U-Pb Zircon Geochronology and Geochemistry of Granitoids in the Douling Group in the Eastern Qinling

LA-ICPMS U-Pb zircon dating of the Sanpinggou, Gangou and Fengzishan granitoids in the Douling Group of the Eastern Qinling yields ages of 760-685 Ma, which represents a strong tectono-magmatic event in the southern Qinling during the late Neoproterozoic. Geochemical data show that these intrusions have wide compositions ranging from minor gabbros through diorites to granodiorites. They are relatively enriched in LILE, poor in HFSE and strongly depleted in Nb and Ta, displaying affinities of Ⅰ-type granites formed in an active continental margin with oceanic subduction. In contrast to granitoids, gabbros and enclaves in the granitoids have higher REE abundances, relatively flat REE patterns, lower LILE, slightly higher HFSE and more depletion in Nb and Ta. All these suggest that the gabbros were formed by partial melting of the upper mantle above the subduction zone and the granitoids by the partial melting of the lower crust. Combined with regional geological data, the subduction-related granitoids in     

Changes of serum thyroid hormone and plasma catecholamine of 16 th and 17 th Chinese Expeditioners in Antarctic environment

The serum thyroid hormone and plasma catecholamine were examined in 18 male and 2 female members of the Chinese Antarctic Expedition (who spent the 2000 or 2001 austral winter at the Great Wall Station) . The changes of serum thyroid hormone i. e. total thyroxine (TT4) and free T4 (FT4) , total triodothyronine (TT3) and freeT3 ( FT3 ) , thyroid stimulating hormone ( TSH ) and plasma catecholamine, including norepinephrine (NE) , epinephrine ( E) and dopamine ( DA ) , were investigated by Chemoluminescence Immunoassay (CLIA) and High Performance Liquid Chromatography with electrochemical detection (HPLC-ECD) . Samples were taken at different time; (1)1 day before departure to Antarctica (16th expedition 1999/12/ 09; 17th expedition 2000/12/06). (2) 1 day after returned to China after living 54 weeks in Antarctica ( 16th expedition 2000/12/25 ; 17th expedition 2001/12/25 ). Comparing the data of before departure and returned, results showed that there was a significant decrease in the contents of TT4 (P <     

外部性脑积水的CT与临床分析

探讨外部性脑积水（ＥＨ）的ＣＴ与临床表现特点及关系。材料与方法：搜集２４例ＥＨ的ＣＴ资料进行分析,并对其中１０例进行了临床与ＣＴ复查．结果：２４例ＣＴ上均有不同程度额顶部蛛网膜下腔增宽,大脑前纵裂增宽,并多伴有基底池扩大．复查显示,３个月全部为典型表现,６～１２个月ＣＴ征象逐渐减轻,２４个月大部分病例逐渐或完全恢复正常．临床症状随之减轻或消失．结论：ＥＨ是发生在婴儿早期的良性自愈性疾病,预后良好．     

FY-3D/HIRAS光谱定标精度评估中的最佳光谱区域选择

光谱定标精度的精确评估和监测,是红外高光谱数据应用之前的重要工作。光谱定标精度评估常用"互相关"方法,即通过平移观测谱使得观测谱与参考基准谱之间满足最大相关或最小标准差条件。考虑到计算耗时,无须在全谱段检测频偏,而用部分光谱区域评估光谱定标精度。为全面评估"互相关法"对光谱区域选择的依赖程度,初步选择光谱区域依据理论模拟光谱(只考虑仪器离轴效应)的敏感性分析,最佳光谱区域选择基于实际观测光谱的敏感性分析。基于模拟光谱的敏感性分析表明:光谱精度评估方法对光谱区域的选择在中波波段不敏感,在长波和短波波段比较敏感,其敏感性与光谱区域内吸收带的包络特征、辐射能量的大小有关;选择不同光谱区域引入的绝对误差在长波和短波波段最大分别可达3.05和3.35 ppm(1 ppm=10~(-6));因此,当光谱区域选择在辐射能量较大,大气成分含量稳定的大气分子吸收带,能有效减小"互相关法"引入的误差。进一步基于风云三号D星红外高光谱大气探测仪(FY-3D/HIRAS)观测光谱,研究提出了HIRAS光谱精度评估的最佳参考光谱区域:长波波段为[716,766] cm~(-1),中波波段为[1270,1320] cm~(-1),短波波段为[2159,2209] cm~(-1),基于上述光谱区域评估的HIRAS光谱偏差平均值均优于2 ppm,长波和中波的标准差优于2 ppm,短波的标准差约为4 ppm。研究结果对其他红外干涉仪器的光谱定标精度评估和频率长期稳定性监测也具有参考作用。     

Dynamic mechanism and present situation of rural settlement evolution in China

This paper provides a detailed analysis of the factors influencing the evolution of rural settlements, including natural environmental constraints, infrastructure, regional cultural inheritance and integration, urbanization and rural industrial transformation, land use reformation and innovation, rural household behavior conversion, macro-control policy factors, and so on. Based on differences between the ways and degree of effect on rural settlement evolution, these factors are classified into basic factors, new-type factors and mutation factors. The drive of basic factors mainly focuses on the traditional inheritance of rural settlements, the new-type factors mainly affect rural settlement transition, and the mutation factors may bring about sudden changes. All these factors constitute a “three-wheel” driving mechanism for the evolution of rural settlements, and shape three typical driver paths: slow smooth path under the basic factors, new path to rapid development under the new-type factors, and the sudden change path under the mutation factors. The paper also investigates the overall situation of rural settlement evolution in the aspects of settlement system, settlement scale, settlement morphology, settlement function, settlement culture, settlement environment, etc. The general process of rural settlement evolution is divided into four stages: initial, transitional, developmental, and mature stages.     

居留南极对考察队员血中甲状腺素和儿茶酚胺含量的影响

本文报道了中国第 1 6次南极考察队 (长城站 )队员赴南极前和在南极居留一年二周返回国内后 ,血中甲状腺素和儿茶酚胺含量的变化 ,以探讨考察队员在居留南极期间普遍存在的生理和心理变化的物质基础。 1 6次队 1 0名男性考察队员血样分别用化学发光法检测血清总甲状腺素 (TT3、TT4)和促甲状腺激素 (TSH)的含量 ,用高效液相色谱 -电化学法测定血浆中肾上腺素(E)、去甲肾上腺素 (NE)和多巴胺 (DA)的含量。结果表明 :长城站 1 6次队 1 0名男性考察队员赴南极前和在南极居留一年二周返回国内后相比 ,血清中甲状腺素TT3含量无显著性差异 ,TT4含量有非常显著性降低 (P <0 0 1 ) ,促甲状腺激素TSH含量有非常显著性升高 (P <0 0 1 ) ;血浆中的NE、DA含量无显著性差异 ,E的含量有显著性降低 (P <0 0 5 )。南极特殊环境对考察队员甲状腺功能具有减退作用 ;对肾上腺髓质E在血浆中含量有降低作用 ;甲状腺和肾上腺髓质系统共同参与南极综合应激反应 ,以调节机体与外界的平衡。     

城市群、产业集群与开发区互动发展研究——以长株潭城市群为例

城市群、产业集群与开发区的协同发展是实现城市群地区可持续快速发展的重要手段。在已有文献研究的基础上,基于宏观与微观相结合的视角,梳理了城市群、产业集群与开发区三者之间的关系及互动机制。认为城市群是新型城镇化的主体形态,是产业集群和开发区发展的空间载体,城市群为开发区和产业集群发展提供生产要素、服务和市场;开发区是城市群的创新创业高地与产业集聚、集群发展的重要场所,是城市群的重要生产功能区;产业集群是产业发展的重要组织形式,是推动开发区和城市群发展的重要驱动力。产业集群与开发区共享着城市群的资源与服务,开发区通过产业集聚与创新,产业集群通过产业链延伸、耦合与创新,与城市群形成生产要素、市场交易、创新与服务等方面的多维度相互作用,最终实现三者的协同发展。基于城市群、产业集群与开发区规模、结构、职能和创新等4个方面的17个指标,采用典型相关分析法,以长株潭城市群为案例区,对城市群、产业集群与开发区两大变量组进行了互动因素与强度的量化分析,结果表明：① 长株潭城市群、产业集群与开发区已形成有效互动。其中,城市群通过经济规模、城市结构、创新投入与产出、服务职能的发展,促进产业集群的经济规模、产业集聚、经济效益与产业创新,以及开发区的建设品质、产业集聚与产业效率的发展。开发区通过产业集聚与创新效率的提高,产业集群通过产业规模、效益协同开发区效率的提升,强化了城市群规模、结构、创新与职能的发展。② 长株潭城市群通过经济规模、结构、创新与服务四类因子,对产业集群与开发区产生了全面的促进作用,但产业集群与开发区并未完全协同地促进城市群发展。③ 要进一步提升产业集群的效益与开发区的效率,加强其对城市群发展与繁荣的支撑作用,全面实现三者的多维良性互动,提高城市群的核心竞争力。     

无地面控制的海岸带航空遥感测量精度研究——机载LiDAR用于胶州湾海岸带测量

海岛海岸带地区,地理位置特殊,不便地形测量;对该区域进行航空遥感测量时,由于区域内大部分为低纹理地区,进行同名点匹配有困难,且不易进行野外控制点加密测量。机载(LIDAR)因其发射的激光脉冲能部分地穿透树林遮挡,具有一定的透水性能,能获得滩涂地区的高程,并且其系统配备的全球定位系统(GPS)和惯性测量系统(INS),使其定位精度得到很好的保证。文中选用胶州湾沿岸为试验区域,采用Leica公司的ALS70在低潮时进行测区的数据获取,并对结果进行精度分析,得出在该区域采用机载激光扫描系统ALS70进行无野外控制点加密的航空遥感,成果精度能满足1∶5 000比例尺测图的需要。     

山东沂南金矿田成矿构造系统和构造控矿规律

通过成矿构造研究并辅以多种找矿手段综合分析,以期取得危机矿山找矿的新突破。通过矿区构造地质调查、构造地球化学测量、构造蚀变带填图和以往勘探资料系统整理编图,厘定了沂南金矿田区域性断裂构造(入字型构造)与岩体侵位构造(仌字型构造)复合成矿构造系统,阐述了复合成矿构造系统的基本要素、特征和控矿作用,系统地总结了矿田构造控矿规律。提出:由金场岩体、铜井岩体、银山庄岩体构成了门字形的区隔化空间,控制了金场矿区和铜井矿区富矿段的产出;中酸性岩柱、岩颈及近接触带的寒武系和新元古界多层次的层间滑动带和岩床构造,控制了多层次金铜矿体的产出,但在远离接触带的部位,高角度次级的NNE、NWW-NW向断裂,控制了构造蚀变岩型的金铜矿体;堆金山矿段不是典型的斑岩型金矿,而是产在玢岩体中受NWW-NW向断裂控制的构造蚀变岩型金矿;土门群和泰山群不整合面亦是重要的控矿界面,值得下一步找矿的重视;矿田矿化深度东深西浅,南深北浅,与基底泰山群顶界的埋深具有明显相关性。