Hydrogen isotopic compositions, distributions and source signals of individual n-alkanes for some typical crude oils in Lunnan Oilfield, Tarim Basin, NW China

Petroleum mainly comprises carbon and hydrogen elements. The stable carbon isotopic analysis for whole oil was undertaken as early as the 1930s. After decades, the stable carbon isotopic analytical methods have been developed from analysis for whole oil and oil fractions (e.g., saturated, aromatic and polar frac-tions) into compound-specific isotopic analysis with the emergence of the newly developed GC-C-IRMS analytical technique. Especially, by using com-pound-specific isotopic analytical…     

地质热年代学及其应用

本文简单介绍地质热年代学的含义、应用和进展，并重点介绍了裂变径迹与40Ar/39Ar热年代学     

岩土锚固技术在边坡工程中的应用

通过对一个实际边坡工程的分析，拟定以预应力锚索、土钉墙、喷锚支护等岩土锚固技术为主的加固方素。采用极限平衡原理进行稳定分析和剩余下滑力的计算，参考相关技术规范进行锚索和土钉墙的设计验算，结合现场试验验证锚索的可靠性并确定施工工艺，成功实现了该边坡的加固。实践表明，岩土锚固技术在边坡工程中具有方便快捷、经济可靠的突出优势。     

南岭山地高速公路路面温度变化特征分析

使用2003年3月至2005年8月南岭山地京珠高速公路粤境北段云岩路段3套自动气象站的逐分钟路面温度、地温、气温、湿度、风向、风速等气象资料,分析研究了南岭山地高速公路的路面温度特征及其与天气状况、气温、风速等气象条件的关系,并讨论了地形对南岭山地高速公路路面温度的影响。研究结果表明,南岭山地高速公路晴天和多云时的路面温度日变化明显,与辐射过程密切相关。路温与气温、地温的差异在晴天午后最为明显。晴天时路温、地温、气温的年变化趋势比较一致,路温与地温之间保持着明显的温差;多云天气时路温与地温的差值明显缩小,阴天时路温与地温的差值非常小。地形对路面温度有明显影响,高海拔地区路面温度相对较低,南岭北坡路面温度明显高于南坡,与局地小地形有关。高温过程时路面温度最高接近60℃,地温也超过50℃,持续高温对行车安全、路面和路基结构均有很大威胁。     

独山县农业银行业务系统雷击灾害风险评估

根据相关技术规范，通过对独山县农业银行业务系统雷击风险评估尝试，探讨县级电子信息系统雷击风险评估思路、方法。     

LA-ICPMS Zircon U-Pb Dating in the Jurassic Daohugou Beds and Correlative Strata in Ningcheng of Inner Mongolia

LA-ICPMS Zircon U-Pb dating is applied to volcanic rocks overlying and underlying the Salamander-bearing bed in the Daohugou beds of Ningcheng in Inner Mongola and Reshuichang of Lingyuan and Mazhangzi of Jianping in western Liaoning. The results indicate that the youngest age of the rocks in Daohugou of Ningcheng is 158 Ma, and the oldest one is 164 Ma. Synthesized researches indicate that the salamander-bearing beds in Daohugou of Ningcheng, Reshuichang of Lingyuan and Mazhangzi of Jianping were developed in the same period. The Daohugou beds were formed in the geological age of 164-158 Ma of the middle-late Jurassic. Whilst, the Daohugou beds and its corrdative strata should correspond to the Tiaojishan Formation （or Lanqi Formation） of the middle Jurassic in northern Hebei Province and western Liaoning Province, based on the disconformity between the Daohugou beds and its overlaying beds of the Tuchengzi Formation of Late Jurassic and the Jehol Beds of early Cretaceous, and the disconformity between the Daohugou Beds and its underlying Jiulongshan Formation, which is composed of conglomerate, sandstone, shale with coal and thin coal beds.     

云南思茅三叠纪弧后前陆盆地的沉积特征

思茅盆地位于古特提斯构造域的东段,西侧为澜沧江造山带,东侧为哀牢山造山带.三叠纪沉积盆地建立在晚古生代褶皱基底之上,形成于古特提斯洋闭合后,造山早期的弧陆碰撞阶段.前人提出过后陆盆地、滞后型弧后盆地、裂谷盆地和前陆盆地等多种认识.本文通过对盆地形成的地球动力学背景及盆地内沉积体的性质、结构、时空叠置关系、古流向、特殊沉积体的时空展布及其所表现出的盆地沉降中心的迁移规律等方面的系统研究,认为思茅三叠纪盆地属弧后前陆盆地,其演化阶段始于中三叠统安尼期以前,盆地主要受控于澜沧江造山带,晚三叠世晚期受哀牢山造山带影响,具有复合式前陆盆地特点,三叠纪末过渡为陆内拗陷盆地。     

非线性地球化学动力学

非线性地球化学动力学的研究主要包括五个方面：①地球化学非线性反应动力学;②矿物沉淀、结晶与生长的非线性动力学;③流体流动－反应耦合的非线性动力学;④力学－化学耦合的非线性动力学;⑤地球化学循环的非线性动力学或非线性全球动力学。分别总结了上述五个方面的研究进展,讨论了地球化学非线性动力学研究中存在的问题和今后的发展方向。     

湖南湘西金矿尾矿的地质地球化学特征与二次开发前景

对湖南湘西金矿尾矿的堆存,分布特征及其化学组成,微量元素含量等进行了初步研究,结果发现：尾矿中贵,重金属元素如Ａｕ,Ｓｂ,Ｗ,Ｐｂ,Ａｓ等含量较高,因此,尾矿不仅是矿区的潜在污染源,而且是一种重要的后备资源,具有较大的二次开发前景。     

泵吸反循环砂石泵不出水的原因分析与防治

反循环钻探工艺清渣彻底,能保证桩基质量,无需二次清孔,从而缩短工期,提高效率。但在施工中,常常出现砂石泵不出水的现象,耽误时间,影响效率。必须找出症结所在,及时排除故障。结合实践有如下体会。青岛石老人度假区自助公寓位于黄海之滨,在强风化花岗岩上覆盖着...