矿田构造研究方法的技术结构

笔者在多年从事矿田构造研究的基础上,对矿田构造学的工作方法进行结构分析,按主要属性分别归纳为观察与探测技术、测试与分析技术、模拟与实验技术、计算机信息处理技术。这个排列恰好与工作程序大体吻合,并对各类方法的技术项作了简要评述,论及应用的条件、学科交叉关系,以及研究的前沿与热点,并介绍了某些适用的新技术。     

膨润土的工艺特性及其应用

膨润土作为一种非常有用的非金属矿物原料,广泛地应用于工业、农业和其他各个领域。近年来对膨润土的不民研究和开发,进一步拓宽了其应用领域。本文试图对膨润土的工艺特性及其应用途径和现状作一系统概述。     

高性能瞬变电磁仪的研制及应用

瞬变电磁勘探法是目前在地球物理勘探领域里新兴的1种很有前途的测量方法,它简单实用,能测量从浅地表到深层的地质结构。本文介绍了利用工控机组成高性能瞬变电磁仪的方法,并就其应用作了简要介绍。     

Regional debris flow susceptibility analysis based on principal component analysis and self-organizing map: a case study in Southwest China

A method was developed to analyze the susceptibilities of 541 regional basins affected by debris flows at the Wudongde Dam site in southwest China. Determining susceptibility requires information on source material quantity and occurrence frequency. However, the large number of debris flows can hinder the individual field investigation in a each small basin. Factors that may trigger debris flows can be identified using remotely sensed interpretation information. Susceptibility analysis can then be conducted based on these factors. In this study, SPOT5 satellite imagery, digital elevation models (DEM), a lithology distribution map, and rainfall monitoring data were used to identify 12 debris flow trigger factors: basin relief ratio, slope gradient in the initiation zone, drainage density, downslope curvature of the main channel, vegetation coverage, main channel aspect, topographic wetness index, Melton’s ruggedness number, lithology, annual rainfall, form factor, and cross-slope curvature of the transportation zone. Principal component analysis was used to obtain the eight principal components of these factors that contribute to susceptibility results. Then, a self-organizing map method was adopted to analyze the principal components, which resulted in a debris flow susceptibility classification. Field validation of 26 debris flow basins was used to evaluate the errors of the susceptibility classification, as well as assess the causes of such errors. The study found that principle component analysis and self-organizing map methodologies are good predictors of basin susceptibility to debris flows.     

测井方法在湖南测水煤系中的应用

测水煤系是湖南分布较广、储量丰富的含煤地层之一。对于结构简单,灰份较低的煤层,可以通过异常明显的自然伽马低异常与伽马伽马高异常加以判别。但在结构复杂、挤压破坏强烈、薄煤分层、夹矸与顶底围岩炭化程度高、煤与围岩及夹矸物性差异小等情况下,仅靠自然伽马与伽马伽马等常规测井方法难以满足测井质量验收标准。以浆江勘探区3909孔、3503孔及金竹山矿区7403孔为例,利用伽马伽马短源距、三侧向、声速及密度等测井方法,结合常规自然伽马与伽马伽马测井,较好地解决了复杂结构煤层的定性、定厚问题,取得了较好的地质效果。     

Petrogenesis of the Early Cretaceous Laojunshan monzogranite at the southern margin of the North China Craton: Constrains on the transition of the tectonic regime

<正>1 Introduction Voluminous Mesozoic magmatic rocks containing abundant Au-Mo polymetallic mineralization resources are developed in the Xiaoqinling-Xiong’ershan district of the southern margin of the North China Craton(NCC).     

西藏玉龙铜矿床次生氧化富集作用机制

作文阐述了西藏玉龙铜矿床成矿过程中的“沉积初步富集期”和“西藏玉龙铜矿床次生氧化成矿作用模式”,这不仅对指导当前生产具有重要的现实意义,而且为在玉龙铜矿带进一步找矿共作劈了新的方向。     

“Three-Component” Digital Prospecting Method：A New Approach for Mineral Resources Quantitative Prediction and Assessment

“Three-component” method consists of three clase-connected aspects: geological anomaly,diversity of mineralization and mineral deposit spectrum. All these three concepts are not new separately, but it is a new approach to combine these three aspects in one single concept for quantitative mineral resources prediction and assessment and it is also the first time to conduct a more detailed study in each aspect. Investigation and clarification of geological anomalies, diversity of mineralization and spectrum of mineral deposits are realized by digitization and quantification of ore forming controlling factors, oreexisting symbols or marks, characteristics of mineralization and regulation of ore-genesis and laws of distribution. These procedures lead to construction of a “digital model“ for mineral resources prediction andassessment.     

汶川地震与山崩地裂的极高压甲烷天然气成因和机理

笔者提出和论证了,汶川地震是由地壳深部一股海量异常高密度、高压甲烷天然气体突然破裂,逃出其闭圈围岩,再沿龙门山深大叠瓦状推覆断裂和不整合接触带,高速运移、膨胀、破裂和喷出岩层和断层造成的。山崩是一股高压气体高速运移到坚硬岩体山坡内部,将它们胀裂和快速推移造成的。地裂是一股高压气体高速运移到松软土体平地内部,将它们顶起变形和快速拉剪断裂造成的。     

Research on the fault controlling mechanism of geothermal water in Zhangzhou Basin

Fault has an important influence on the storage and movement of geothermal water. The Zhangzhou Basin is wholly located in a granodiorite rock mass. Due to the low permeability of granodiorite, faulted structure has an evident control action on the hydrothermal activity of geothermal fields. Hot springs in Zhangzhou Basin crack along Pingtan-Dongshan Fault to the northeastern direction and emerge along Fu’an-Nanjing Fault. Through measurement of the temperature of several hot springs in the Basin, we found the temperature along the northwestern direction of Zhangzhou-Tianbao Fault is high and the temperature gap between the two sides of Yangxi-Yuanshan Fault is huge; the estimation of geothermal reservoir temperature of geothermal water through quartz geothermometer indicates that the geothermal reservoir temperature of the northern area of Nanjing-Xiamen Fault is obviously higher than that of southern area. Such result indicates that Fault obviously obstructs underground heat source. Under the condition that the average geothermal gradient of the Zhangzhou Basin is set, the circulation depth of the geothermal water of the Zhangzhou Basin measured by geothermal reservoir temperature is 3 550-5 200 m and the circulation depth of the geothermal water of the north of Nanjing-Xiamen Fault is deeper than that of the South.