| 华北地台早古生代竹叶状灰岩岩石特征及成因研究进展 |
| |
| 引用本文： | 余宽宏,畅通,邱隆伟,孙沛沛.华北地台早古生代竹叶状灰岩岩石特征及成因研究进展[J].沉积学报,2015,33(6):1111-1125. |
| |
| 作者姓名： | 余宽宏 畅通 邱隆伟 孙沛沛 |
| |
| 作者单位： | 中国石油大学(华东)地球科学与技术学院 山东青岛 266580 |
| |
| 基金项目： | 山东省自然科学基金青年基金，中国石油大学(华东)科研启动基金 |
| |
| 摘 要： | 砾屑灰岩在华北地台寒武系-奥陶系广泛发育,竹叶状灰岩只是其中一种,且所指范围界限模糊,常与其他类型的砾屑灰岩伴生在一起。古代陆表海提供了砾屑灰岩广泛发育的环境基础。潮坪和潮下开阔海是陆表海广泛发育的基本地貌单元,也是砾屑灰岩形成的重要场所。古板块运动表明,寒武纪华北地台处于低纬度地区,符合古风暴频发的要求。风暴及潮汐流是砾屑灰岩形成的主要动力。另外,成岩过程中的压实和固结脱水也是板条状砾屑的重要成因。条带状薄层灰泥石灰岩与泥岩及泥质灰岩的频繁互层是发生破碎并形成砾屑的物质基础。华北地台砾屑灰岩具有多种成因,可以按照砾屑的颜色特征、形态及磨圆程度、砾屑灰岩的支撑结构、充填物的类型等进行区分并进行成因分析。
|
| 关 键 词： | 华北地台 陆表海 潮坪 竹叶状灰岩 砾屑灰岩 |
| 收稿时间： | 2014-12-29 |
Research Development of Flat-pebble Conglomerate Characteristics and Their Origin in Early Paleozoic North China Platform |
| |
| Institution: | School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580 |
| |
| Abstract: | Limestone conglomerates are widely distributed in Cambrian-Ordovician North China Platform, and only a portion of limestone conglomerates have shape of bamboo leaf viewing from cross section. These limestone conglomerates were mixed with other pebbles. Ancient continental sea was environmental foundation for limestone conglomerates formed. Tidal flat and open marine platform were basic geomorphic units in continental sea, and the main place for limestone conglomerates formed. The ancient plate-motion indicated that North China plate situated in low latitude and has frequent storm wave and hurricane tide, which was the main power for limestone layers broken. In addition, compaction and dewatering also provided power for limestone layers broken. Limestone layers interbedded with mudstone layers or argillaceous limestone was material base for limestone becoming bamboo leaf shaped conglomerates. Limestone conglomerates in North China Platform can be classified and genetically interpreted in terms of color, shapes, the degree of grinding, support structure of limestone conglomerates, filling types. In short, limestone conglomerates in Cambrian-Ordovician North China Platform has many genesis and should be make a difference between various kinds of limestone conglomerates. |
| |
| Keywords: | North China Platform continental sea tidal flat bamboo leaf shaped limestone conglomerates limestone conglomerates |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《沉积学报》浏览原始摘要信息 |
| 点击此处可从《沉积学报》下载免费的PDF全文 |
|
