| 异整合面——古环境剧变的地层记录 |
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| 引用本文： | 高远,Alan R.Carroll,王成善.异整合面——古环境剧变的地层记录[J].沉积学报,2021,39(1):46-57. |
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| 作者姓名： | 高远 Alan R.Carroll 王成善 |
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| 作者单位： | 1.生物地质与环境地质国家重点实验室，中国地质大学（北京）地球科学与资源学院，北京 ;100083 |
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| 基金项目： | 教育部基本科研业务费项目;国家自然科学基金项目;"111计划"项目 |
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| 摘 要： | 异整合面是在区域（盆地尺度）或全球范围内发生根本性的、突然的、持续性的沉积相变而形成的地层界面。有别于传统的沉积学和地层学概念以沉积环境保持稳定或者缓慢连续变化为前提，异整合面强调古环境剧变事件在地层中的记录，它是不遵循瓦尔特相律的地层界面。陆相环境波动频繁、变化剧烈，容易发育异整合面，例如北美古近系绿河组、松辽盆地白垩系、准噶尔盆地二叠系中的异整合面。海相地层异整合面的成因是全球性的气候剧变事件，例如古新世—始新世界线、白垩纪—古近纪界线、奥陶纪—志留纪界线、成冰纪—埃迪卡拉纪界线发育的异整合面。异整合面的识别和研究有助于深入理解地质历史中气候环境变化的临界点和转折期及其在沉积体系中的响应。古环境剧变往往直接影响有机质的埋藏和富集，是非常规油气沉积学研究的重要内容之一，因此异整合面的识别和研究对于全球油气资源勘探也具有重要指导意义。
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| 关 键 词： | 异整合面 古环境 古气候 沉积学 地层学 |
| 收稿时间： | 2020-07-06 |
Xenocomformity: A stratigraphic surface representing fundamental and abrupt paleoenvironmental change |
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| GAO Yuan,CARROLL Alan R.,WANG ChengShan.Xenocomformity: A stratigraphic surface representing fundamental and abrupt paleoenvironmental change[J].Acta Sedimentologica Sinica,2021,39(1):46-57. |
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| Authors: | GAO Yuan CARROLL Alan R WANG ChengShan |
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| Institution: | 1.State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China2.Department of Geoscience, University of Wisconsin?Madison, Madison, Wisconsin 53706, USA |
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| Abstract: | A xenoconformity is a stratigraphic surface or gradational interval that records a fundamental,abrupt,and persistent change in sedimentary facies across basinal to global scales.Different from traditional concepts of stratigraphic surfaces which are on the premise that the depositional environments either have not changed appreciably through time,or else have changed very slowly,xenoconformities emphasize relatively rapid,comprehensive paleoenvironmental changes,and therefore do not follow the classic“Walther’s law”.Continental environments are of great varieties and of high-amplitude changes,and favor the formation of xenoconformities.Examples of continental xenoconformities include those in Paleogene Greenriver Formation,in Cretaceous Songliao Basin and in Permian Junggar Basin.Marine xenoconformities represent paleoclimatic and paleoenvironmental events at global scale,including those at Paleocene-Eocene boundary,at Cretaceous-Paleogene boundary and at Cryogenian-Ediacaran boundary.We expect researches on xenoconformities could be of help on interpreting major paleoenvironmental tipping points and their responses in stratigraphic records.Furthermore,as paleoenvironmental changes control processes of organic matter burial,researches on xenoconformities could also help petroleum exploration. |
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| Keywords: | xenoconformity paleoenvironment paleoclimate sedimentary geology stratigraphy |
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