地质

, 5. 0±0.4 ‰. They are different obviously from those of fossil brachiopods in other paleozoic periods and modern shells.

因此无论是δ〓O，还是δ〓C都与古生代其它地质时期以及现代腕足生物壳体存在很大差别，表明地质历史时期碳酸盐岩的原始氧、碳同位素组成并不是稳定不变的。

Based on the case of urban geologic survey in Guangzhou, the paper introduces data collection method used in shallow exploration in process of seismic transverse wave detection, and analyses the geologic explanation for results as well as divides the strata in this way coupled with method of well logging.

并以广州市城市地质调查项目为例，介绍了地震横波勘探在浅层地层勘测中的数据采集方法，分析了地质解释依据，并结合波速测井方法对地层层面进行了划分。

The result of the study was consistent with the conclusions of the a-nalysis of the structural geology and petroleum geology.

研究结果与构造地质及石油地质分析结论相一致。

Structural Geology A is a brach subject and base of geology ,.

是一门地质专业基础课，研究的对象是地壳或岩石圈中，小尺度的地质构造。

The subject of Structural Geology mainly trains the ability of students in observation, description, analysis, and solution of the problems in structural geology.

构造地质学课程培养学生观察、描述、分析地质和综合解决地质问题的能力。

Zhangtianqu oilfield locates in the center of Yixia west slope, Ordos Basin. The field has a complex hydrocarbon-bearing bed set. On principle that lithology and reservoir can be identified, geologic parameters such as shale content, porosity, and oil saturation can be determined and be used to distinguish oil-bearing formation from water formation, as well as costeffectiveness, an improved logging interpretation model has been established. The model extends conventional single porosity interpretation methodology to identify various lithologies (such as coal seam, radioactive sandstone, carbonate rock besides sandstone and shale) by comprehensively analyzing the logging responses of sand reservoirs on economic logging set of acoustic logs and induction logs. Applications on real data show the improved model is superior in identifying complex lithology with conventional logging data.

张天渠油田位于鄂尔多斯盆地伊陕斜坡西部中段，该油田含油层系复杂，在岩性地质特征分析时，本着&能确定岩性，划分储层，提供泥质含量，孔隙度，含油饱和度等地质参数，区分油层，水层，以及经济适用&的原则，选用经济适用的声感组合测井系列，通过综合分析砂岩储层的测井响应特征，对传统单孔隙度解释方法进行改进，增加识别多种岩性成份(除砂岩，泥岩外，局部含有煤岩，放射性砂岩，碳酸盐岩等复杂岩性)的功能，建立了适合该油田的测井解释模型，提高了利用常规测井资料识别复杂岩性的能力和测井参数的解释精度，为油田勘探开发提供依据。

Using the method integrating geoscientific research with bit selection research, analysis is made on the stratigraphic-lithologic characteristics of all geological intervals in the area, the effect on bit selection and how to increase drilling speed is made clear. Based on the above, the conceptual profiled design for bit selection and drilling methods of all geological intervals is proposed on the basis of the stratigraphic-lithologic characteristics.

应用地学研究与钻头选型研究相结合的方法，对该地区各地质层段的地层产状与岩性特征进行了分析，获取了钻头选型对提高钻井速度影响的认知，提出了基于地层产状与岩性特征的各地质层段钻头选型及其钻井方式的轮廓化概念设计。

The Hengduan Mountains have undergone dramatic geological and climatic changes over the Pleistocene. The population structures of animals in this region have been significantly influenced by geographic changes and repeated glacial events during the Pleistocene, especially the last glaciations.

中文摘要：摘要：横断山区地质地貌复杂，历史上经历了剧烈的抬升和循环的冰期，这些地质和气候变化对物种的分化产生了重要的影响。

Xiaowan arch dam site has excellent topographic conditions, while geological structures in both abutments are complex, such as, faults, altered rock, mantle rock, etc.

在建的小湾水电站坝址具备修建高拱坝的优越地形条件，但地处西南地区著名的&三江构造带&的南段，地质构造较复杂，坝基及坝肩抗力体内存在部分断层、蚀变岩体和卸荷、风化岩体等地质缺陷，将引起两岸坝肩岩体变形不对称、压缩变形量增大以及坝肩局部岩体承载能力低，直接影响到拱坝与地基系统的正常运行和整体稳定安全性。

Palaeontologists successfully obtained the essential information of palaeo-CO2 change form fossil plant leaves. This method has been recognized as one of the effective approaches for tracking paleo-CO2 information from geological record.

古生物学家通过对植物化石叶片的研究，成功地获取了地质历史时期古大气CO2浓度变化的信息，因而这一方法日益受到科学界的重视，被认为是从地质记录中获取古大气CO2浓度的最有效途径之一。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新