浙江省常山县八面山矿区萤石及钨、锡多金属成矿地质特征

八面山萤石、钨锡多金属矿床赋存于中、上寒武统碳酸盐岩地层内,沿燕山期侵入的岩前二长花岗岩体环状分布。成矿具有多阶段、多类型特征,主要有矽卡岩型萤石、锡多金属矿床、蚀变花岗岩型锡矿床(或矿化体)、高温热液石英脉型钨锡多金属矿床、中低温热液交代(伴充填)萤石矿床等。其中以似层状、透镜状和陡倾斜脉状产出的萤石矿床规模最大,是近几年浙江省新发现的萤石矿床类型,对今后本区域进一步开展勘查找矿具有重要指导意义。     

新疆地震宏观测报日常管理与应用系统的设计与实现

新疆地震宏观测报日常管理与应用系统利用WebGIS技术和.NET架构,采用SQL Server2000数据库、SharpMap开源GIS引擎、C#、ASP.NET、JavaScript软件组合开发的管理应用系统,能够增强群测群防能力,丰富“三网一员”工作内容,为地震短临预报提供快速、准确的信息.     

长江经济带经济增长与资源环境的协同效应及其驱动力分析

基于人口、资源、环境与经济、社会协调发展的视角,引入生态系统服务价值评价方法构建资源环境成本核算模型以及经济增长与资源环境的协调发展度、相对协调发展度模型,对长江经济带区域经济增长与资源环境的协同效应进行分析、并以偏最小二乘回归方法对其驱动因素进行解析。计算出1983–2012年长江经济带7省2市资源环境成本由4736.55×10^12元攀升至15 359.45×10^12元、占全国同期比重由31.1%降至19.7%,协调发展度由0.295升至1.506,各时段相对协调发展度均高于全国平均水平;1983、1993、2003年3个时段驱动长江经济带区域经济增长与资源环境协调发展的主要因素是资源环境成本相对较低,研究区对推动我国经济、社会协调发展均做出较大贡献;2012年以后随着我国第一、三产业增加值整体上持续增加,长江经济带的比较优势趋于弱化。未来,长江经济带有关省市应积极完善主体功能区规划实施细则,抓住机遇持续推进产业结构调整,通过各个层面实施生态恢复补偿、提高资源利用效率、降低环境损失成本等提高经济发展质量,进一步促进区域经济增长与资源、环境协调发展。     

单星模糊度固定的整数相位钟法及在低轨卫星定轨中的应用

单星GPS相位模糊度固定可以显著提升低轨卫星的定轨精度.目前,CNES/CLS、武汉大学和CODE 3家机构都已公开发布用于单星模糊度固定的GPS整数相位钟产品.本文首先利用整数相位钟方法实现单星模糊度固定,并应用于低轨卫星精密定轨中;然后,对比分析了不同机构提供的整数相位钟产品在低轨卫星单星模糊度固定和精密定轨中的应...     

胶辽地块古元古代构造—热演化与深部过程

近年来的研究表明，华北克拉通由东部地块和西部地块于1．85Ga沿中部带碰撞形成，且碰撞前东部地块的西缘为活动陆缘，研究程度高。相比之下，东部地块的东缘大面积分布的古元古代胶辽吉造山带研究薄弱。根据新近多学科研究成果，综合揭示出胶辽吉造山带古元古代的构造—热演化和深都地质作用过程如下：早期底侵可能与深都地幔柱相关，发生于2．53～2．36Ga之间，导致2．47～2．33Ga岩墙事件、胶辽吉裂谷带的形成和双峰式火山活动。该幕底侵不仅导致地壳上都沉积格架的不同，也导致地壳内初始热结构的分异，从而决定不同空间上变质作用类型和PTt轨迹的差异。晚期底侵导致地壳下部于2．17Ga左右产生A型辽吉花岗岩、2．2Ga与2．0Ga的伟晶岩事件和顺层伸展变形。其主要的造山运动发生在1．911～1．883Ga之间，裂谷封闭、收缩变形，在该造山带南部出现高压变质。之后，1．875～1．66Ga之间，出现小断块的拆沉、环斑花岗岩、钾长花岗岩和正长岩的非造山岩浆事件、伟晶岩脉和基性岩墙群事件和榆树砬子群沉积。东都地块南缘大别—苏鲁一带1．7～1．6Ga期间应是一个重要的古元古代强烈活动陆缘带。中元古代1．6Ga以后大别—苏鲁一带经历了一系列再造事件而与东都地块主体形成显著差异。总之，胶辽吉造山带的底侵样式、碰撞过程、拆沉方式都直接制约着浅部地壳的构造—热演化特征。     

四川拉拉铜矿床赋矿层位变质沉积岩地球化学特征

拉拉铜矿区赋矿层位变质沉积岩的主量元素(ICV(av)=3.04,K2O/Al2O3(av)=0.22,CIA(av)=53.1)及Cs、Rb显著亏损特征,表明其物源区岩石只含有较少的粘土矿物和碱性长石,为中—低化学风化程度,且处于较不稳定的构造环境;多数样品的微量元素表现为显著富集高场强元素、亏损过渡族元素及Cr/Zr(av)=0.15、Th/Sc(av)=0.58,且具轻稀土富集、重稀土平坦((La/Yb)n(av)=25.7)的稀土元素配分模式,表明物源区以长英质组分为主;Sm、Nd同位素组成特征也显示其物源区以长英质组分为主,且沉积于大陆岛弧的弧后拉张环境。同时,结合矿区赋矿层位变钠质火山岩的构造判别结果,认为拉拉铜矿床也形成于该构造背景下。     

松辽盆地北部姚家组底部不整合面的发育特征及形成机制初探

松辽盆地北部姚家组底部的不整合面（T_1-1界面）为区域性不整合面,这一不整合面标志的隆升事件不仅控制了地层分布和层序划分,而且把盆地的坳陷阶段分为湖侵特征各不相同的两个亚阶段.姚一段的剥蚀区主要见于松辽盆地的东部和北部,反映造成这一隆升的挤压应力场来自其东南,与东亚大陆边缘移置地体的拼贴有关.松辽盆地是一个与燕山造山作用耦合发育的内陆盆地,坳陷（裂后热沉降）阶段的盆地发育受制于两个造山作用：西侧大兴安岭的热隆升和其东的东亚大陆边缘的地体拼贴引起的斜向汇聚-剪切造山作用.     

DORIS实时定轨中的频偏估计方法研究

针对DORIS测站和卫星USO频率偏差引起的测量数据不准确的问题,提出了一种频偏估计方法,消除了测量数据中的最大误差项。在摄动加速度模型仅考虑40×40阶重力场、固体潮和日月三体引力的条件下,利用该方法处理了SPOT-5卫星10d的测量数据。结果表明,实时轨道的径向精度优于30cm,与SPOT-5卫星的实时轨道精度相当;3D精度优于80cm,达到了SPOT-5卫星的设计精度。     

The performance of the Noblesse multi-collector noble gas mass spectrometer for <Superscript>40</Superscript>Ar/<Superscript>39</Superscript>Ar geochronology

Noblesse multi-collector noble gas mass spectrometer is specially designed for multi-collection of Ar isotopes with different beam sizes, especially for small ion beams, precisely, and hence is perfectly suitable for ⁴⁰Ar/³⁹Ar geochronology. We have analyzed widely used sanidine, muscovite, and biotite standards with recommended ages of ~ 1.2–133 Ma, with the aim to assess the reliability of Noblesse for ⁴⁰Ar/³⁹Ar dating. An ESI MIR10 30W CO₂ laser was used for total fusion or incremental heating samples. Extracted gases were routinely purified by four SAES NP10 getters (one at ~ 400 °C and others at room temperature). A GP50 getter and a metal cold finger cooled by liquid N (? 196 °C) were also attached for additional purification if necessary. The Ar isotopes were then measured by Noblesse using Faraday or multiplier according to the signal intensities. Over a period of 1.5 months 337 air calibrations produced a weighted mean ⁴⁰Ar/³⁶Ar of 296.50 ± 0.08 (2σ, MSWD = 4.77). Fish Canyon sanidine is used to calculate J-values, which show good linear relationship with position in irradiation. The age of four mineral standards (Alder Creek sanidine, Brione muscovite, Yabachi sanidine, and Fangshan biotite) are within error of the accepted ages. Five Alder Creek sanidine aliquots yielded an age range of 1.174–1.181 ± 0.013 Ma (2σ) which broadly overlaps the established age of the standard and the uncertainty approaches those of the foremost Ar/Ar laboratories in the world. The weighted mean ages of four Brione muscovite aliquots (18.75 ± 0.16 Ma, 2σ), five Yabachi sanidine aliquots (29.50 ± 0.19 Ma, 2σ), and three Fangshan biotite aliquots (133.0 ± 0.76 Ma, 2σ) are consistent with the recommended values of these standards, and the uncertainties are typical of modern Ar/Ar laboratories world-wide.     

Empirical Research on Carrying Capacity of Human Settlement System in Dalian City,Liaoning Province,China

Using the theories of population carrying capacity and ecological elasticity in other fields for reference, the connotation of regional human settlement system was defined from the viewpoint of the complex relationship among the factors such as regional population, resources, environment and economic and social development in the context of China′s rapid urbanization. Then the concept and characterization methods of the regional human settlement carrying capacity were proposed by means of population scale. Furthermore, a model of carrying capacity-pressure-state-response(CPSR) on regional human settlement system was established by referencing pressure-state-response(PSR) model, and the Catastrophe Theory was introduced to determine the corresponding standards of multi-criteria programming and evaluation. Taking Dalian City, Liaoning Province, China as an example, an empirical analysis on evaluation of human settlement system from 2000 to 2012 was carried out. The results showed that the carrying capacity of human settlement system in Dalian was fluctuating between 9.6 × 106 to 10 × 106 persons with a quantitative stage of the dynamic regulation. During the research period the load index of human settlement system in Dalian dropped from 0.96 to 0.84 with a lower pressure of human settlement system than the national average level. And the emergency response grades of human settlement system in Dalian were kept in grade Ⅱ(orange warning) or grade Ⅲ(yellow warning). Human settlement system of Dalian was in slight security state as a whole, but the load had a tendency of increase in recent years. The related departments should pay close attention to regional human settlement system and take active measures to improve human settlement by both intensity control and total quantity control. By comparison, analysis and discussion, it was considered that the results were basically accordded with the current situations of human settlement in Dalian, and the evaluation results were more reliable, visualized and easily applied in practice. Therefore, the above-mentioned concepts, characterization and evaluation methods of the regional human settlement system and carrying capacity could provide a new thought and method for quantitative evaluation of human settlement.