矿带-吉黑成矿亚带,为一处岩浆硫化物矿床,成矿作用与镁铁质-超镁铁质岩体密切相关。文章对吉林省长仁铜镍矿区Σ11基性-超基性岩体中橄榄辉石岩进行了锆石LA-ICP-MS U-Pb年代学的研究,获得谐和年龄为(226±1)Ma,为印支晚期,限定长仁铜镍矿成岩成矿时代为晚三叠世,与红旗岭、漂河川、茶尖岭等矿床为同期岩浆活动的产物。结合区域内前人研究成果,认为古亚洲洋最终闭合时间为晚二叠世到早三叠世,晚三叠世已进入古亚洲洋闭合后伸展环境,长仁矿区成岩成矿大地构造背景为古亚洲洋闭合后的造山后伸展环境。     

Geochemistry, Geochronology, and Hf isotopic Composition of the Late Paleoproterozoic Lujiapuzi Formation, NE Yan-Liao Rift, Northern Liaoning

The metasedimentary Lujiapuzi Formation crops out along the northeastern margin of the North China Craton, close to the Yan-Liao Rift. The age and tectonic setting of the formation, and its relationship with the Yan-Liao Rift are currently unclear. Here we present detrital zircon U-Pb ages, and Hf isotopic and geochemical data for the Lujiapuzi Formation to constrain the timing of deposition, the provenance of the formation, and the regional stratigraphy relationship. Zircon U-Pb dating constrains the timing of deposition of the Lujiapuzi Formation to younger than 1780 Ma, and indicates that most grains were sourced from the Longgang Block and the Paleoproterozoic Liao-Ji Belt. Detailed field investigations and a correlation of the regional stratigraphy reveal that much of the Lujiapuzi Formation is equivalent to the Tuanshanzi Formation in the Yan-Liao Rift; the lower section may represent the earliest sediments deposited within the Fanhe Basin. Based on these results and the findings of previous studies, we suggest that the base of the Changcheng System has an age of 1.80 Ga. Zircon Hf isotopic data indicate that the main period of crustal growth along the northeastern margin of the North China Craton occurred at 3.2–2.5 Ga, with a peak at 2.9–2.7 Ga.