Geologica Belgica最新文献_第5页

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

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-12-15 DOI: 10.20341/gb.2019.009

J. Denayer

{"title":"Revised stratigraphy of the Eifelian (Middle Devonian) of southern Belgium: sequence stratigraphy, global events, reef development and basin structuration","authors":"J. Denayer","doi":"10.20341/gb.2019.009","DOIUrl":"https://doi.org/10.20341/gb.2019.009","url":null,"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","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"97 1","pages":"149-173"},"PeriodicalIF":1.8,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83596782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Evaluation of Belgian clays for manufacturing compressed earth blocks 比利时粘土用于制作压缩土块的评价

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-12-10 DOI: 10.20341/gb.2019.002

L. A. Mango-Itulamya, F. Collin, P. Pilate, Fabienne Courtejoie, N. Fagel

{"title":"Evaluation of Belgian clays for manufacturing compressed earth blocks","authors":"L. A. Mango-Itulamya, F. Collin, P. Pilate, Fabienne Courtejoie, N. Fagel","doi":"10.20341/gb.2019.002","DOIUrl":"https://doi.org/10.20341/gb.2019.002","url":null,"abstract":"1. Introduction Faced with the current environmental challenges about climate change and depletion of earth’s resources (UNEP/UNECE, 2016), the building sector needs to renovate its design practices and methods by taking into account economic, sanitary and comfort criteria. The development of materials that address these criteria and promotion of their use is put forward. Raw earth is one of these materials (Niroumand et al., 2017). Raw earth designates the earth used in construction unfired but simply dried. Earth construction techniques are very varied: adobe (the molded and sun dried brick), cob (construction made by stacking earth balls handmade), wattle and daub (the earth used in filling load-bearing structures, usually made of wood), rammed earth (earth compacted in a framework), and Compressed Earth Block (compacted earth, achieved using manual or mechanical presses) are the main ones (CRAterre et al. 1979; Houben & Guillaud, 1989). Raw earths can be used to produce compressed earth blocks (CEB) with ecological, thermal and economic advantages. However, the raw earth blocks have the disadvantage of deteriorating to humidity change or abrasion. This decreases its durability, i.e. resistance over time (Rigassi, 1995). Stabilization is a process to improve the impermeability (water resistance) and the hardness (impact and friction resistance, reduction of crumbling) of the earth block. There are more than a hundred products stabilizing the earth: sand, gravel, cement, l","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"117 1","pages":"139-148"},"PeriodicalIF":1.8,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79416345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Investigation of some Givetian rugose corals from the Mont d’Haurs Formation in southern Belgium 比利时南部Mont d 'Haurs组的若干吉田红珊瑚的调查

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-11-20 DOI: 10.20341/gb.2019.008

M. Coen-Aubert

引用次数: 0

Vertical and lateral distribution of Foraminifera and Ostracoda in the East Frisian Wadden Sea – developing a transfer function for relative sea-level change 东弗里斯兰瓦登海有孔虫和介形虫的垂直和横向分布——建立相对海平面变化的传递函数

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-10-31 DOI: 10.20341/gb.2019.007

Juliane Scheder, P. Frenzel, Friederike Bungenstock, M. Engel, H. Brückner, A. Pint

{"title":"Vertical and lateral distribution of Foraminifera and Ostracoda in the East Frisian Wadden Sea – developing a transfer function for relative sea-level change","authors":"Juliane Scheder, P. Frenzel, Friederike Bungenstock, M. Engel, H. Brückner, A. Pint","doi":"10.20341/gb.2019.007","DOIUrl":"https://doi.org/10.20341/gb.2019.007","url":null,"abstract":"In light of rising sea levels and increased storm surge hazards, detailed information on relative sea-level (RSL) histories and local controlling mechanisms is required to support future projections and to better prepare for future coastal-protection challenges. This study contributes to deciphering Holocene RSL changes at the German North Sea coast in high resolution by developing a transfer function for RSL change. Recent associations of Foraminifera and Ostracoda from low intertidal to supratidal settings of the barrier island of Spiekeroog in combination with environmental parameters (granulometry, C/N, TOC, salinity) were investigated and quantified in elevation steps of 15 cm in order to generate a first transfer function (TF) of Holocene RSL change. In a future step, the TF can be applied to the stratigraphic record. Our data show a clear vertical zonation of foraminifer and ostracod taxa between the middle salt marsh and the tidal flat with very few individuals in the sand flat area, suggesting removal by the tidal current or poor preservation. Multivariate statistics identify the elevation, i.e. the inundation frequency, as main driving factor. The smallest vertical error (49 cm) is associated with an entirely new approach of combining Foraminifera and Ostracoda for a TF. Advantages of the TF over classical RSL indicators such as basal and intercalated peat – beside the relatively narrow indicative meaning – include the possible application to a wide range of intertidal facies and that it does not depend on compaction-prone peat.","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"92 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84065299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Geological observations in the Five-Klippes area, northwestern Katanga Copperbelt (Democratic Republic of the Congo) 加丹加铜带西北部五克利普斯地区的地质观测(刚果民主共和国)

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-10-30 DOI: 10.20341/gb.2019.006

Maurice ILUNGA YANTAMBWE, J. Cailteux

{"title":"Geological observations in the Five-Klippes area, northwestern Katanga Copperbelt (Democratic Republic of the Congo)","authors":"Maurice ILUNGA YANTAMBWE, J. Cailteux","doi":"10.20341/gb.2019.006","DOIUrl":"https://doi.org/10.20341/gb.2019.006","url":null,"abstract":"Surface mapping and exploration in the search license PR-2348, northwest of Kolwezi in the Neoproterozoic Katanga Copperbelt, focussed in the poorly documented Five-Klippes area, and showed that the Roan megabreccias occurring at the ground surface in the klippes are composed mostly of Musonoï, Mines (Kamoto Formation) and Kiubo rocks that form km- to mm-size blocks, fragments and matrix. The megabreccias are bordered by rocks of the Kiubo Formation, that are gently dipping south on the northern side, with few approximatively 10 m-size sharp refolding close to the megabreccia, while they are vertically dipping north on the southern side. A 262 m-long exploration core drilling performed under the megabreccia of one of the klippes highlighted a faulting marked by hydraulic-like fractured-deformed Kiubo rocks and by friction breccias. The Kiubo blocks, fragments and matrix in the megabreccia were teared out most likely from the southern limb of the fault. The faulting in depth is interpreted here as the roots of the ground surface megabreccia. This rupture and shearing is questioning the autochthonous character of the surrounding Kiubo and Mongwe rocks. It is suggested that, similarly as for the eastern Mamfwe anticline, the Nguba and Kundelungu groups succession in the klippes area constituted blocks thrust during the fold-and-thrust event of the Katangan orogeny, and extruded the megabreccias of the klippes before suture during the final stage of the northward compression. A nearly north-south transversal faulting and shearing crosscutting the limbs and megabreccias of the klippes marked the end of the compression. These new observations complement other similar ones in that region, and have important implications for future Cu-Co exploration.","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2019-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87555740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

An annotated catalogue of types of Silurian–Devonian brachiopod species from southern Belgium and northern France in the Royal Belgian Institute of Natural Sciences (1870–1945), with notes on those curated in other Belgian and foreign institutions 比利时皇家自然科学研究所收藏的比利时南部和法国北部志留纪-泥盆纪腕足动物种类注释目录(1870-1945)，附有其他比利时和外国机构的注释

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-08-31 DOI: 10.20341/GB.2019.005

Bernard Mottequin

{"title":"An annotated catalogue of types of Silurian–Devonian brachiopod species from southern Belgium and northern France in the Royal Belgian Institute of Natural Sciences (1870–1945), with notes on those curated in other Belgian and foreign institutions","authors":"Bernard Mottequin","doi":"10.20341/GB.2019.005","DOIUrl":"https://doi.org/10.20341/GB.2019.005","url":null,"abstract":"The type material of 45 Pridolian–Devonian brachiopod species, described in southern Belgium and northern France (1870–1945) and curated at the Royal Belgian Institute of Natural Sciences (Brussels), is re-investigated and illustrated in order to facilitate future taxonomic revision; such a catalogue should allow a better assessment of the brachiopod diversity during the considered time span. Furthermore, 28 other Silurian–Devonian species originally described in Belgium (1850–1950), but housed in other Belgian or foreign institutions, are also discussed. For taxonomical purposes, the lectotypes of several species are selected; the latter were described by Asselberghs (Stropheodonta couviniensis, Plethorhyncha percostata var. gdoumontensis, Athyris dorlodoti, Retzia gdoumontensis, Dielasma maillieuxi), Béclard (Orthis dorsoplicata, Orthis musischura, Rhynchonella parvula (non R. parvula Eudes-Deslongchamps)), de Ryckholt (Lingula amayana), Dewalque (Crania corneti), and Maillieux (Discina (Discina) forrierensis, Pholidostrophia extensa, Anoplia theorassensis, Schuchertella durbutensis, Streptorhynchus rahiri, Pentamerus loei). Re-investigation of the ambocoeliid Spirifer pentameroides Stainier highlighted the homonymy between Diazoma Dürkoop, 1970 (Brachiopoda) and Diazoma Lamarck, 1816 (Tunicata); the former genus must be rejected and replaced by a valid synonym, namely Kelusia Mamedov, 1978.","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"70 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2019-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86326972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

New Paleocene bird fossils from the North Sea Basin in Belgium and France 在比利时和法国北海盆地发现的新古新世鸟类化石

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-04-19 DOI: 10.20341/GB.2019.003

G. Mayr, T. Smith

引用次数: 15

Early Middle Devonian trilobites and events in the Nismes – Vireux-Molhain area, southern border of the Dinant Synclinorium (Belgium, northern France) 中泥盆世早期尼姆斯-维勒克斯-莫尔海因地区的三叶虫及其事件，迪南向斜区南部边界(比利时，法国北部)

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-02-26 DOI: 10.20341/GB.2019.001

Allart P. VAN VIERSEN, Peter Taghon, Benedikt Magrean

{"title":"Early Middle Devonian trilobites and events in the Nismes – Vireux-Molhain area, southern border of the Dinant Synclinorium (Belgium, northern France)","authors":"Allart P. VAN VIERSEN, Peter Taghon, Benedikt Magrean","doi":"10.20341/GB.2019.001","DOIUrl":"https://doi.org/10.20341/GB.2019.001","url":null,"abstract":"Well-preserved trilobite specimens are recorded from Eifelian strata between the villages of Nismes (southern Belgium) and Vireux-Molhain (northern France). In the area of study the lower Eifelian Vieux Moulin Member of the Jemelle Formation crops out. The diversified trilobite associations of this unit occur in dark shales and siltstones during a deepening phase and replace the comparatively poorly diversified trilobite fauna of the underlying Eau Noire Formation. This overturn of the local trilobite fauna might, in part, be considered a regional expression of the globally recognised Choteč Event. A marked influx of exotic trilobites in the Vieux Moulin Member is provisionally referred to the local Vieux Moulin Event. Trilobite diversity peaked in the middle Eifelian part (Chavées Member) of the Jemelle Formation before drastically dropping in the upper part of this formation. The manifestations in the Ardennes of the eastern North American Bakoven and Stony Hollow Events can neither be confirmed nor rejected based on the currently available data. New taxa from the early Eifelian part of the Jemelle Formation in the area of study are Asteropyge boeckae sp. nov., Asteropyge eonia sp. nov., Asteropyge filoxenia sp. nov., Cyphaspis insolata sp. nov., Cyphaspis iuxta sp. nov., Diademaproetus pertinax sp. nov., Geesops icovellaunae sp. nov., Gerastos kesselaeri sp. nov., Kettneraspis eftychia sp. nov., Pedinopariops ceuthonymus sp. nov., Pedinopariops richterianus geminus ssp. nov., Scabriscutellum archinalae sp. nov., Septimopeltis akatastasia sp. nov. and Tropidocoryphe insciens sp. nov. Our material includes exceptionally rare, well-preserved specimens from the famous “Mur des douaniers” locality near Vireux-Molhain. Additionally, Astycoryphe rugocauda sp. nov. is described from the lower Eifelian Couvin Formation (southern Belgium) and Gerastos silvicultrix sp. nov. from the uppermost Emsian Heisdorf Formation (German Eifel).","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"52 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2019-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74163945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Cabindachanos dartevellei gen. and sp. nov., a new chanid fish (Ostariophysi, Gonorynchiformes) from the marine Paleocene of Cabinda (Central Africa) 中非卡宾达海洋古新世一种鱼新种(淋齿目鱼体科)

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2019-01-01 DOI: 10.20341/GB.2018.011

L. Taverne, T. De Putter, F. Mees, T. Smith

{"title":"Cabindachanos dartevellei gen. and sp. nov., a new chanid fish (Ostariophysi, Gonorynchiformes) from the marine Paleocene of Cabinda (Central Africa)","authors":"L. Taverne, T. De Putter, F. Mees, T. Smith","doi":"10.20341/GB.2018.011","DOIUrl":"https://doi.org/10.20341/GB.2018.011","url":null,"abstract":"The osteology of Cabindachanos dartevellei gen. and sp. nov., a fossil fish from the marine Danian or early Selandian deposits of Landana (Cabinda Territory, Central Africa), is here studied in detail. This fish is known by only one partially preserved specimen that shows typical characters. The opercle is greatly hypertrophied. The preopercle has a very broad dorsal limb and a long narrower ventral limb. There is a wide plate-like suprapreopercle. The lower jaw is deep, with a well-marked coronoid process formed by the dentary. The articulation between the quadrate and the mandible is located before the orbit. The first supraneurals are enlarged. These characters indicate that C. dartevellei belongs to the family Chanidae (Teleostei, Gonorynchiformes). Cabindachanos dartevellei differs from all the other known fossil or recent chanid fishes by the gigantic development of its opercle and by the loss of the subopercle. The straight angle formed by the two limbs of the preopercle and the well-developed posterior median crest of the supraoccipital indicate that C. dartevellei belongs to the subfamily Chaninae and the tribe Chanini.","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"16 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73846726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Bacterial origin of the red pigmentation of Phanerozoic carbonate rocks: an integrated study of geology-biology-chemistry (Ernest Van den Broeck medallist lecture 2017) 显生宙碳酸盐岩红色色素沉积的细菌起源:地质-生物-化学的综合研究(Ernest Van den Broeck 2017年奖章获得者讲座)

IF 1.8 4区地球科学

Geologica Belgica Pub Date : 2018-12-31 DOI: 10.20341/GB.2018.010

A. Préat, C. Ridder, D. Gillan

{"title":"Bacterial origin of the red pigmentation of Phanerozoic carbonate rocks: an integrated study of geology-biology-chemistry (Ernest Van den Broeck medallist lecture 2017)","authors":"A. Préat, C. Ridder, D. Gillan","doi":"10.20341/GB.2018.010","DOIUrl":"https://doi.org/10.20341/GB.2018.010","url":null,"abstract":"1. Introduction The conference presented by one of us (A.P.) in September 2017 in honor of the Van den Broeck medal is the result of recurrent questions asked by many geologists, especially Belgians, about the origin of the red color of the Frasnian ‘marbles’ of our Ardennes. These marbles have been known throughout the world for several centuries both for their use as decorative material and also for the geological interpretation of their depositional setting and, naturally, of their red color. They are also known at a world scale by Dupont’s description (in 1881) who reported particular cavities, the ‘stromatactis’, later defined by Bathurst (1982). Since then an infinite literature has been devoted to them and the term ‘stromatactis’, originally described in the Belgian Frasnian, is commonly used in the Precambrian and global Phanerozoic carbonates. Finally, following numerous questions on the origin of these marbles, they were considered as ‘reefs’ as soon as they were discovered, Boulvain (1990) definitively established the depositional environment of these mud mounds showing how these ‘reefs’ were built in relation to relative sea level variations. The red color was also discussed in his work, and attributed to iron-bacterial activity in dysaerobic media. This study was initiated at the Universite Libre de Bruxelles, at the initiative of Professors A. Herbosch and B. Mamet. It is with the latter that one of us (A.P.) decided to extend this theme to other ‘marbles’ and","PeriodicalId":12812,"journal":{"name":"Geologica Belgica","volume":"8 1","pages":"167-175"},"PeriodicalIF":1.8,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79038398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4