广西丹池晚古生代沉积盆地的演化及控矿作用

右江海西期盆地主要归属于古特提斯构造域,具有大陆边缘裂谷盆地的性质,丹池盆地是该裂谷盆地靠近古陆边缘的次级裂陷盆地。丹池盆地的演化可分为陆内裂陷、被动陆缘裂陷、走滑裂陷、强烈拗陷和充填-关闭五个阶段。丹池锡-多金属矿带具有以断裂活动为主导,构造、地层、岩相、岩浆岩和矿床五位一体的成矿特点。讨论了海底火山喷气沉积-成岩交代、充填后期岩浆热液叠加改造的复合型矿床成因。     

四川盆地内的一次暴雨天气过程分析

对1986年6月13～16日四川盆地内的暴雨天气过程中物理量的诊断分析,得出暴雨天气过程中各物理量间的特殊对应关系,指出在中纬度地区暴雨天气的激发条件不仅是正压不稳定和斜压不稳定,在水汽条件较充分的情况下,CISK的作用也不可忽略。     

非水平长铺盖土坝渗透分析方法

根据达西定律给出了有限深透水基础上的土坝，考虑非水平长铺盖渗漏影响的渗透分析方法，为确定库盘防渗范围的最优方案提供了理论依扰和方法。     

山区积温分布推算方法的研究

积温是农业气候热量资源的重要指标。本文提出了山区积温的推算方法、得出了各种小地形的积温效应值。该方法在福建省沙溪流域山区实际应用的结果是令人满意的。     

福建省沿岸港湾余流的特征

对1980—1986年的福建省5个港湾79个测站的海流观测资料进行分析,得出福建省沿岸港湾的余流具有以下几个值得注意的特征:(1)港湾口门处的表层余流和底层余流流向大致相反;(2)在“口小腹大”的港湾中,表层余流存在着余流环流,而底层余流环流则随着水深的不同而具有不同的特点;(3)河口区的底层余流可形成辐合区,而表层余流则一致流出河口.     

鄂尔多斯盆地构造与耦合成矿关系思考

目的探索多种矿产耦合成矿的盆地构造动力学问题。方法综合剖析鄂尔多斯盆地构造与油、气、煤和砂岩型铀矿等多种矿产共存富集的时空配置关系。结果鄂尔多斯盆地多种矿产相互关联、共存富集于古生界和中生界的不同地质层位，促使它们耦合成矿的时代主要发生在晚侏罗-早白垩世的燕山中晚期，主体受控于中新生代多构造演化及其关键变革时期的构造转换过程。结论探索、研究鄂尔多斯盆地中新生代构造动力学演化及其叠加转换关系，有助于客观认识多种矿产共存富集可能受控的统一盆地动力学环境及其耦合成矿效应。     

邛海流域生态脆弱性研究

简述了生态脆弱性的概念,从自然和人为干扰两个方面分析了邛海流域的生态脆弱性特征及其成因,并对解决邛海流域的生态脆弱性问题提出了相关的建议。     

川西前陆盆地须家河组沉积相及岩相古地理演化

川西前陆盆地上三叠统须家河组是油气勘探的重点层位.依据新的地层划分方案、大量钻井、露头及岩芯资料,结合区域地质特征,详细研究了须家河组沉积相、岩相古地理特征及其演化.结果表明:研究区内主要发育了冲积扇、湖相三角洲、湖泊、海相三角洲、滨岸和海湾六种主要的沉积相类型;古地理演化经历了由海相环境-海陆过渡相环境-陆相环境的转变;在须四早期,受安县运动的影响,龙门山褶皱成山,使研究区与阿坝海域完全隔绝,整个四川盆地真正进入了陆相沉积环境.     

Abnormal high pressure in Kuqa foreland thrust belt of Tarim basin: Origin and impacts on hydrocarbon accumulation

Following analyses of the abnormal high pressure distribution characteristics, based on the geological characteristics, tectonic stress field and physical simulation, we investigated the formation mechanisms of abnormal high pressure and its impacts on hydrocarbon accumulation in the Kuqa foreland thrust belt. The abnormal high pressure appears at the bottom of the Paleogene and obviously exists in the Triassic and Jurassic. However, the pressure coefficient in the Triassic and Jurassic is lower than that in the Cretaceous and at the bottom of the Paleogene. Horizontally, the abnormal high pressure distribution is characterized by E-W orientation zoning. The maximum pressure coefficient lies in the Kelasu-Dongqiu-Dina tectonic zones in the center of the Kuqa foreland thrust belt and decreases away from the tectonic zones. The formation of abnormal high pressure was mainly related with the intense tectonic compression in the Early Pleistocene time, and tectonic uplifting, undercompaction and hydrocarbon generation were secondary factors contributing to abnormal high pressure. Under the rapid and intense tectonic compression in the Early Pleistocene, the rock framework firstly undertook 1/4 of the compression stress and the other was borne by the pore fluids. Due to the presence of great seal of gypsum-salt or gypsum-mudstone beds in the Paleogene, the pressure of pore fluids increased rapidly and led to the abnormal high pressure in the Kuqa foreland thrust belt. The abnormal high pressure has important impacts on hydrocarbon accumulation. It is one of the necessary conditions for formation of large oil and gas fields in the Kuqa foreland thrust belt.