Comptes Rendus Geoscience最新文献_第7页

Une lettre de Humboldt à Thénard (1805) 洪堡写给thenard的信(1805年)

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-10-01 DOI: 10.1016/j.crte.2019.10.005

Jean-Paul Poirier

引用次数: 0

Editorial board ENG 编辑委员会

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-10-01 DOI: 10.1016/S1631-0713(19)30124-5

引用次数: 0

Comparison of hydrological models for use in climate change studies: A test on 241 catchments in West and Central Africa 气候变化研究中水文模型的比较:对西非和中非241个集水区的测试

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-10-01 DOI: 10.1016/j.crte.2019.08.001

Kiswendsida Samiratou Ouermi , Jean-Emmanuel Paturel , Julien Adounpke , Agnidé Emmanuel Lawin , Bi Tié Albert Goula , Ernest Amoussou

引用次数: 6

The Cretaceous marine onlap on Palaeozoic deposits (Smara–Lâayoune Basin, South Morocco). Comparison with neighbouring regions 摩洛哥南部ssmara - layoune盆地白垩纪海相对古生代沉积的覆盖。与邻近地区比较

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-10-01 DOI: 10.1016/j.crte.2019.09.003

Mohamed Abioui , Serge Ferry , Danièle Grosheny , Nourrissaid Içame , Emmanuel Robert , Mohammed Benssaou

{"title":"The Cretaceous marine onlap on Palaeozoic deposits (Smara–Lâayoune Basin, South Morocco). Comparison with neighbouring regions","authors":"Mohamed Abioui , Serge Ferry , Danièle Grosheny , Nourrissaid Içame , Emmanuel Robert , Mohammed Benssaou","doi":"10.1016/j.crte.2019.09.003","DOIUrl":"10.1016/j.crte.2019.09.003","url":null,"abstract":"<div><p>The Cretaceous marine transgression proceeded through successive steps from the Albian to the Turonian (dated with ammonites). The onlapping wedge begins with coastal transgressive–regressive short-term sequences on massive, probably fluvial sandstones to be correlated with the very thick continental Lower Cretaceous succession found in the Puerto Cansado well in the Tarfaya sub-basin to the north. A second step, of probable Cenomanian age, reached the Palaeozoic basement. A third, more pronounced step occurred during the earliest Turonian with platy laminated limestone overlain by marlstone bearing pyritized ammonites. At early Turonian peak transgression, a marine connection was possibly established between the Atlantic and the Tethyan margins, between the Anti-Atlas and the Reguibat Shield. From large-scale correlation integrating what occurred along the southwestern shoulder of the Atlas rift, the South Moroccan Atlantic margin may have undergone a short-lived tectonic uplift around the Cenomanian–Turonian boundary.</p></div>","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crte.2019.09.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41938945","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: 5

Crustal structure beneath the Mount Cameroon region derived from recent gravity measurements 根据最近的重力测量得出的喀麦隆山地区的地壳结构

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-08-01 DOI: 10.1016/j.crte.2019.05.001

Severin Nguiya , Marcelin Mouzong Pemi , Alain Pierre Tokam , Évariste Ngatchou Heutchi , Willy Lemotio

{"title":"Crustal structure beneath the Mount Cameroon region derived from recent gravity measurements","authors":"Severin Nguiya , Marcelin Mouzong Pemi , Alain Pierre Tokam , Évariste Ngatchou Heutchi , Willy Lemotio","doi":"10.1016/j.crte.2019.05.001","DOIUrl":"10.1016/j.crte.2019.05.001","url":null,"abstract":"<div><p>In this study, the recent update of the gravity database with new measurements has raised the opportunity of improving the knowledge of the crustal structure beneath the large volcanic system called Mount Cameroon, and its implication in the regional tectonics. The multi-scale wavelet analysis method was applied to highlight the geologic features of the area, and their depths were estimated using the logarithmic power spectrum method. The results reveal a complex crustal structure beneath Mount Cameroon with high variation in the lateral distribution of crustal densities. The upper and lower crusts are intruded by dense materials originating from the mantle with less lateral extension. The trends of Tiko and Ekona faults along the intrusion suggest tectonic activities as deep as 25 km. The difference in mantle composition or temperature between the East and the West of the studied area is clearly seen in detailed wavelet images and agrees with a mantle origin for the Cameroon Volcanic Line.</p></div>","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crte.2019.05.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45271431","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: 5

Phosphatic series under Plio-Quaternary cover of Tadla Plain, Morocco: Gravity and seismic data 摩洛哥塔德拉平原上第四纪盖层下的磷系:重力和地震资料

IF 1.4 4区地球科学

Comptes Rendus Geoscience Pub Date : 2019-08-01 DOI: 10.1016/j.crte.2019.05.002

Nadia El Kiram , Mohammed Jaffal , Azzouz Kchikach , Driss El Azzab , Mustapha El Ghorfi , Oussama Khadiri , Es-Said Jourani , Ahmed Manar , Mohamed Nahim

{"title":"Phosphatic series under Plio-Quaternary cover of Tadla Plain, Morocco: Gravity and seismic data","authors":"Nadia El Kiram , Mohammed Jaffal , Azzouz Kchikach , Driss El Azzab , Mustapha El Ghorfi , Oussama Khadiri , Es-Said Jourani , Ahmed Manar , Mohamed Nahim","doi":"10.1016/j.crte.2019.05.002","DOIUrl":"10.1016/j.crte.2019.05.002","url":null,"abstract":"<div><p>The Ouled Abdoun sedimentary basin in Morocco contains the largest phosphate reserves in the world. To the Northwest of the basin, the phosphate layers crop out or are at a shallow depth and are exploited in open pit mines. By contrast, towards the central and southwestern parts of the basin, the phosphate layers lay below the Plio-Quaternary sediments of the Tadla Plain. This study aims to characterize the distribution and structure of the phosphatic series at depth under this cover, in particular to guide the future exploration and exploitation of the phosphate deposits. The work is based on gravimetric and seismic data acquired in a previous oil exploration study, calibrated by borehole data. The analysis of the gravity data controlled by boreholes first reveals the existence of large regional faults in the basin, forming pronounced gradients in the gravity data. The faults are also seen in the seismic profiles. In the Southeast of the basin, the phosphatic series exhibit a stairway structure controlled by some of these regional faults.</p><p>The drilling data and the isochron maps established from the seismic profiles show that the base of the phosphatic series is more than 500 m deep in the southeastern area of the basin. As the phosphatic layers get buried deeper, they also become thicker. The phosphate reserves thus increase towards the southeast, and our analysis identifies the areas where this reserve is larger. Our results eventually suggest that the mining methods currently adopted in the Khouribga mining district will need to be modified and adapted to the more complex situation of the phosphatic series deeply buried in the basin.</p></div>","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crte.2019.05.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47697264","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: 7

Page de Sommaire 目录页

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":null,"pages":null},"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