东天山觉罗塔格地区夹白山一带晚古生代构造格局及演化

研究区早石炭世经历了中天山古陆北缘被动陆缘向活动陆缘沟弧盆体系演化的全过程。阿齐山-雅满苏岛弧带于维宪期发育在广宽陆棚海之上。岛弧为大型背形结构,雅满苏断裂带为火山喷发的主要通道,弧前盆地生成于弧沟间隙部位。晚石炭世早期,弧后区发生扩张作用而塌陷形成向形的边缘盆地。晚石炭世末,北侧康古尔洋区以弧弧对接方式关闭,弧区伴有深成花岗岩浆侵位。早二叠世早期进入松弛阶段,在弧间及弧后南缘产生上叠断陷盆地。晚二叠世右旋走滑变动席卷全区,最后大型造山带与地块之间发生块体右旋滑移错位,由此奠定了现今的盆山构造格局初貌。     

Ionospheric storm effects in the nighttime E region caused by neutralized ring current particles

During magnetic storms an anomalous increase in the ionization density of the nighttime E region is observed at low and middle latitudes. It has been suggested that this effect is caused by the precipitation of neutralized ring current particles. Here a coupled ring current decay-ionosphere model is used to confirm the validity of this explanation.     

湖南砂矿金刚石的颜色

研究表明,湖南砂矿金刚石中存在着两类决定金刚石颜色(主要指黄、褐和绿色)的色心。一类是氮原子中心,有孤氮原子和N3中心。另一类是辐射损伤中心,有GR1、637、595、H3、H4和3H中心。文中还讨论了这些色心的地质意义。     

湖南砂矿金刚石中顺磁氮的分配特点和金刚石归类问题

利用EPR检测了200多颗湖南砂矿金刚石。为53颗晶体测定了顺磁N的含量。阐明了砂矿金刚石中顺磁N分配的一般特点:具顺磁N信号者占30％,具较大顺磁N含量(10~(17)—10~(18)N原子/cm~3)者只占7％,属I_b型的晶体～2％。通过顺磋和红外光谱资料对比,发现了一些奇异现象,设想后者起因于混型晶的存在。为使金刚石正确归类,给出了一套测试方案,强调了紫外、红外光谱,紫外形貌照相和EPR等手段的联合使用。     

The New SCIAMACHY Reference Solar Spectral Irradiance and Its Validation

This paper describes a new reference solar spectrum retrieved from measurements of the satellite instrument SCIAMACHY in the wavelength region from \(0.24~\upmu\mbox{m}\) to \(2.4~\upmu\mbox{m}\) and its comparison with several other established solar reference spectra. The SCIAMACHY reference spectrum was recorded early in the mission before substantial optical degradation due to the harsh space environment sets in. The radiometric calibration of SCIAMACHY, applied in this study, includes a physical model of the scanner unit. Furthermore, SCIAMACHY’s internal white light source (WLS) is used to correct for on-ground to in-flight changes. The resultant calibrated solar spectrum from SCIAMACHY is in good agreement with several available solar spectral irradiance (SSI) references in the visible spectral range. Strong throughput losses due to detector icing in the near infrared (NIR) are now adequately accounted for. Nevertheless, a deficit with respect to the ATLAS-3 composite and SORCE/SIM SSI is observed in the NIR. However, the SCIAMACHY solar reference spectrum agrees well with the recently re-evaluated SOLAR/SOLSPEC-ISS and recent ground measurements taken at Mauna Loa in the NIR.     

Study on the Length of Cross-Bay Bridge at Tieshan Port

To determine the optimal length of the cross-bay bridge at the Tieshan Port and the impact ofthe bridge on the hydrological environment,a 2-D numerical model is adopted to calculate the variation oftidal level,tidal current field and tidal discharge caused by different lengths of the bridge.     

松辽盆地油气无机成因与勘探方向

松辽盆地中浅层沉积层勘探已接近饱和,随着油气勘探向深层进军,油气无机成因研究在勘探实践中日益重要。徐家围子深层天然气为典型的无机成因天然气。松辽盆地三肇地区扶、杨油层原油“上生下储”模式的否定,为寻找深部油源提供了可靠的事实依据。古潜山油气藏“新生古储”和“侧向运移”模式的否定,为基岩油气藏无机成因提供了可靠的证据。松辽盆地无机成因油气藏研究需要得到有力的支持和保证,因为基岩油气藏勘探是松辽盆地今后首选勘探目标。     

中国西部铂矿床类型与找矿方向探讨

中国铂矿资源严重不足,主要分布在中国西部,根据原生矿床特征可划分为4类：①硫化物型;②铬铁矿型;③辉石岩型;④层控型。寻找铂矿新类型和富铂(岩石)资源,应成为解决中国铂矿资源紧缺的重要任务。铂矿找矿方向：地台与地槽接合部位,特别是围绕着基性、超基性岩内外接触带,铂的预富集岩带与层控型铂矿带,另外还有砂铂型铂矿发育区有望扩大找铂前景。     

广东温泉水-汽转化过程对室内氡浓度的影响

研究了广东省四家温泉宾馆室内温泉水及其使用过程中对氡浓度的影响。利用RAD-7测氡仪和NR667A测氡义连续测量室内外氡浓度和水氡浓度,发现室内氡浓度受地基土壤、建筑物类型、利用方式(是否洗浴、洗浴时间长短等)、通风状况等诸多因素的影响。无人入住时宾馆室内氡浓度的变化说明土壤氡的渗入是底层房间室内氡的重要影响因素。当在浴室内使用温泉水洗浴时,浴室内平均氡浓度比没有用温泉水时高出1～8．3倍,客房内氡浓度比没有用温泉水洗浴时高出1．2～8．3倍。在使用温泉水时,某些宾馆室内氡浓度超标,可能对宾馆工作人员造成潜在的健康危害,应采取管理措施或技术手段降低其暴露水平。     

新疆地区重力变化与伽师6.8级地震

分析了新疆地区1998～2002年重力变化，研究了重力变化与伽师6．8级地震活动的关系，认为：重力场动态图像对伽师6．8级地震有较好的反映，重力测量可以较好地反映活动断层的物质迁移和构造形变引起的地表重力变化。