文献类型：期刊文献

中文题名：鄂尔多斯盆地南部含油砂层孢粉组合时代及古气候记录

英文题名：Palynomorph Assemblages and Paleoclimate Records from the Oil-sands Bearing Layers in the Southern Ordos Basin

作者：曹瀚升[1];陈法锦[1];黄鑫[1];蒲晓强[1]

机构：[1]广东海洋大学海洋与气象学院/广东省近海海洋变化与灾害预警重点实验室,广东湛江524088

年份：2018

卷号：38

期号：6

起止页码：55

中文期刊名：广东海洋大学学报

外文期刊名：Journal of Guangdong Ocean University

收录：CSTPCD

基金：广东海洋大学博士启动基金(R17069);广东海洋大学创新强校项目(GDOU2014050201);广东海洋大学创新强校项目(GDOU2016050241)

语种：中文

中文关键词：孢粉特征;油砂;延安组;古气候

外文关键词：palynomorph assemblage;oil sands;Yanan Formation;paleoclimate

中文摘要：【目的】研究鄂尔多斯盆地南部油砂的时代归属及古气候特征。【方法】基于油砂上下层段的孢粉化石的研究,追溯了孢粉组合的时代,并通过古植被分布特征恢复古气候。【结果】本组合中以裸子植物花粉占绝对优势,其中以古松柏类Paleoconiferae和松科Protopinus、Pseudopicea、Piceites、Pseudopinus为主,蕨类植物孢子较少。同时我们识别出多个具有时代特征的孢粉类型。【结论】推测油砂富集层位可能为下侏罗统延安组。依据孢粉谱和孢粉类群的古生态特征,认为在下侏罗统延安组沉积时期,气候温暖潮湿,大量存在常绿针叶林植被及少量草本和灌木,整体属于温带—亚热带气候。

外文摘要：【Objective】To study the age of the oil sands discovered in the southern Ordos Basin and the paleoclimatic conditions.【Method】Based on the investigations of the palynomorphs, the ear of the sporopollen assemblage was traced, and the paleoclimate was reconstructed through the distribution of paleovegetation.【Result】The pollen was primarily from gymnosperms. It was dominated especially by Paleoconiferae and Pinacea, which were mainly Protopinus, Pseudopicea, Piceites, and Pseudopinus. Pteridophyte was less common and we identified many epoch-specific sporopollen.【Conclusion】Judged from the epoch characteristics of sporopollen assemblage, oil-sands bearing layers may belong to the Lower Jurassic Yanan Formation. Based on palynological spectra and the paleoecological characteristics of palynological taxa, we speculate that the climate was warm and humid during the deposition of the Yanan Formation. Palynological vegetation types are always dominated by coniferous forest vegetation and a small number of herbs. The overall climate belongs to temperate and subtropical climate.