塔河六七区鹰山组-巴楚组混积特征研究

受加里东期-海西期构造运动及持续海平面升降变化影响,塔河油田六七区沉积环境复杂多变,中下奥陶统鹰山组和下石炭统巴楚组发育陆屑-碳酸盐混积岩。结合岩心、薄片及测井资料综合分析,混积岩据混积强度分为混积型碳酸盐岩、混积型碎屑岩、高度混积岩。据沉积背景及沉积特征,混积岩成因类型可分为岩溶穿插再沉积型(岩溶型)和相缘渐变型(相变型)。其中,混积型碳酸盐岩和混积型碎屑岩为岩溶成因,高度混积岩为相变成因。此外,混积岩储集空间发育,储集类型主要包括原生粒间孔、次生溶蚀孔缝和构造裂隙,岩溶型混积岩较相变型混积岩储集性能较好。混积岩孔缝中见含油显示,相关油气意义值得进一步研究。     

最小静校正量基准面校正技术在准噶尔盆地LN6井区应用

最小静校正量基准面技术在原理上优于水平基准面一步法校正,实际应用有多大的优势?以准噶尔盆地LN6井区为例,从基本原理、静校正量计算、速度建场,对最小静校正量基准面校正和水平基准面一步法校正进行对比。在构造圈闭目标识别过程中,使用最小静校正量基准面校正技术,构造精度上取得好的成果,提供部署预探井位一口。     

威德尔海的重磁场特征及其构造意义

威德尔海是南极洲最大的边缘海。通过搜集威德尔海的重磁资料、历史文献以及总结前人的相关研究成果,介绍了威德尔海的重磁场基本特征以及指示的构造意义。威德尔海最显著的重力特征是在威德尔海的中北部分布着以鲱骨式结构展布的一系列NW-SE向重力异常,其上可见一系列弧形、上凹的以E-W为主要方向的磁力异常。沿南极半岛陆架边缘的重力高一直可延伸到南侧海域,高值区与陆架平行,但是在磁异常上反映不明显。威德尔海原始海盆的形成约在150 Ma,并伴随南北向张裂,随后在140 Ma发生东西向扩张,到约120 Ma异常形成现代南极洲、非洲和南美洲板块的分布格局,鲱骨式结构异常脊也形成于该时期。     

The Paleoceanography during the Time with High δ13C of Phanerozoic marine carbonates

Carbon isotopic composition of marine carbonates is a record for various important geological events in the process of earth development and evolution. The carbonates of Carboniferous, Permian and Triassic, as the transition from Paleozoic to Mesozoic-Cenozoic have very high ¹³C value. Taking this as the main point, and combined with the oxygen, strontium isotopic composition in carbonates, distribution of carbonate basin area through geologic time, the correlation of carbon isotopic composition of marine carbonates to sea level change, organic carbon burial flux, exchange of CO₂ content in atmosphere and ocean, and long cycle evolution of the earth ecosystems were approached. The results are shown as follows: ①The interval of ¹³C >3‰ during Phanerozoic was concentrated in Carboniferous, Permian and the beginning of Triassic, but the beginning of Triassic was characterized by higher frequency and larger fluctuations in ¹³C value during a short time, whereas the Carboniferous-Permian presented a continuously stable high ¹³C value, indicating a larger amount of organic carbon accumulation in this time interval. Relatively high ¹⁸O values during this time was also observed, showing a long time of glaciations and cold climate, which suggest a connection among rapid organic carbon burial, cold climate, as well as pCO₂ and pO₂ states of atmosphere. ②The over consumption of atmosphere CO₂ by green plants during the time with high ¹³C of seawater forced CO₂ being transferred from ocean to atmosphere for the balance, but the decrease in the seawater amount and water column pressure caused by the global cooling could weaken dissolution capacity of CO₂ in seawater and carbon storage of marine carbonates, and also reduce the carbonate sedimentary rate and decrease the carbonate basin area globally from Devonian to Carboniferous and Permian. During the middle-late Permian carbonate was widely replaced by siliceous sediments even though in shallow carbonate platform, which resulted in the decrease of marine invertebrates, suggesting the Permian chert event should be global. ③The Phanerozoic ⁸⁷Sr/⁸⁶Sr trend of seawater showed a sharp fall in Permian and drop to a minimum at the end of the Permian, indicting input of strontium from the submarine hydrothermal systems (mantle flux). Such process should accompany with a supplement of CO₂ from deep earth to atmosphere and ocean system, but the process associated with widespread volcanism and rises of earth’s surface temperature pricked up the mass extinction during the time of end Permian. ④Cold climate and increase of continental icecap volume, the amalgamation of northern Africa and Laurentia continentals were the main reasons responsible for the sea level drop, but the water consumption result from the significantly increased accumulation of organic carbon should also be one of the reasons for the sea level drop on the order of tens of meters. ⑤The mass extinction at the end Permian was an inevitable event in the process of earth system adjustment. It was difficult for marine invertebrates to survive because of the continuously rapid burial of organic carbon, and of the decrease of sea water amount and its dissolution ability to CO₂. At last, at the end of Paleozoic, the supplement of CO₂ to atmosphere and ocean by widely magma activities resulted in a high temperature of earth surface and intensified mass extinction.     

区域地球化学特征的三维可视化表达

将Delauney三角网模型应用到区域化探数据噪声甄别中,可大幅度提高原始化探数据的分析、观察及校正效率,对区域地球化学异常分析,提供新的思路和方法。本文将东天山地区1∶200 000区域地球化学数据作为实验样本,进行了有效的尝试,取得了较好的效果。     

陕西省能源供给与经济及生态环境协调性分析

作为我国能源供应的战略基地和大西北生态脆弱区,陕西省经济增长和生态环境协调能力关乎国家能源和生态安全,探究陕西省能源供给与经济及生态环境发展(3E)的协调性及关联性具有重要的理论和现实意义。以能源供给为切入点对陕西省3E现状进行定性分析,推断能源供给对陕西省经济增长的结构性支撑作用。选取25个指标构建3E指标体系,运用层次分析、模糊综合评价等方法对各子系统发展水平及各子系统之间协调性进行定量分析。结果表明:(1)陕西省能源供给、经济增长与生态环境间具有较高的协调性;(2)陕西省能源供给、经济增长和生态环境协调关系波动大;(3)能源供给、经济增长和生态环境协调度对能源供给变化具有较高的敏感性。     

Elemental composition and its environmental significance for the varicolored hills in the northern foothills of the Qilian Mountains of Sunan Yugur Autonomous County, China

The varicolored hills in the northern foothills of the Qilian Mountains of northern China, in the Hexi Corridor of Gansu Province's Sunan Yugur Autonomous County, have given this region a unique geomor...     

“9.16”广东旱区罗定特大暴雨灾害天气成因分析

用常规天气观测资料、ncep再分析资料、卫星云图、天气雷达等资料对2009年9月16日出现在广东最少雨区之一的罗定市的强降水特大暴雨过程进行分析,结果表明:"巨爵"减弱后的低压系统移动缓慢,其与西伸的"方头"副高之间气压梯度增大,偏南急流在粤西加强和维持是形成"9.16"暴雨的最主要天气系统;边界层内持续的水汽输送和强辐合上升运动是特大暴雨产生的最主要原因;地面弱冷空气的渗透也为暴雨的产生提供了有利的条件;罗定特殊的地形对此次暴雨的形成也十分有利。卫星云图上罗定上空云系稳定少动和雷达回波上南北向的对流云带中的列车效应是这次强降水过程的显著特点。     

ON REGIONAL DIFFERENTIATION OF RIVER WATER ENVIRONMENT CAPACITY AND STRATEGIES TO CONTROL WATER ENVIRONMENT POLLUTION IN CHINA

ＯＮＲＥＧＩＯＮＡＬＤＩＦＦＥＲＥＮＴＩＡＴＩＯＮＯＦＲＩＶＥＲＷＡＴＥＲＥＮＶＩＲＯＮＭＥＮＴＣＡＰＡＣＩＴＹＡＮＤＳＴＲＡＴＥＧＩＥＳＴＯＣＯＮＴＲＯＬＷＡＴＥＲＥＮＶＩＲＯＮＭＥＮＴＰＯＬＬＵＴＩＯＮＩＮＣＨＩＮＡ￥ＷａｎｇＨｕａｄｏｎｇ（王华...     

溃变图的业务操作系统简介

按溃变理论［１］的不连续或非均匀信息不仅可以预测天气系统的移动性变化和转折性变化，也可以预测降水等天气现象。并已被多次历史例案和应用实践所验证。为了便于投入业务运用，我们利用数据库系统，实现了体现资料信息非均匀和不连续的广义参数在微机、填图机上的自动化处理，完成了收报、计算和填图分析的自动化。本方法体现了预报工具的改革也充分地利用了现有的资料资源