山东乳山英格庄金矿床地质特征及成因浅析

英格庄金矿为胶东牟平-乳山成矿带上的一个中型金矿床。该矿床矿体严格受金牛山断裂带控制,呈脉状、透镜状和囊状平行斜列式产出;矿体平均厚1．58～1．98m,平均品位3．96×10^-6～4．77×10^-6。矿石类型主要为黄铁矿石英脉型;矿石中金属矿物主要为银金矿、自然金、黄铁矿等。围岩蚀变包括绢云母化、硅化、绿泥石化、黄铁矿化等。研究表明,英格庄金矿床为一中低温热液脉型金矿,属Groves等提出的造山型金矿范畴。     

Challenges in developing China's marine protected area system

Since the 1980s, there have been continuous increases in the coverage of marine protected areas (MPAs) in China, and a total of 158 MPAs have been declared. The MPA system in China is characterized by (1) decentralised designation and management with reduced control from the central government; (2) a dominance of de jure fully protected MPAs that are often implemented as de facto multiple-use areas; and (3) a lack of objective evaluation processes. To improve China's MPA system requires an appropriate integration of fully protected and multiple-use MPAs, and an approach that balances the advantages of top-down and bottom-up approaches.     

Decomposition analysis on direct material input and dematerialization of mining cities in Northeast China

Material dematerialization is a basic approach to reduce the pressure on the resources and environment and to realize the sustainable development. The material flow analysis and decomposition method are used to calculate the direct material input (DMI) of 14 typical mining cities in Northeast China in 1995-2004 and to analyze the demateri-alization and its driving factors in the different types of mining cities oriented by coal, petroleum, metallurgy and multi-resources. The results are as follows: 1) from 1995 to 2006, the increase rates of the DMI and the material input intensity of mining cities declined following the order of multi-resources, metallurgy, coal, and petroleum cities, and the material utilizing efficiency did following the order of petroleum, coal, metallurgy, and multi-resources cities; 2) during the research period, all the kinds of mining cities were in the situation of weak sustainable development in most years; 3) the pressure on resources and environment in the multi-resources cities was the most serious; 4) the petro-leum cities showed the strong trend of sustainable development; and 5) in recent years, the driving function of eco-nomic development for material consuming has continuously strengthened and the controlling function of material utilizing efficiency for it has weakened. The key approaches to promote the development of circular economy of min-ing cities in Northeast China are put forward in the following aspects: 1) to strengthen the research and development of the technique of resources' cycling utilization, 2) to improve the utilizing efficiency of resources, and 3) to carry out the auditing system of resources utilization.     

长营岭—龙门冲原生晕异常及找矿预测

通过对珊瑚矿田长营岭－龙门冲地区岩石地球化学测量,圈定了该区Ｗ、Ｓｎ、Ｃｕ、Ｚｎ、Ａｓ、Ｂ、Ｆ等元素异常,原生晕严格受ＮＥ和ＮＷ两组断裂控制。综合评价认为处于长营岭钨锡矿带南延带的南风井多元素组合异常是矿异常,该异常明显地受ＮＥ（Ｆ９）断裂和ＮＷ（Ｆ１０）断裂控制,浓集中心位于Ｆ９断裂下盘,与长营岭矿区矿体在ＮＷ断裂下盘富集的规律相同。测区内,异常形态与北区具连续性,异常强度弱于北区,组分分带显示以隐伏花岗岩为成矿中心,但沿矿带由ＮＥ到ＳＷ并无明显的组分分带和元素组合变化,矿田内不仅矿带南延并向ＳＷ方向倾伏,而且很有可能深部隐伏花岗岩体亦分枝向南延伸。     

Predicting TBM penetration rate in hard rock condition: A comparative study among six XGB-based metaheuristic techniques

A reliable and accurate prediction of the tunnel boring machine(TBM) performance can assist in minimizing the relevant risks of high capital costs and in scheduling tunneling projects.This research aims to develop six hybrid models of extreme gradient boosting(XGB) which are optimized by gray wolf optimization(GWO), particle swarm optimization(PSO), social spider optimization(SSO), sine cosine algorithm(SCA), multi verse optimization(MVO) and moth flame optimization(MFO), for estimation of the TBM penetration rate(PR).To do this, a comprehensive database with 1286 data samples was established where seven parameters including the rock quality designation, the rock mass rating, Brazilian tensile strength(BTS), rock mass weathering, the uniaxial compressive strength(UCS), revolution per minute and trust force per cutter(TFC), were set as inputs and TBM PR was selected as model output.Together with the mentioned six hybrid models, four single models i.e., artificial neural network, random forest regression, XGB and support vector regression were also built to estimate TBM PR for comparison purposes.These models were designed conducting several parametric studies on their most important parameters and then, their performance capacities were assessed through the use of root mean square error, coefficient of determination, mean absolute percentage error, and a10-index.Results of this study confirmed that the best predictive model of PR goes to the PSO-XGB technique with system error of(0.1453, and 0.1325), R~2 of(0.951, and 0.951), mean absolute percentage error(4.0689, and 3.8115), and a10-index of(0.9348, and 0.9496) in training and testing phases, respectively.The developed hybrid PSO-XGB can be introduced as an accurate, powerful and applicable technique in the field of TBM performance prediction.By conducting sensitivity analysis, it was found that UCS, BTS and TFC have the deepest impacts on the TBM PR.     

河台金矿断层岩的地质地球化学特征及其与金矿化的关系

摘要本文论述了河台金矿区断层岩的类型及其地质和地球化学特征,探讨了糜棱岩带与金矿化的关系,指出剪切应变强度和石英动态重结晶发育程度与金矿化强度密切相关.     

Mineral Chemistry of Clinopyroxenes in Mantle-Derived Inclusions in Cenozoic Basalts from Eastern China and Their Geological Significance

In this paper, 183 chemical analyses of clinopyroxenes are collected from mantle-derived inclusions inCenozoic basalts of eastern China. Through synthetic studies of the relevant data, their mineral chemistry andgeological significance are discussed. Based on the composition fo clinopyroxenes the authors conclude that theCenozoic upper mantle in eastern China is of the continental, primitive, metasomatic and high-temperaturetypes and is related to rift structural environment and variation in composition of basalts. The geobarometry ofclinopyroxenes indicates that Cenozoic basalts of eastern China are derived from the asthenosphere and thatthe average depth of faults progressively increases from south to north and from east to west.     

国家气象中心数值预报业务的进展

在最近的１５年中，国家气象中心的数值预报业务高速度发展，预报模式从北半球模式发展为全球谱模式，并配套建立了资料同化系统和用于降水预报的有限区预报模式，暴雨和台风预报模式正在研制中。目前数值预报时效已延至７天，Ｔ６３９３丙上时的预报水平已优于的数值预报产品的应用技术在不断改进，最高（低）气温下两天ＭＯＳ预报精度已接近预报员制作的综合预报结果。     

济阳坳陷上第三系的沉积特征及沉积相的纵向演化规律

本文根据岩性特征、沉积构造、砂体厚度和测井曲线特征等资料，对4口岩心井进行了沉积相分析，详细研究了不同时期的河流类型及沉积相的演化规律，从而认为济阳凹陷上第三系沉积大体经历了3个阶段：早期的冲积扇一辫状河阶段，中期的辫状河一低弯度曲流河阶段及晚期的高弯度曲流河阶段，同时分析了不同砂体的油气储集性能。     

济阳坳陷上第三系馆陶组上段沉积相研究

利用地质资料、测井资料、地震资料及分析化验资料对济阳坳陷上第三系馆陶组上段岩相古地理特征进行了全面系统地研究。首先从岩性、沉积结构和构造、砂体形态、电性特征、地震反射等方面论证馆陶组上段为山麓洪积相和河流相沉积，其中它们又可进一步细分为10种亚相或微相。其次，详细论述了沉积相的平面展布，同时还指出了油气分布与沉积相带的关系。此外，本文还指出馆陶组上段沉积期的物源方向、河流流向、最终汇水区及当时的古气候条件等。