扬子板块石炭纪沉积层序及其全球性对比研究

来源 :沉积学报 | 被引量 : 0次 | 上传用户:jy1794
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
通过对石炭纪扬子板块内部、扬子板块与华北板块及扬子板块与欧美板块之间的不同级别沉积层序对比研究,编制了扬子板块、华北板块和欧美板块石炭纪的海平面变化曲线。在扬子板块内部,上、下扬子区2级沉积层序可以进行对比,但下扬子区海进和海岸上超滞后于上扬子区,由于资料的限制,3级沉积层序的对比还有困难;华北板块Fusulina-Fusulinela带内的一个3级沉积层序和Triticites-Peudoschwagerina带内的四个3级沉积层序,可以和扬子板块同期的3级沉积层序对比;扬子板块和北美中大陆不仅3级沉积层序可以对比,而且在晚石炭世Gzhelian期4级沉积层序也可以进行对比,但由于它们大地构造背景的差异,导致沉积层序组成内容的不同。上述对比结果被认为是冰川型全球海平面变化所形成全球沉积记录同时性的证据。并以冰期与非冰期、联合古陆形成前后等方面对相同板块内和不同板块间沉积层序的数量和级别的异同原因进行了探讨,认为石炭纪冈瓦纳大陆冰川消长是控制全球海平面变化的主要因素,因此,沉积层序应具全球同时性和可对比性,但局部沉积条件差异也将影响沉积层序组成。 By comparing the sedimentary sequence of different levels between the Yangtze block, the Yangtze plate, the North China plate, the Yangtze plate and the European plate in the Carboniferous, the sea level curves of the Yangtze Plate, the North China Plate and the Carboniferous Plate in the United States and China are prepared. In the Yangtze Plate, the upper and lower Yangtze strata can be compared with the second-order sedimentary sequences, but the lag area lags behind the upper Yangtze strata at seaward and coast. Due to the restriction of data, there is still some difficulty in comparing the third-order sedimentary sequences ; A 3-grade sedimentary sequence within the Fusulina-Fusulinela belt of the North China Plate and four 3-s sedimentary sequences within the Triticites-Peudoschwagerina zone can be compared with the 3rd-order sedimentary sequence of the Yangtze Plate; the Yangtze Plate and the North American continent not only The third-order sedimentary sequence can be compared with the fourth-order Gzhelian sedimentary sequence in the Late Carboniferous. However, due to the difference in their tectonic setting, the sedimentary sequence composition is different. The above comparisons are considered as evidence of the global simultaneity of sedimentary records resulting from changes in glacier-shaped global sea level. The similarities and differences of sedimentary sequence numbers and levels within and between the same plate and plate are discussed in the aspects of glacial and non-glacial period and the formation of united ancient land. It is concluded that the glacier growth and decline in the Gondwanaland continent is controlled by the global sea level Therefore, the sedimentary sequence should be global simultaneity and comparability, but the difference of local sedimentary conditions will also affect the sedimentary sequence composition.
其他文献
江西铜厂铜矿床露天采场岩石76个全岩氧同位素组成表明,该超大型铜矿的形成与具有5个水-岩交换成矿体系汇集在一起有关。水-岩体系计算表明,成矿流体储库形成是大气降水与千枚岩和花
应用层序地层学的基本概念和研究方法重新解释了冀中坳陷的下第三系地层。四个层序可从地震剖面和钻井资料中解释出来,每一层序可进一步划分成三个体系域:低水位期、水进期和高
[目的]观察丹葛止痛方联合硝酸异山梨酯治疗冠状动脉粥样硬化性心脏病心绞痛疗效。[方法]使用随机平行对照方法,将64例住院患者按住院病志号抽签简单随机分为两组。对照组32
晚中生代期间,岩石圈的深部过程和构造应力场由左旋压扭(J2-J3)到右旋张扭(J3-K1)的反转变格导致了中国大陆东部大规模的裂陷作用,表现为广泛的火山岩喷发、花岗岩浆侵位、大规模NNE向含油气断陷
文中设计了一种电容加载型同轴滤波器,该滤波器是一种工作在S波段的窄带带通滤波器,通过机械调节谐振腔开路端和谐振腔之间的调谐螺钉来改变其谐振频率和带宽。根据理论分析,
本文利用热解气相色谱仪(Py-GC),对我国吐哈盆地烃源岩样品进行了热解模拟实验,采用等温一级反应动力学模型,求得了烃源岩热解生成油和气的动力学参数,结合地温梯度等地质参数,计算出了吐
运用沉积学和层序地层学研究方法,结合生物地层学,在古地理格局演化和海平面变化分析的基础上,对华北地区下古生界进行沉积相划分和层序地层研究,将下古生界划分为两个超层序和12个
重磁方法是地球物理研究中的重要分支。它们以位场理论为基础,具有在水平方向上的高分辨能力并能够提供地壳深部结构的信息,从而对于研究沉积盆地的形成演化过程起着经济而有效
民初戏剧理论家,中西双重的教育背景、变化繁复的职业生涯、卖文为生的生存现状、勇于抨击社会腐败、提倡民主革命的政治观念都具有鲜明的时代特色。他们是民初特定时代中的
Public administration slogans include oral and written slogans which made by governments at all levels according to the policy or administration under the propa