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IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-08-01 DOI: 10.1016/S1631-0713(19)30111-7

引用次数: 0

Groundwater recharge study based on hydrological data and hydrological modelling in a South American volcanic aquifer 基于水文数据和水文模拟的南美火山含水层地下水补给研究

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-08-01 DOI: 10.1016/j.crte.2019.06.001

Maurício D. Melati , Fernando M. Fan , Gustavo B. Athayde

{"title":"Groundwater recharge study based on hydrological data and hydrological modelling in a South American volcanic aquifer","authors":"Maurício D. Melati , Fernando M. Fan , Gustavo B. Athayde","doi":"10.1016/j.crte.2019.06.001","DOIUrl":"10.1016/j.crte.2019.06.001","url":null,"abstract":"<div><p>In humid subtropical regions, baseflow is mainly governed by aquifer discharges and this dynamic is fed by groundwater recharge. To better comprehend the watershed groundwater recharge using a large-scale approach, two watersheds located over the Serra Geral Aquifer System (Southern South America) were studied. Three different groundwater recharge methods were utilized to study the baseflow: a simplified water budget, a hydrograph separation using the Eckhardt filter with different ways of obtaining the BFI<sub>max</sub> parameter, and the MGB–IPH hydrological model, which is unprecedented in being used for this purpose. These methods showed a general mutual convergence, where recharge magnitude remained similar in most methods. The MGB–IPH model proved to be a useful tool for understanding the occurrence of groundwater recharge. Uncertainties associated with the representativity of interflow demonstrated by hydrograph separation and shown in the model may indicate that the groundwater recharge estimate could be lower than those obtained considering hydrograph numerical filters.</p></div>","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":"351 6","pages":"Pages 441-450"},"PeriodicalIF":1.4,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crte.2019.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45110106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Geophysical methods for mapping Quaternary sediment thickness: Application to the Saint-Lary basin (French Pyrenees) 第四纪沉积物厚度测绘的地球物理方法:在圣拉里盆地(法国比利牛斯山脉)的应用

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-08-01 DOI: 10.1016/j.crte.2019.07.001

Pierre Bottelin , Grégory Dufréchou , Lucia Seoane , Muriel Llubes , Bernard Monod

引用次数: 4

Editorial board ENG 编辑委员会

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-08-01 DOI: 10.1016/S1631-0713(19)30108-7

引用次数: 0

Holocene palaeogeographical reconstruction and relative sea-level changes in the southeastern part of the island of Samos (Greece) 希腊萨摩斯岛东南部全新世古地理重建与相对海平面变化

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-08-01 DOI: 10.1016/j.crte.2019.09.001

Niki Evelpidou , Kosmas Pavlopoulos , Konstantinos Vouvalidis , George Syrides , Maria Triantaphyllou , Anna Karkani , Theodoros Paraschou

引用次数: 9

Tectono-metamorphic evolution of the European continental margin involved in the Alpine subduction: New insights from Alpine Corsica, France 参与阿尔卑斯俯冲的欧洲大陆边缘构造变质演化:来自法国阿尔卑斯科西嘉的新见解

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-06-01 DOI: 10.1016/j.crte.2018.12.002

Maria Di Rosa , Chiara Frassi , Francesca Meneghini , Michele Marroni , Luca Pandolfi , Alberto De Giorgi

{"title":"Tectono-metamorphic evolution of the European continental margin involved in the Alpine subduction: New insights from Alpine Corsica, France","authors":"Maria Di Rosa , Chiara Frassi , Francesca Meneghini , Michele Marroni , Luca Pandolfi , Alberto De Giorgi","doi":"10.1016/j.crte.2018.12.002","DOIUrl":"10.1016/j.crte.2018.12.002","url":null,"abstract":"<div><p>In Corsica, continental units (the Lower Units) affected by high-pressure metamorphism represent the remains of the European margin deformed during the Alpine orogeny. In order to document how Alpine deformation and metamorphism changed along the European margin involved in the Alpine subduction, we selected three key areas: the Corte, Cima Pedani, and Ghisoni transects. The three transects show a broadly similar lithostratigraphy. They are characterized by a Variscan basement intruded by Permo-Carboniferous metagranitoids, and by a sedimentary cover including Mesozoic carbonates and middle to late Eocene breccias and sandstones. The three transects recorded a similar deformation history with three deformation phases. Thermo-baric estimations, instead, reveal that each unit was exhumed along an independent retrograde path within the orogenic Alpine wedge. In particular, the lowest units of the Lower Units stack were exhumed along an isothermal path, whereas those located at upper structural levels experienced progressive heating.</p></div>","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":"351 5","pages":"Pages 384-394"},"PeriodicalIF":1.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crte.2018.12.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48601252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Editorial board ENG 编辑委员会ENG

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-06-01 DOI: 10.1016/S1631-0713(19)30083-5

引用次数: 0

Structural evolution of the Téfidet trough (East Aïr, Niger) in relation with the West African Cretaceous and Paleogene rifting and compression episodes 尼日尔tsamfidet海槽(东Aïr)与西非白垩纪和古近纪裂陷和挤压期的构造演化

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-06-01 DOI: 10.1016/j.crte.2018.11.009

Moussa Konaté, Yacouba Ahmed, Moussa Harouna

{"title":"Structural evolution of the Téfidet trough (East Aïr, Niger) in relation with the West African Cretaceous and Paleogene rifting and compression episodes","authors":"Moussa Konaté, Yacouba Ahmed, Moussa Harouna","doi":"10.1016/j.crte.2018.11.009","DOIUrl":"10.1016/j.crte.2018.11.009","url":null,"abstract":"<div><p>Located in northern Niger, the NW–SE Téfidet trough is the western branch of the Ténéré rift megasystem.</p><p>Here we present a tectono-sedimentary analysis of the Téfidet trough, based on the combined use of satellite imagery, field observations and measures, and available literature. We use these data to analyse the sedimentary facies and the tectonic deformations (faults, folds, basins) in the Téfidet trough, and derive their relative chronology. Doing so, we characterize synrift and postrift deformations and their interactions with sedimentation.</p><p>Altogether our analyses suggest that the Téfidet trough was affected from the Cretaceous to the Paleogene by three major tectonic periods.</p><ul><li><span>•</span><span><p>The first period was a rifting stage with extension and transtension during the Albian–Aptian times. The mean extension was ∼N60° and dominantly produced NW–SE-trending normal faults, a few strike-slip faults locally associated with small folds with sigmoidal axis and small reverse faults, and progressive unconformities.</p></span></li><li><span>•</span><span><p>the second period was also a rifting time, which prevailed during the Upper Cretaceous. The regime was marked by transtensional to extensional tectonics, under a ∼N130° shortening and a ∼N60° trending stretching. The end of this period saw the closure of the Téfidet trough.</p></span></li><li><span>•</span><span><p>the third period was a postrift stage. It was characterized by a ∼N70° extensional to transtensional regime during the Oligocene–Pliocene. It mainly produced post-sedimentary extensional faults and fractures and alkaline volcanism. We eventually discuss these deformation phases in relation with the Cretaceous Gondwana breakup and its related rifting events in West and North Africa, and with the subsequent Africa–Europe collision.</p></span></li></ul></div>","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":"351 5","pages":"Pages 355-365"},"PeriodicalIF":1.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crte.2018.11.009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41983199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Morphometric analysis of the drainage network of Samos Island (northern Aegean Sea): Insights into tectonic control and flood hazards 爱琴海北部萨摩斯岛水系的形态计量学分析:构造控制和洪水灾害的启示

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-06-01 DOI: 10.1016/j.crte.2019.03.001

Nikos Charizopoulos , Panagiotis Mourtzios , Thomas Psilovikos , Aris Psilovikos , Lina Karamoutsou

引用次数: 18

Variscan stress regime rotation: Insights from the analysis of kink folds in the northern margin of the Bohemian Massif, South Poland 华力西应力状态旋转：对波兰南部波希米亚地块北缘扭结褶皱的分析

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-06-01 DOI: 10.1016/j.crte.2019.04.003

Jerzy Żaba, Krzysztof Gaidzik

{"title":"Variscan stress regime rotation: Insights from the analysis of kink folds in the northern margin of the Bohemian Massif, South Poland","authors":"Jerzy Żaba, Krzysztof Gaidzik","doi":"10.1016/j.crte.2019.04.003","DOIUrl":"10.1016/j.crte.2019.04.003","url":null,"abstract":"<div><p>We aimed to determine variations in stress regimes during the youngest Variscan deformations in the northern part of the Bohemian Massif. For this purpose, we calculated the orientation of the principal stress and strain axes for kink folds observed in the metamorphic envelope of the Karkonosze Granite, using two methods: 1) the traditional method, incorporating structural diagrams (for conjugate kink folds only), and 2) butterfly diagram analysis. The use of both methods enabled us to determine the stress regime, based not only on conjugate but also on monoclinal kink bands. The obtained results prove that butterfly diagram analysis, when applied to monoclinal kink folds, yields reliable results, especially when calibrated using the internal friction angle (Ф) calculated for the conjugate structures.</p><p>We identified two generations of kink folds: 1) an older one, developed under sublatitudinal shortening and most probably related to the Early Carboniferous terminal stages of the northwest-directed thrusting of the metamorphic units, and 2) a younger one; produced by north-south Variscan Carboniferous compression, and the emplacement and subsequent doming of the Karkonosze Granite. This is the first study on brittle-ductile structures observed commonly in the metamorphic units of the Bohemian Massif, showing their relation to the granitoid intrusion and complementing the tectonic models that usually omit kink folds.</p></div>","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":"351 5","pages":"Pages 395-405"},"PeriodicalIF":1.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crte.2019.04.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44897854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2