超基性岩体中橄长岩-异剥辉长岩分异脉岩与铬铁矿的成因联系

1958年袁棨林在我国北部一地槽区曾注意到有两类超基性岩体。第Ⅰ类有橄长岩-异剥辉长岩分异脉岩(以下简称分异脉岩)的岩体,其造矿铬尖晶石为较富铝的富铬尖晶石亚种和富铁富铬尖晶石亚种,组成低品位冶金级矿石;第Ⅱ类为无分异脉岩的岩体,其中合富铬贫铝的铬铁矿亚种和富铁铬铁矿亚种,组成高品位冶金级矿石。它们虽然都是镁质超基性岩,同样是以斜辉辉撖岩为主的纯橄榄岩-辉橄岩杂岩体,而且都显示了较强的动力分异作用,只是由于出现或不出现与晚期岩浆铬铁矿有成因关系的分异脉岩,而使造矿铬失晶石成分有明显地不同。     

哀牢山变质带元江──墨江剖面岩石的纵波波速特征及其地质意义

依据研究区的地热梯度（25℃／km）,在高温高压（最高温度为1050℃,最高压力为1.2GPa）条件下系统测量了横穿红河-哀牢山断裂带的元江-墨江地质剖面上的哀牢山岩群各类变质岩（千枚岩、片岩、浅粒岩、变粒岩、大理岩和片麻岩）的纵波速度．实验结果表明,不同岩类的纵波速度随温度压力变化的趋势不同．在相当于衷牢山岩群变质岩峰期变质温度和压力条件下（P=0．4-0.8GPa,T=35-700℃）,测得大部分岩石的纵波速度为5．50－5．80km／s,这一纵波速度值与区域地球物理测深揭示的中地壳低速层的纵波速度相当因此,结合该区变质岩、地壳内热状态及地球物理测深研究成果可初步认为：组成哀牢山岩群的浅粒岩、变粒岩、酸性片麻岩以及部分千枚岩、片岩为该地区中地壳低速层的主要岩石类型．     

分布式社区口腔医疗信息管理系统设计

利用SQL Server和VB设计分布式社区口腔医疗信息管理系统,建立牙科电子病历,实现远程医疗信息共享和IC卡一卡通服务,改善口腔医疗服务水平.     

柴达木盆地侏罗系油气成藏模式与油气聚集规律

针对柴达木盆地侏罗系油气勘探目标选择的难点,从烃源岩与圈闭时空配置的角度,建立侏罗系油气早期聚集早期成藏、早期聚集晚期成藏、晚期聚集晚期成藏3种模式。盆地油气来源、充注时期、油藏调整及破坏等方面存在规律性,这决定了油气分布的有序性,呈现出“断褶区聚气,山前、潜伏区聚油,凸起顶、凸起斜坡区油气并存”的基本格局和油气富集程度依次变好的序列。据此预测油气富集范围,从中优选冷湖4号东斜坡、乌南—巴依凸起斜坡、怀头他拉—德北斜坡、潜伏Ⅰ号等新靶区。     

Geochronology and Geochemistry of Ore-related Granitoids in the Giant Gariatong Rb Deposit, Tibet and Implications for Rb Metallogeny in China

Rubidium (Rb) deposits mostly occur in the South China and Central Asia orogenic belts and are often closely associated with highly differentiated granites. This study investigates a newly-discovered giant Rb deposit at Gariatong in the Central Lhasa terrane in Tibet. Detailed field studies and logging data revealed that the Rb mineralization mainly occurs in monzogranite and is related to greisenization. LA-ICP-MS U-Pb dating of zircon yielded ages of 19.1 ± 0.2 Ma and 19.0 ± 0.2 Ma for greisenized monzogranite and fresh monzogranite, respectively. The monzogranites are characterized as strongly peraluminous, with high contents of SiO2, Al2O3, K2O and Na2O as well as a high differentiation index. They are enriched in light rare earth and large ion lithophile elements with signi?cant negative Eu anomalies and depleted high field-strength elements. Petrological and geochemical features of these ore-related monzogranites suggest that they are highly fractionated S-type granites, derived from remelting of crustal materials in a post-collisional setting. The geochemistry of zircon and apatite points to a low oxygen fugacity of the ore-related monzogranite during the magma’s evolution. The discovery of the Gariatong Rb deposit suggests that the Central Lhasa terrane may be an important region for rare metal mineralization.     

浅析翡翠的岩石类型对其比重、折射率的影响

翡翠的矿物组成、岩石类型不同，将会对翡翠的比重、折射率产生直接的影响。从翡翠的岩石学、矿物学角度出发，讨论了翡翠的岩石类型，依据组成翡翠的主要矿物的比重和折射率值，建立了翡翠矿物组成成分及含量与其比重、折射率关系图解，确定了各种翡翠的比重、折射率变化范围分别为：2．93～3．60和1．593～1．750；优质翡翠的比重、折射率分别为：3．178-3．240和1．644～1．657．为翡翠的质量评估提供了客观依据。     

医疗设施布局的GIS优化评价——以翔安区医疗设施为例

开展现有医疗设施布局的分析与评价,对解决公众医疗需求与医疗服务供给的矛盾,以及政府部门决策具有重要意义。本文在厦门市第一次全国地理国情普查试点的背景下,以翔安区医疗设施为研究对象,在地理国情普查数据结果的基础上,结合卫生等专业部门的统计数据,从医疗设施的现状、服务水平和空间布局优化3个角度,构建了医疗设施布局的评价指标体系。从医疗卫生角度分析医疗资源现状特征;基于GIS网络分析开展医疗设施服务水平的分析与评价;利用GIS"位置分配模型"对医疗设施空间布局进行优化。最后,本文对医疗设施布局提出改善建议和措施。研究结果表明:(1)翔安区医疗资源总量不足,分布不均衡;(2)城乡医疗设施差异明显,医疗服务水平不高;(3)翔安区需新增4家医院,5家卫生院才能满足居民就医需求。本研究可以为今后翔安区医疗设施布局决策提供借鉴和参考,为医疗设施布局评价提供一个可行的方法。     

洞庭青鲫(Carassius auratus var.Dongtingking)与三个鲫品系群体遗传多样性的ISSR分析

采用ISSR分子标记技术,对洞庭青鲫(Carassius auratus var.Dongtingking)、野生二倍体和三倍体鲫(C.auratus)、彭泽鲫(C.auratus var.Pengze)4个鲫品系群体共120个个体的遗传多样性进行分析。9个ISSR引物在四个鲫品系群体中共获得1637个扩增位点,其中多态位点1572个,多态位点比例为96.03%。4个鲫品系群体内的多态位点比例分别为46.14%、65.40%、73.76%和51.94%,遗传距离分别为0.0905、0.1186、0.1351和0.1056。在4个鲫品系群体之间,洞庭青鲫与彭泽鲫的遗传距离最小(0.1191),二倍体鲫和三倍体鲫的遗传距离次之(0.1336),而洞庭青鲫、彭泽鲫与二倍体鲫的遗传距离(分别为0.1377、0.1367)略小于它们与三倍体鲫的遗传距离(均为0.1378)。UPGMA聚类结果为洞庭青鲫与彭泽鲫聚成一个分支,二倍体鲫与三倍体鲫聚成另一个分支。结果表明,洞庭青鲫、彭泽鲫等养殖群体内的遗传多样性明显低于野生鲫群体;四个鲫品系中,洞庭青鲫与彭泽鲫的亲缘关系较近,二倍体鲫与三倍体鲫的亲缘关系较近,推测洞庭青鲫、彭泽鲫、三倍体鲫均起源于二倍体鲫。二倍体洞庭青鲫和二倍体野生鲫资源的保护必须引起重视。     

粤西沿海一次赤潮事件的三维观测

From November 24 to 26, 2014, a red tide event occurred in the offshore water off the Hailing Island located at the western Guangdong coast. The red tide appeared as pink strips distributed within 3 km in the offshore water and extended for about 10 km along the shoreline. During the flood tide, the pink seawater rushed to the beach with breaking waves, forming foam strips on the beach. Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction Technologies, Guangdong Ocean University, emergently responded to the event and organized three-dimensional observations from the air, onboard and on beach. The preliminary analyses of the cruise data and water samples indicate that the event was induced by nontoxic Noctiluca scintillans, of which the concentration reaches as high as 4 200 cells/L near the surface and 2 600 cells/L at the bottom.     

基于小波变换和HIS变换的海冰SAR与光学遥感影像融合方法研究

Sea ice as a disaster has recently attracted a great deal of attention in China. Its monitoring has become a routine task for the maritime sector. Remote sensing, which depends mainly on SAR and optical sensors, has become the primary means for sea-ice research. Optical images contain abundant sea-ice multi-spectral information, whereas SAR images contain rich sea-ice texture information. If the characteristic advantages of SAR and optical images could be combined for sea-ice study, the ability of sea-ice monitoring would be improved. In this study, in accordance with the characteristics of sea-ice SAR and optical images, the transformation and fusion methods for these images were chosen. Also, a fusion method of optical and SAR images was proposed in order to improve sea-ice identification. Texture information can play an important role in sea-ice classification. Haar wavelet transformation was found to be suitable for the sea-ice SAR images, and the texture information of the sea-ice SAR image from Advanced Synthetic Aperture Radar(ASAR) loaded on ENVISAT was documented. The results of our studies showed that, the optical images in the hue-intensity-saturation(HIS) space could reflect the spectral characteristics of the sea-ice types more efficiently than in the red-green-blue(RGB) space, and the optical image from the China-Brazil Earth Resources Satellite(CBERS-02B) was transferred from the RGB space to the HIS space. The principal component analysis(PCA) method could potentially contain the maximum information of the sea-ice images by fusing the HIS and texture images. The fusion image was obtained by a PCA method, which included the advantages of both the sea-ice SAR image and the optical image. To validate the fusion method, three methods were used to evaluate the fused image, i.e., objective, subjective, and comprehensive evaluations. It was concluded that the fusion method proposed could improve the ability of image interpretation and sea-ice identification.