大理点苍山正片麻岩初步研究

点苍山正片麻岩分为两类：斜长片麻岩和花岗片麻岩。前者属岛孤火山岩，形成于中晚元古代。二者主要化学组分具相关性，花岗片麻岩是由早形成的斜长片麻岩、斜片角闪岩经深熔作用而成。     

碳酸盐岩锶同位素比值测定中的残渣分析

通过对经HAc溶解后的碳酸盐样品的残渣进行分析，验证了碳酸盐岩中所合非碳酸盐组分的^87Sr／^86Sr同位素比值较高的事实，同时也论证了HCl溶解碳酸盐岩样品的不足，即造成非碳酸盐的溶解，从而导致^87Sr／^86Sr同位素比值质谱测定结果偏高。     

建立信息产业统计学的若干基本问题探讨

发展信息产业,需要对信息产业的现状及其未来发展趋势有清晰的认识,需要设置统一的统计指标体系和分析方法,建立信息产业统计学.论述了建立信息产业统计若干基本理论问题.     

埕岛油田海底管道工程海域环境现状及质量评价

利用实测资料采用《中国近海水质评价方法》对工程海域环境现状进行分析和质量评价。结果表明工程海域水体主要污染为有机污染和石油污染,主要污染物为无机氮、无机磷、石油类、铅、海域为三类海水。靠近采油平台、油井组的站位水质差,远离平台、井组水质较好,说明海上石油开发带来了一定的污染。工程海域内的底质尚未受到污染。     

辽西小盘岭金矿床地质特征及找矿方向

小盘岭金矿是一个与次火山岩有关的隐爆角砾岩型金矿床。隐爆角砾岩筒产于太古宙混合花岗片麻岩中 ,受近EW向刘家沟断裂控制 ,在近EW向断裂与NW向次级断裂交汇部位 ,角砾岩岩筒最为发育 ,金矿体产于隐爆角砾岩筒内并严格受其控制。 1号主矿脉圈出 5条工业矿体 ,长一般 6 6～ 30 3m ,最大厚度 11 70m ,平均厚 2 2 7m ,平均品位 5 6 3× 10 - 6 ,单独构成了小盘岭金矿床     

去除探地雷达信号直达波的小波变换方法

简单介绍了二维连续小波变换的基本理论，详细分析了二维连续有向小波变换去除直达波的基本原理，对比了二维Cauchy小波及Morlet小波函数的性质，进而讨论了实际工程应用中小波函数的选择问题。通过实际工程探地雷达资料检验了该方法的有效性。     

Handling dip discrimination phenomenon in common‐reflection‐surface stack via combination of output‐imaging‐scheme and migration/demigration

In the application of a conventional common‐reflection‐surface (CRS) stack, it is well‐known that only one optimum stacking operator is determined for each zero‐offset sample to be simulated. As a result, the conflicting dip situations are not taken into account and only the most prominent event contributes to any a particular stack sample. In this paper, we name this phenomenon caused by conflicting dip problems as ‘dip discrimination phenomenon’. This phenomenon is not welcome because it not only leads to the loss of weak reflections and tips of diffractions in the final zero‐offset‐CRS stacked section but also to a deteriorated quality in subsequent migration. The common‐reflection‐surface stack with the output imaging scheme (CRS‐OIS) is a novel technique to implement a CRS stack based on a unified Kirchhoff imaging approach. As far as dealing with conflicting dip problems is concerned, the CRS‐OIS is a better option than a conventional CRS stack. However, we think the CRS‐OIS can do more in this aspect. In this paper, we propose a workflow to handle the dip discrimination phenomenon based on a cascaded implementation of prestack time migration, CRS‐OIS and prestack time demigration. Firstly, a common offset prestack time migration is implemented. Then, a CRS‐OIS is applied to the time‐migrated common offset gather. Afterwards, a prestack time demigration is performed to reconstruct each unmigrated common offset gather with its reflections being greatly enhanced and diffractions being well preserved. Compared with existing techniques dealing with conflicting dip problems, the technique presented in this paper preserves most of the diffractions and accounts for reflections from all possible dips properly. More importantly, both the post‐stacked data set and prestacked data set can be of much better quality after the implementation of the presented scheme. It serves as a promising alternative to other techniques except that it cannot provide the typical CRS wavefield attributes. The numerical tests on a synthetic Marmousi data set and a real 2D marine data set demonstrated its effectiveness and robustness.     

井中油气地球化学勘探技术预测和评价碳酸盐岩储层研究

井中油气地球化学勘探技术(简称井中化探)是20世纪90年代初油气勘探领域兴起的一种新技术,在钻井过程中预测、判别油气储层具有独特的优势.本文以塔里木盆地巴楚隆起的BC1井及鄂尔多斯盆地塔巴庙区块的D6井为例,在研究石油地质资料的基础上,根据已有的井中化探成果发掘油气地球化学信息,重点描述了碳酸盐岩储层的油气地球化学异常特征,指出了碳酸盐岩储层与碎屑岩储层地球化学异常模式的差异,对碳酸盐岩中的油气层进行预测和判别,为生产单位提供有价值的地化依据.     

滇西北横断山区的旅游资源及其开发研究——21世纪中国极具开发潜力的旅游区

滇西北横断山区, 由于地质的强烈作用, 形成怒江、澜沦江、金沙江三江相间并流的地貌大奇观, 有众多峡谷和高大雪山群, 低纬低海拔的冰川。气候多样, 生物资源品种繁多, 垂直地带性非常明显, 集聚了最壮丽的自然风光。藏、纳西、白、彝、傈僳、怒、独龙、普米、回等民族聚居, 社会发展层次有先有后, 有人类社会发展的博物馆之称, 民族风情浓郁。大理、丽江、巍山３ 座国家级历史文化名城, 与众多民族文化和民族风情融为一体。随着香格里拉在滇西北的定位以及丽江古城被列为人类文化遗产, 人们揭开了这块神秘土地的面纱。它是２１ 世纪中国极具开发潜力的旅游热点。     

甘肃河西地区人口,资源,环境与经济可持续发展研究

分析了河西地区人口、资源、环境及经济发展的优势、现状和存在的主要问题；指出了经济持续发展的机遇和挑战；提出了以科学技术为动力，推动经济的快速发展，以水资源为杠杆，建立节水型绿洲经济体系，保护绿洲生态环境，推进绿洲城市化进程和发展旅游业等区域经济持续发展的对策