苏浙皖地区海相油气地质特征及勘探目标的选择

从晚震旦世开始至中三叠世，苏浙皖（下扬子）地区沉积了三套巨厚的海相烃源岩系，即：上震旦统一上奥陶统，石炭系－二叠系，下三叠统海相烃源岩，三套烃源岩热演化特点不同，下古生界烃源岩经历了加里东、印支－燕山期构造阶段的热演化，已达过成熟干气阶段，上古生界烃源岩基本处于生油阶段晚期；大部分三叠系烃源岩处于成熟生油阶段，少数处于未成熟阶段，区内下古生界烃源岩经历了两次成油过程，第一次发生在加里东运动前的盆地沉降阶段，第二次发生在加里东运动后晚古生代陆表海代积阶段，全区海相油气储盖条件发育，配置有利，经多年油气勘探证实，下古生界油气勘探应立足于苏北地区，上古生界油气勘探除苏北地区外，尚有皖南与浙西地区，中生界海相油气勘探应集中在区内几个发育较好的中生代盆地，如常州、句容，无为，望江盆地等。     

1992年夏季苏州持续高温及其中期预报

分析１９５１年以来苏州夏季高温以及持续高温与厄尔尼诺、亚洲经向环流指数、副高强度指数的关系，１９９２年夏季根据ＧＭＳ卫星云图所反应的厄尔尼诺状况和其他因素，对日本９６－１９２小时的数值预报进行修正，准确及时地作出了持续高温的中期预报。     

An Experimental Study of Several Special Issues Regarding the Ice Force on Conical Structures

The effect of the cone spacing of a conieal structure on the ice force is studied by model experiments. The ice force reduction coefficient presented in this paper expresses the relationship between the ice force and the arrangement of cones. The experiments prove that the mode of the ice failure before the boundary of upward-downward bending cone (UDBC) is crushing. A conclusion can also be drawn from the experiments that the ice force on the boundary of UDBC is by far less than that on a vertical pile with the same diameter. Moreover, the ice force frequencies on upright and inve-rted cones are obtained under the field condition of the platform JZ20-2, respectively. The results show that the alterna-tion of the ice force on UDBC can hardly induce resonance of platform JZ20-2.     

Purification of a Diatom and Its Identification to Cylindrotheca closterium

A diatom was purified with colony selection and continuous dilution methods. It was identified to Cylindrotheca closterium according to its morphological characteristics and rbc L and 18 s r RNA gene sequences. The alga was not sensitive to ampicillin and neomycin, but sensitive to chloramphenicol which inhibited its growth at concentrations ranging from 50 to 150 μg m L-1. The purified alga was easy to culture and its specific growth rate was 0.207 ± 0.002(d-1). It was resistant to pollution and could be harvested in an easy way. It was relatively high in lipid content(20.08% ± 0.67% of dry weight) and the combined amount of its 16:0 and 16:1(n-7), the most suitable resource of biodiesel, was as high as 64% of the total fatty acids, while the amount of polyunsaturated fatty acids reached 19.96%–20% of the total fatty acids. Thus the purified C. closterium can be cultured as a biodiesel producer or a nutrition supplement producer.     

北京地区城市化过程与机制研究

在长时间序列高分辨率Landsat TM/MSS数据的支持下，对北京地区1975-1997年城市化基本过程和驱动机制进行了分析研究，基本结论如下；（1）北京地区城市化过程主要表现为中心大区和边缘次级中心区的面状城市化，中心大区和边缘次级中心区之间沿交通干线的线状城市化以及中心大区与边缘次级中心区之间的点状城市化3种基本模式，其中，中心大区、在城市边缘区的面状成都市化过程在区域内居于优势地位。（2）北京地区城市化过程和城市格局的形成是地形，交通等内在适应性因素和经济因素，政府行为，文化传统，突发事件等外在驱动因素共同作用的结果。其中，城市规划，产业发展政策等政府行为和3000年城市发展形成的旧有城市格局和古都风貌从根本上决定了现代北京城市发展的基本过程。     

西大别浒湾高压变质带变沉积岩锆石U-Pb年龄及地质意义

西大别山浒湾高压变质带是研究秦岭-大别山-苏鲁造山带演化的关键区域, 但是该地区榴辉岩相变质时间还存在较大争议.本文通过对浒湾变质带熊店附近的一个变沉积岩样品进行LA-ICPMS锆石U-Pb定年和微量元素分析, 来确定该地区榴辉岩相变质作用和碎屑锆石的年龄, 并确定该变质带的演化历史.该样品的变质锆石具有弱分带或无分带、低Th/U比值、重稀土含量低且相对平坦以及无明显的Eu负异常等特征.反映这些变质锆石形成时有石榴石, 而缺乏长石, 其形成对应于榴辉岩相变质作用条件.该样品中变质锆石的206Pb/238U加权平均值为310±3Ma, 这一年龄代表了该地区榴辉岩相峰期变质作用的时间, 因此浒湾地区榴辉岩相变质作用时间为石炭纪.碎屑岩浆锆石得到了3组近谐和的U-Pb年龄, 其206Pb/238U年龄变化范围分别为: 400±5Ma~419±5Ma、426±5Ma~449±5Ma以及496±5Ma~524±7Ma, 还有1个颗粒给出了580±7Ma的较老年龄.这些结果表明变沉积岩中的碎屑锆石可能大部分来自于华北板块南缘, 少量来自于扬子板块.      

云南新平县双沟蛇绿岩稀土元素地球化学研究

双沟蛇绿岩中,变质橄榄岩的REE分布型式为LREE富集型,可能是富大离子亲石元素(LILE)组分交代造成的。地幔岩部分熔融生成的初始熔体LREE亏损,而辉绿岩和玄武岩则存在LREE亏损和富集两种型式,前者相当于N-MORB,后者相当于E-MORB。推测前者来源于亏损的软流圈地幔,而后者的地幔源区经历过一次富集LREE和LILE的事件。双沟蛇绿岩的REE特征暗示它可能形成于弧后盆地。     

Comparison of ground truth location of earthquake from InSAR and from ambient seismic noise: A case study of the 1998 Zhangbei earthquake

Because ambient seismic noise provides estimated Green’s function (EGF) between two sites with high accuracy, Rayleigh wave propagation along the path connecting the two sites is well resolved. Therefore, earthquakes which are close to one seismic station can be well located with calibration extracting from EGF. We test two algorithms in locating the 1998 Zhangbei earthquake, one algorithm is waveform-based, and the other is traveltime-based. We first compute EGF between station ZHB (a station about 40 km a...     

1:25万帕度错幅、昂达尔错幅成果与进展

新建9个正式岩石地层单位、4个非正式地层单位;将上三叠统日干配错群解体为6个岩石地层单元;解体中上侏罗统雁石坪群;将色哇组分为三段;将班公湖-怒江带木嘎岗日群解体为4个岩石地层单元;在西藏首次发现(上三叠统姜钟组)纳拉菁耳羽叶;在羌塘盆地首次发现(下—中侏罗统色哇组)辐鳍鱼类化石;新建8个侵入岩填图单位,时代为晚侏罗世—新近纪末期;在班-怒结合带塔仁本一带首次发现了洋岛型玄武岩;新发现了一系列新生代岩浆岩;在班-怒带及南羌塘盆地中发现一些呈串珠状分布的小型斑岩体;发现班-怒带上时代最新的枕状玄武岩。     

莺—琼盆地1号断裂带含烃热流体活动初探

１号断裂带是莺－琼盆地油气勘探的重点地区之一,有机包裹体研究有助于追踪油气及热流体活动的痕迹,为油气运聚成藏提供地球化学依据,通过包裹体薄片镜下观察,均一温度和盐度测试,认为工区内发育五种类型的有机包裹体：（１）液态烃包裹体;（２）气流态烃包裹体;（３）气态烃包裹体;（４）含烃ＣＯ２包裹体;（５）烃子矿物包裹体,含烃ＣＯ２包裹体一般与气态烃共生,含烃子矿物包裹体既无液态烃共生又与气态烃共生,包裹体