上新世——早更新世青藏高原北缘隆升的磁性地层学证据

对新疆叶城剖面西域砾岩及下伏第三纪地层的磁性地层学研究表明 ,西域砾岩的沉积时代为晚上新世至早更新世 ,磁性地层年龄为 3.5至 <1.8Ma。阿图什组沉积于早上新世 ,古地磁年龄为 4 .6～ 3.5 Ma。阿图什组以砂岩和粉砂岩为主夹薄层砾岩 ,为河流相及冲积扇前缘相。西域砾岩以厚层砾岩为主夹风成粉砂岩 ,为典型洪积—冲积扇堆积。西域砾岩的沉积反映了青藏高原北缘晚上新世至早更新世强烈的隆起和剥蚀     

Paleomagnetism of the Esterel rocks: a revisit 22 years after the thesis of Hans Zijderveld

For his PhD. thesis, Zijderveld (1975) studied the paleomagnetism of the Permian Esterel rocks (southern France). High-quality thermal and alternating-field demagnetization diagrams were interpreted to determine the direction of the characteristic natural magnetization. For the Esterel volcanics, a mean direction of Dec = 206.5°, Inc = –23°, ₉₅ = 5.7°, k = 112 was found for this magnetization. The dispersion in this mean is remarkably low. Only the declination of the Reyran Rhyolite in the Reyran River quarry clearly deviated from this mean. This deviating direction is not found in our samples, taken at the same site. As many faults occur in this quarry, it is suggested that Zijderveld sampled this rhyolite on a small rotated block. To verify whether the small dispersion in the mean paleomagnetic direction of the Esterel rocks has a geomagnetic or a rock-magnetic origin, two conglomerate tests were carried out. One of these might be interpreted as positive. The results of the other conglomerate test (Agay Formation) are ambiguous: four of the six measured boulders show directions close to the mean paleomagnetic direction of the Esterel rocks. Rock-magnetic measurements show that the remanence is carried by a magnetite and a hematite fraction. The low dispersion in the paleomagnetic directions, the conglomerate tests, and hematite as remanence carrier suggest that the characteristic remanence in the Esterel volcanics was not instantaneously acquired during cooling, but might be affected by remagnetization due to weathering.     

玛纳斯河一级电站引水渠沿线提取地下水进行融冰的可行性研究

通过对向斜洼地含水层水文地质特征的勘探及研究,对研究区的水文地质边界条件进行了概化,并用水均衡法估算了地下水资源量,对拟建一级电站引水渠沿线提取地下水进行融冰的可行性进行了研究,并提出了取水方案.     

陕西洛南陶湾群三岔口组砾岩研究

陶湾群三岔口组砾岩是一套分布于华北地块南缘的水下碳酸盐岩型重力流沉积，砾岩的形成同商州铁炉子栾川断裂带早期活动性质存在因果关系。通过１∶５万区调填图发现，陶湾群三岔口组砾岩从母岩区到砾岩堆积区之间无断陷作用；沉积基底基本连续；砾岩沉积组构出现有序的横向变化规律，依次为母岩区层状白云岩（α区）、具有垂向张裂隙及流动构造的始滑区白云岩（β区）、具有节状构造的滑移区白云岩（γ区）和砾岩堆积区（δ区）。陶湾群三岔口组砾岩时代厘定为早寒武世晚期至中寒武世，这也是华北地块南缘盆地环境的主形成期，砾岩是在东秦岭洋向华     

赣北修水观音阁砾岩特征及其构造意义

有关赣北地区双桥山群内角度不整合和地壳运动存在与否问题,一直争论不休。论文以较丰富的详细野外调查资料为基础,并结合前人研究成果和室内各类样品测试结果,围绕这个赣北地区重要的基础地质问题进行了讨论。作者认为“修水运动”不能成立,并提出了砾岩的沉积模式。     

砾岩在不同矿化度下的岩电参数变化规律

为解决地层含油饱和度计算误差的问题,用不同矿化度地层水进行了地层因素和电阻增大率的实验,发现了砾岩储层岩电参数的变化规律。进一步有效地利用这一规律可以对含油饱和度的计算误差进行校正,从而修正开发储量中的计算误差。这一规律的研究对克拉玛依砾岩油藏的开发具有重要的指导意义。     

滇中地区因民角砾岩类型、特征及找矿意义

滇中地区“因民角砾岩”的成因及归属问题目前暂无定论。笔者通过对东川-易门地区前人所划的因民组“因民角砾岩”进行1：5万野外地质调查工作,对其进行了初步的分类。根据其成因及时代划分为复成分砾岩、冰碛砾岩、滑塌角砾岩、引爆角砾岩和构造角砾岩。对“因民角砾岩”成因及时代的研究,特别是“冰碛砾岩、复成分砾岩”的提出,对于解决滇中早前寒武纪地层层序、时代归属、构造格架、大地构造位置及大区域地层对比,探讨滇中元古宙地史演化、古环境研究以及指导找矿都具有重要的指示意义。     

The Caledonian Structures of Shetland – Funzie and Norwick Geological Conservation Review sites

Locations at Funzie on the island of Fetlar, and at Norwick on the island of Unst contain excellent examples of structures relating to the Caledonian age disruption and emplacement of the Shetland Ophiolite Complex. The Caledonian age Shetland Ophiolite Complex contains exceptionally well developed and exposed sections of the lower parts of the characteristic ophiolite sequence, including layered gabbro, cumulates and mantle rock. Composed of two tectonic units (the Lower Nappe and Upper Nappe) each underlain by an imbricate zone, it is among the finest and most accessible examples of ophiolitic rocks in Europe. The sites at Funzie and Norwick have been selected to be part of the Caledonian Structures of Great Britain Geological Conservation Review (GCR) network, as the best examples in Britain of structures relating to Caledonian ophiolite disruption and emplacement. As the Funzie GCR site and the Norwick GCR site they form the Caledonian Structures of Shetland GCR block.Accounts of all other sites in the Caledonian Structures of Great Britain Geological Conservation Review (GCR) network are already published (Treagus, 1992). Accounts of the Caledonian Structures of Shetland GCR block sites are, therefore, presented in this paper to complete publication of the Caledonian Structures of Great Britain Geological Conservation Review (GCR) network.     

利用毛管压力曲线分形分维方法研究流动单元

利用取心井铸体薄片获得的图像资料和毛管压力曲线,通过图像分形几何学方法以分维数的形式定量地表征出了复杂的微观孔隙喉道结构特征,发现能够很好地划分和评价孔隙岩石中油、气、水的渗流差异,可以用于储层微观流动单元表征。文中阐述了岩石微观孔隙喉道结构分形的理论基础、计算方法和应用于表征流动单元的依据。建立了中国西部砾岩低渗透油藏微观孔隙喉道分维数与孔隙度、渗透率之间计算图版,据此在油藏中利用常规测井资料获得的孔隙度、渗透率参数计算微观孔隙喉道分维数,开展全油藏流动单元划分与评价,取得了良好的效果。研究结果表明,利用毛管压力曲线分形分维方法研究储层微观流动单元是一种很有效的途径。     

伊朗卡尔赫水电站坝址松散砾岩钻探工艺

在伊朗卡尔赫水电站坝址工程勘察中，采用金刚石双管单动钻具和ＳＭ胶冲洗液进行取样钻探，用清水钻进压水试验，由于钻探工艺合理，钻探质量均达到了设计要求。