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论层序地层与岩石地层单位之间的关系:兼论沉积岩区1:5万区域 … 总被引:5,自引:0,他引:5
从时空关系出发讨论层序地层不与岩石地层学等分支学科之间的关系。建议采用两类主要地层分类系统的多重地层划分方案,把层序地层单位作为相对独立的辅助性地层单位。简述了层序地层单位与岩石地层单位之间的几种关系。把层序地层方法用于山东淄川,文祖幅区调中,提出在沉积岩区1:5万区调中填制“层序-组图”的双重表示方法。 相似文献
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庐山地区第四纪岩石地层单位划分 总被引:1,自引:0,他引:1
庐山地区第四纪地层发育,成因类型复杂,岩性岩相变化大,我队在1:5万区调中以沉(堆)积物为客观实体,应用多重地层划分理论,进行了岩石地层单位的划分与填图,并对气候地层、年代地层、生物地层进行了划分与对比,初步建立了庐山地区第四纪地层层序。 相似文献
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通过大量寒武系剖面测制和1:5万区调填图,将该区寒武系划分为7个三级层序。在系统讨论每个层序地界面性质、组成和对比的基础上,初步建立了被动大陆边缘浅水区岩石地层格架,阐述和探讨了沉积盆地演化发育特征。 相似文献
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藏南洛扎地区侏罗纪—早白垩世层序地层与地层格架——兼论基本层序变化规律调查在区调工作中的运用 总被引:1,自引:0,他引:1
根据米级旋回垂向上的变化规律,新特提斯洋北缘北喜马拉雅被动大陆边缘的沉积层序自侏罗纪—早白垩世共可划分二级层序3个,三级层序18个。早、中侏罗世低位体系域不发育,由海进体系域与高位体系域两部分组成。晚侏罗世出现大型深切河谷。海平面下降幅度最大。早白垩世发育陆架边缘体系域。在此基础上建立了测区侏罗纪—早白垩世地层格架。讨论了当前1∶〖KG-*2〗25万、1∶〖KG-*2〗5万区调填图过程中岩石地层单位内基本层序调查应从静态的代表性基本层序描述转变为动态的基本层序变化规律的调查,阐明了基本层序变化规律与层序地层的关系。 相似文献
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在1:25万区域地质调查基础上,通过对宿松—东至地区南华纪-志留纪地层露头剖面研究,对其相应的沉积环境、沉积相进行了分析,并根据生物地层、岩石地层和年代地层等成果,将南华纪-志留纪地层划分为1个一级层序,5个二级层序和15个三级层序组。一级和二级层序在沉积相序上总的趋势表现为浅→深→浅的变化,且与海平面变化曲线相吻合;三级层序组海平面上升和下降往往受构造运动、海平面变化;冰川事件影响。 相似文献
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西藏北部申扎地区志留纪岩石地层和生物地层 总被引:2,自引:3,他引:2
在开展西藏北部多巴区幅1:25万区域地质调查时,对分布于申扎地区的志留纪地层进行了详细的研究和划分,厘定了该区志留纪岩石地层单元,建立了生物地层层序。首次提出了该区志留系四分方案,并为确定奥陶系与志留系的界线位置提出了具体意见。为西藏乃至全国的志留系的研究与划分提供了重要依据。 相似文献
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江西省湖口—彭泽地区第四系研究新进展 总被引:1,自引:0,他引:1
通过1∶5万湖口县幅区域地质调查,应用地层学和沉积学新理论、新方法,对湖口—彭泽陆相盆地进行了第四系岩层划分、沉积相研究,取得了一些新的进展:首次应用基本层序特征及岩性组合进行了组级地层划分;依据基本层序特征、岩石地层分布形态及沉积构造,恢复了沉积相;查明了各岩石地层单位之间的接触关系,为该区第四系研究工作提供了新的依据 相似文献
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本文以基本层序,标志层在赣西北古生以及三叠纪地层应用为例,阐述了这两种方法各自功能以及相互渗透、相互结合的作用。 相似文献
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当前我国第四纪地层研究中存在的不规范和地层混乱现象,主要表现是:长期忽视第四纪岩石地层单位的建立和研究,将岩石地层单位与年代地层单位混用,过分强调多重地层单位界线的一致性等等。当前的第四纪(系)划分方案存在不妥之处,建议:1)将第四纪(系)四分; 2)尽快制定《中国第四系地层规范》,以适应即将开始的新一轮国土资源大调查的需要。 相似文献
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YAO Jianxin BO Jingfang HOU Hongfei WANG Zejiu MA Xiulan LIU Fengshan HU Guangxiao JI Zhansheng WU Guichun WU Zhenjie LI Suping GUO Caiqing LI Ya 《《地质学报》英文版》2016,90(4):1069-1081
Scientific research and productive practice for earth history are inseparable from the accurate stratigraphic framework and time framework. Establishing the globally unified, precise and reliable chronostratigraphic series and geological time series is the major goal of the International Commission on Stratigraphy(ICS). Under the leadership of the ICS, the countries around the world have carried out research on the Global Standard Stratotype-section and Points(GSSPs) for the boundaries of chronostratigraphic systems. In the current International Chronostratigraphic Chart(ICC), 65 GSSPs have been erected in the Phanerozoic Eonothem, and one has yet been erected in the Precambrian Eonothem. Based on the progress of research on stratigraphy especially that from its subcommissions, the ICS is constantly revising the ICC, and will publish a new International Stratigraphic Guide in 2020. After continual efforts and broad international cooperation of Chinese stratigraphers, 10 GSSPs within the Phanerozoic Eonothem have been approved and ratified to erect in China by the ICS and IUGS. To establish the standards for stratigraphic division and correlation of China, with the support from the Ministry of Science and Technology, the National Natural Science Foundation of China and the China Geological Survey, Chinese stratigraphers have carried out research on the establishment of Stages in China. A total of 102 stages have been defined in the "Regional Chronostratigraphic Chart of China(geologic time)", in which 59 stages were studied in depth. In 2014, the "Stratigraphic Chart of China" was compiled, with the essential contents as follows: the correlation between international chronostratigraphy and regional chronostratigraphy of China(geologic time), the distributive status of lithostratigraphy, the characteristics of geological ages, the biostratigraphic sequence, the magnetostratigraphy, the geological events and eustatic sea-level change during every geological stage. The "Stratigraphical Guide of China and its Explanation(2014)" was also published. Chinese stratigraphers have paid much attention to stratigraphic research in south China, northeast China, north China and northwest China and they have made great achievements in special research on stratigraphy, based on the 1:1000000, 1:250000, 1:200000 and 1:50000 regional geological survey projects. Manifold new stratigraphic units were discovered and established by the regional geological surveys, which are helpful to improve the regional chronostratigraphic series of China. On the strength of the investigation in coastal and offshore areas, the status of marine strata in China has been expounded. According to the developing situation of international stratigraphy and the characteristics of Chinese stratigraphic work, the contrast relation between regional stratigraphic units of China and GSSPs will be established in the future, which will improve the application value of GSSPs and the standard of regional stratigraphic division and correlation. In addition, the study of stratigraphy of the Precambrian, terrestrial basins and orogenic belts will be strengthened, the Stratigraphic Chart of China will be improved, the typical stratigraphic sections in China will be protected and the applied study of stratigraphy in the fields of oil and gas, solid minerals, etc. will be promoted. On the ground of these actions, stratigraphic research will continue to play a great role in the social and economic development of China. 相似文献
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根据1:5万区域地质调查有关规范和技术要求,在西藏埃永错东地区开展了1:5万区域地质调查。通过对岩石地层、年代地层、生物地层、层序地层和事件地层等多重地层的划分与对比,重新厘定了古生代、中生代地层形成的时代和地层序列,并将特殊岩性层以非正式填图单位进行了表达; 系统查明了区域地层、岩石、构造特征和成矿地质条件; 首次在晚三叠世日干配错群中新识别出晚侏罗世-早白垩世雪山组; 建立了测区二叠系多重地层划分方案; 重新厘定了日干配错群基本层序和物质组成,将日干配错群进一步划分为2个组; 新解体出31个侵入体、8个潜火山岩地质体和多条中酸性脉体; 查明了区内断裂、褶皱等构造性质、时代、序次及空间配置关系,建立了测区构造格架和构造样式; 新发现金属矿(化)点18处,找矿靶区2处。 相似文献
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层序地层学研究在国内的进展 总被引:1,自引:0,他引:1
层序地层学被引入我国10年来,地质工作者结合我国的具体地质情况,运用层序地层学的理论对古生代海相沉积盆地碳酸盐岩地层进行了研究,探讨了沉积体系域的控矿作用。在一些大比例尺沉积岩区区调工作中,开展了露头层序地质学的研究。在陆相盆地工作中,发现影响陆相地层层序的因素很多,随机性更强。针对这种情况,提出了利用露头、地震和钻井资料综合进行层序地层学的研究,指导油气勘探。此外,利用层序地层学理论,在岩相古地理研究方面也取得了可喜的成果。 相似文献
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以西南岩溶区特殊的资源和环境特点为导向,利用多源、多时相、多尺度遥感数据,采用遥感信息计算机自动提取和人机交互解译相结合的技术方法,将遥感技术系统应用于岩溶区1:50000区域地质调查工作中,提供系列的基础图件辅助岩溶区区域地质填图,提高了岩溶区1:50000区域地质调查的效率。初步建立了适合西南岩溶区的1:50000区域地质调查遥感技术方法体系,快速准确地解译出了岩溶区特殊的地质、地貌、环境、水文等要素,为特殊地质地貌区地质填图提供技术支持。 相似文献
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