Revised stratigraphy of the Eifelian (Middle Devonian) of southern Belgium: sequence stratigraphy, global events, reef development and basin structuration

IF 1.2 4区 地球科学 Q2 GEOLOGY
J. Denayer
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引用次数: 8

Abstract

1. Introduction and historical background As properly summarized by Bultynck (2006), the ‘systeme calcaire de Couvin’ was introduced by Gosselet (1860) and included in a broad sense, the lower Middle Devonian limestone and related shale in southern Belgium. The term ‘Couvinien’ was introduced by Dupont (1885) to designate the fossiliferous strata below the Givetian limestone. The Couvinian limestone and shale unit was mapped under the sign ‘Cobm’ and ‘Cobn’ respectively on the geological map of Belgium at 1/40 000 (Maillieux, 1912). Maillieux & Demanet (1929) also introduced a litho-biostratigraphic scale for the Couvinian in which the ‘Calcaire de Couvin’ was designated by the sign ‘Co2a-b’ and the overlying shale units by the sign’Co2c’ and ‘Co2d’. The term Couvin Formation (Fm) was introduced by Bultynck et al. (1991) to replace the formerly used ‘Calcaire de Couvin’. The limited extension of the ‘Calcaire de Couvin’ and its thinning and disappearance eastwards are known since Dewalque (1861) and Gosselet (1860, 1888). However, most subsequent works have eluded this question and focused either on the Couvin area where the stratotype is exposed (Tsien, 1969; Bultynck, 1970), or on the Jemelle area where the limestone unit is entirely replaced by the fine-grained siliciclastics of the Jemelle Fm (Godefroid, 1968). Between these areas, the Eifelian succession is affected by strong and rapid lateral variations making the correlation scheme difficult to establish. The recent re
比利时南部Eifelian(中泥盆世)修订地层学:层序地层学、全球事件、礁发育和盆地构造
1. 正如Bultynck(2006)所总结的那样,“calcaire de Couvin系统”是由Gosselet(1860)引入的,从广义上讲,它包括比利时南部中泥盆世下部的石灰岩和相关的页岩。“Couvinien”一词是由杜邦(1885年)引入的,用来指在Givetian石灰岩下面的化石地层。在比利时1/ 40000地质图(Maillieux, 1912)上,古芬纪石灰岩和页岩单元分别以“Cobm”和“Cobn”标记。Maillieux & Demanet(1929)还引入了柯芬纪的岩石-生物地层尺度,其中“Calcaire de Couvin”用符号“Co2a-b”表示,其上的页岩单元用符号“co2c”和“Co2d”表示。术语Couvin Formation (Fm)是由Bultynck et al.(1991)引入的,以取代以前使用的Calcaire de Couvin。自Dewalque(1861)和Gosselet(1860, 1888)以来,人们就知道了“Calcaire de Couvin”的有限延伸及其向东变薄和消失。然而,大多数后续研究都回避了这个问题,并将重点放在层型暴露的Couvin地区(Tsien, 1969;Bultynck, 1970),或者在Jemelle地区,石灰岩单元完全被Jemelle Fm的细粒硅塑料所取代(Godefroid, 1968)。在这些地区之间,埃菲勒演替受到强烈而快速的横向变化的影响,使得相关方案难以建立。最近的一次
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来源期刊
Geologica Belgica
Geologica Belgica 地学-地质学
CiteScore
4.70
自引率
27.80%
发文量
8
审稿时长
>12 weeks
期刊介绍: Geologica Belgica is a Belgian journal that welcomes papers concerning all aspects of the earth sciences, with a particular emphasis on the regional geology of Belgium, North West Europe and central Africa. Papers not dedicated to the geology of Belgium, North West Europe and central Africa are only accepted when one of the authors is linked to a Belgian University or Institution. Thematic issues are highly appreciated. In this case, guest editors take in charge the selection of the manuscripts and the subject of the papers can be enlarged. The journal is in open access. Submitted manuscripts should be concise, presenting material not previously published. The journal also encourages the publication of papers from Belgian junior authors. Short letters are accepted. Papers written in English are preferred. Each mansucript will be reviewed by at least two reviewers.
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