末次盛冰期以来兴凯湖的古环境演变——基于地磁场长期变化的年龄框架

对小兴凯湖内一根长6m的钻孔（XKH1）进行了沉积物颜色、粒度、古地磁和总有机碳、总氮分析。通过与贝加尔湖和琵琶湖沉积岩芯磁倾角记录的对比,建立了该岩芯的时间序列;基于多指标综合分析,重建了24ka以来兴凯湖区域古环境和古气候演化历史,讨论了湖区环境对东亚季风和北半球温度变化的响应;通过粒级-标准偏差方法获得的环境敏感粒级组分9.29~63.00μm能作为降水量的指标。末次盛冰期时（24.0~19.5ka B.P.）,东亚冬季风盛行,XKH1岩芯沉积物平均粒径相对较粗,亮度（L*）和磁化率（χ）值高,有机质含量低,反映湖区气候冷湿,湖泊缓慢扩张,湖面比现在低。19.5~18.4ka B.P.,东亚夏季风逐渐减弱,使流域降雨量减少,湖泊收缩,沉积物有机质含量显著增加,可能在湖滨区域发育了沼泽沉积。18.4~15.1ka B.P. 沉积物中植物茎碎片含量高,砂含量波动频繁,指示了湖面进一步降低。冰消期（15.1~11.4ka B.P.）,沉积物磁化率（χ）升高,色度值（a*）减小,反映东亚夏季风逐渐增强,湖区降雨量增加,湖泊扩张,为高湖面时期,沉积层底部和顶部砂含量增加明显,环境敏感粒级组分9.29~63.00μm的含量呈现减小-增大-减小的变化规律,可很好的对应于 OD/B-A/YD气候波动事件。进入全新世,夏季风进一步增强,11.2~10.6ka B.P. 时,XKH1沉积物平均粒径增加,指示降雨量的增加为湖区带来大量沉积物,开始在近岸发育砂坝,大、小兴凯湖被隔开;3.80~0.58ka B.P. 时,色度值（a*）剧烈升高,发育虫穴构造并被黄褐色结核充填,指示湖面变浅,气候干旱。     

A Preliminary Analysis of Relations Between Tectonic Deformation of Sedimentary Cover and Basement in Kuqa Depression

Study of seismic activity in the Kuqa area enables us to infer some possible active faults in basement from the epicentral distribution on different profiles. The relations between active faults in the basement and surface structures are analyzed and the difference between sedimentary cover and basement in their deformation characteristics and the genesis are discussed. The following conclusions have been drawn : ( 1 ) the epicentral distribution indicates that, the east Qiulitag and south and north Qiulitag deep faults in the basement correspond to the east and west Qiulitag anticlines, respectively. Moreover, deep faults also exist beneath the Yiqiklik and Yaken anticlines. It indicates that the formation of surface structures is controlled by deep structures; (2) A NE-trending strike-slip fault develops along the line from the western termination of Yiqiklik structure to Dongqiu Well 5 and a NW-trending active fault on the western side of Baicbeng. The two active faults across the tectonic strike are the main causes for tectonic segmentation of the Kuqa depression and possibly the cause for the middle segment (Kuqa-Baicheng) of the depression to be more shortened than both its eastern and western terminations; (3) The difference between the sedimentary cover and basement in their deformation characteristics depends mainly on the different properties of media between them.The lithospheric strength of the basement in the basin is fairly high, which determines the basement deformation to be mainly of brittle fracture seismic activity. While the strength of sedimentary cover is low, where there exist weak thin layers, such as coal and gyps. Under the effect of strong tectonic compression, the sedimentary rocks may undergo strong viscous or plastic flow deformation; meanwhile, an aseismic detachment may take place along the weak layers.     

2015年7月3日新疆皮山M_S6.5级地震震害特征分析

2015年7月3日新疆皮山M_S6.5级地震灾区地处塔里木盆地南缘,该地自然条件恶劣,经济极为落后,灾区农村的民房除了抗震安居工程建设的房屋外,还有大量抗震性能较差的民居,在地震中受损严重,经济损失较大。灾区大部分位于山前溢出带,地下水位浅、地基土层软弱等场地条件对地震动有放大作用,震害影响范围较大。灾后重建中应继续加大安居富民工程的经费投入力度。灾区北部人口密集,地基土层软弱,工程地质条件差,建议在今后的安居富民建设中加强地基处理。     

论环渤海地区资源结构与产业结构特点

环渤海地区是一个资源型产业聚集区,其产业结构的形成与特点同资源结构间有着密切的联系.本区资源结构特点可以概括为光、热、水、土资源组合较好,矿产资源丰富且矿种配套较佳、钢铁和化工工业生产条件理想,水资源不足、水土和水矿结构不尽理想.在资源结构基础上形成了本区产业结构中第一产业基础较好,第二产业强大、采掘和原材料工业突出,第三产业相对比较落后的特点.这些特点是环渤海地区今后产业结构升级转换的主要影响因素.     

机载三维成像系统

本文简要地阐述了新型机载三维成像系统的产生环境、原理、技术结构、特色及应用领域 ,介绍了飞行检测、应用飞行所取得的成果。为实现高效遥感对地观测体系迈出的第一步。     

整顿和规范矿产资源开发秩序促进矿业经济持续健康发展

苍山县矿产资源比较丰富,境内石膏、铁矿、石英砂岩、石灰岩等矿种储量大、品位高,具有较好的开发前景。为尽快把资源优势转化为经济优势,促进苍山县经济快速发展,苍山县各级领导和有关部门在矿产资源开发管理方面做了大量的工作,取得了显著成效。     

北黄海沉积物中重金属分布及环境背景值

本文讨论了北黄海１１个柱状岩芯样的颗粒物（＜０．０６３ｍｍ）中重金属的分布，采用统计学方法对Ｃｕ，Ｐｈ，Ｚｎ和Ｃｄ进行态性检验，用柱样稳定段（拐点以下）作为背景段，获得重金属环境背景值．     

High-pressure phase transformations of fluorite-type dioxides

Phase transformations in six fluorite-type dioxides (“TbO₂”, PbO₂, “PrO₂”, CeO₂, UO₂ and ThO₂ in the order of increasing cation size, where the quotation marks indicate non-stoichiometric materials) have been investigated in the diamond-anvil press coupled with laser heating. Together with earlier work, the results show that the post-fluorite phase transformations of these dioxides fall into two groups. The smaller cation group (HfO₂, ZrO₂ and “TbO₂”) transforms to a cotunnite or a distorted cotunnite-type structure at pressures in the vicinity of 100 kbar and at about 1000°C. The larger cation group (from PbO₂ to ThO₂) is believed to transform to a different type of orthorhombic modification at high pressures. It is plausible that this high-pressure phase may possess a Ni₂Si-related structure, as was observed in ThO₂ and “PrO₂” at pressures greater than 150 and 200 kbar, respectively. The dioxides with Ni₂Si-related structure are the most closely packed dioxides known to exist. It is suggested that all the polymorphic structures of ZrO₂ (baddeleyite, tetragonal fluorite, cubic fluorite and cotunnite) plus the new phase found in the large cation group dioxides are possible high-pressure models for the post-rutile and/or post-Fe₂N phases of SiO₂. The polyhedral coordination in these model structures varies from 7 to 10, compared with 6 for the rutile-and Fe₂N-type SiO₂. The fact that the larger cation group adopts a very closely packed structure at high pressures substantiates the earlier hypothesis that the radioactive elements U and Th in the earth's deep mantle are most likely to occur as dioxide rather than as silicate.