Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science最新文献

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Différence entre vitesses hydrauliques et vitesses radiométriques des eaux d'un réservoir profond : proposition d'explication pour l'aquifère miocène du bassin de Valréas (Sud-Est de la France) 深水库水的水力速度和辐射速度的差异:valreas盆地中新世含水层的解释建议(法国东南部)
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-08-15 DOI: 10.1016/S1251-8050(01)01605-6
Frédéric Huneau, Bernard Blavoux, Yves Bellion
{"title":"Différence entre vitesses hydrauliques et vitesses radiométriques des eaux d'un réservoir profond : proposition d'explication pour l'aquifère miocène du bassin de Valréas (Sud-Est de la France)","authors":"Frédéric Huneau,&nbsp;Bernard Blavoux,&nbsp;Yves Bellion","doi":"10.1016/S1251-8050(01)01605-6","DOIUrl":"10.1016/S1251-8050(01)01605-6","url":null,"abstract":"<div><p>Isotopic measurements on groundwaters have been carried out on the Valréas Miocene aquifer. A strong isotopic contrast exists between the recharge area and the confined aquifer, suggesting limited hydraulic communications between these two portions. In the confined aquifer, radiometric velocities are 10 to 12 times smaller (0.2–0.4 m·yr<sup>−1</sup>) than hydraulic velocities (≈2.2 m·yr<sup>−1</sup>). The overexploitation of the resource can have entailed a major change in the hydraulic gradients leading to a perturbation of the system and a gradual attenuation of the hydraulic barrier, which may threaten the sustainability and the quality of the resource.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 3","pages":"Pages 163-170"},"PeriodicalIF":0.0,"publicationDate":"2001-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01605-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73343425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
L'effondrement de la plate-forme du Saint-Laurent : ouverture de Iapetus ou de l'Atlantique ? Apport de la reconstitution des paléocontraintes dans la région de Québec (Canada) 圣劳伦斯大陆架的倒塌:土卫二还是大西洋的开放?魁北克地区古应力重建的贡献(加拿大)
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-08-15 DOI: 10.1016/S1251-8050(01)01610-X
Muriel Rocher, Alain Tremblay
{"title":"L'effondrement de la plate-forme du Saint-Laurent : ouverture de Iapetus ou de l'Atlantique ? Apport de la reconstitution des paléocontraintes dans la région de Québec (Canada)","authors":"Muriel Rocher,&nbsp;Alain Tremblay","doi":"10.1016/S1251-8050(01)01610-X","DOIUrl":"10.1016/S1251-8050(01)01610-X","url":null,"abstract":"<div><p>The Saint-Lawrence Lowlands correspond to the Cambrian–Early Ordovician passive margin of the Iapetus Ocean, overlain by Ordovician deposits of the Appalachian foreland. A structural and palaeostress study of this platform near Quebec City allowed reconstructing its tectonic evolution since the Palaeozoic. The collapse of the Iapetus margin (NW–SE extension) has induced N040 normal faults. Appalachian compressions (WNW and north–south) have reactivated these border faults, and induced strike-slip faults trending N090 and N140. During the Mesozoic, NNE to NNW extensions have reactivated N090 and N040 faults. The following NE–SW compression has been active until today.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 3","pages":"Pages 171-178"},"PeriodicalIF":0.0,"publicationDate":"2001-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01610-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83285406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Découverte de deux nouvelles espèces du genre Myocricetodon dans le Miocène supérieur du bassin d'Aı̈t Kandoula (Maroc) 发现两个属的新种Myocricetodon盆地在中新世高于现货交易ıẗKandoula(摩洛哥)
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-08-15 DOI: 10.1016/S1251-8050(01)01613-5
Mouloud Benammi
{"title":"Découverte de deux nouvelles espèces du genre Myocricetodon dans le Miocène supérieur du bassin d'Aı̈t Kandoula (Maroc)","authors":"Mouloud Benammi","doi":"10.1016/S1251-8050(01)01613-5","DOIUrl":"10.1016/S1251-8050(01)01613-5","url":null,"abstract":"<div><p>The Aı̈t Kandoula basin is known for its abundance of micromammal fauna. The systematic study of the fauna of two layers of the Afoud section (AF6 and AF5), highlights the presence of two new species: <em>Myocricetodon afoudensis</em> nov. sp. and <em>Myocricetodon jaegeri</em> nov. sp. These two layers are respectively dated at 10.1 and 6.3 Ma by magnetostratigraphic correlation.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 3","pages":"Pages 187-193"},"PeriodicalIF":0.0,"publicationDate":"2001-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01613-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84563361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Un assemblage d'os grignoté par les rongeurs au Paléogène (Oligocène supérieur, phosphorites du Quercy) 古生代(上渐新世,Quercy磷矿)啮齿动物啃食的骨骼组合
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-08-15 DOI: 10.1016/S1251-8050(01)01609-3
Frédéric Laudet , Philippe Fosse
{"title":"Un assemblage d'os grignoté par les rongeurs au Paléogène (Oligocène supérieur, phosphorites du Quercy)","authors":"Frédéric Laudet ,&nbsp;Philippe Fosse","doi":"10.1016/S1251-8050(01)01609-3","DOIUrl":"10.1016/S1251-8050(01)01609-3","url":null,"abstract":"<div><p>Bone gnawing modifications by rodents at a large scale is a taphonomical feature usually found in Plio-Pleistocene assemblages. We report for the first time such a case within the 26-Myr-old karstic fissure filling assemblage of Pech-Desse (phosphorites of Quercy, Upper Oligocene, MP 28). A selection is observed on small ungulate long bones and other elements with a similar size. As predation evidences are also numerous on these taxa, and because some similar gnawed bones have been observed within the contemporaneous locality of Pech-du-Fraysse, we propose a secondary intervention of theridomyid rodents (maybe <em>Archaeomys</em>) on a carnivore laird.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 3","pages":"Pages 195-200"},"PeriodicalIF":0.0,"publicationDate":"2001-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01609-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83032677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Évolution volcanologique du mont Manengouba (Ligne du Cameroun) ; nouvelles données pétrographiques, géochimiques et géochronologiques 马南古巴山(喀麦隆线)的火山演化;新的岩石学、地球化学和地球年代学数据
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-08-15 DOI: 10.1016/S1251-8050(01)01625-1
Armand Kagou Dongmo , Pierre Wandji , André Pouclet , Jean-Paul Vicat , Alain Cheilletz , David Guimolaire Nkouathio , Pavel Alexandrov , Félix M Tchoua
{"title":"Évolution volcanologique du mont Manengouba (Ligne du Cameroun) ; nouvelles données pétrographiques, géochimiques et géochronologiques","authors":"Armand Kagou Dongmo ,&nbsp;Pierre Wandji ,&nbsp;André Pouclet ,&nbsp;Jean-Paul Vicat ,&nbsp;Alain Cheilletz ,&nbsp;David Guimolaire Nkouathio ,&nbsp;Pavel Alexandrov ,&nbsp;Félix M Tchoua","doi":"10.1016/S1251-8050(01)01625-1","DOIUrl":"10.1016/S1251-8050(01)01625-1","url":null,"abstract":"<div><p>The mount Manengouba is a polygenic volcanic complex of the Cameroon line, which was built in the Quaternary, between 1.55 and 0 Ma, during three stages. The first stage, from 1.55 to 0.7 Ma, corresponds to the building of the Elengoum volcano. The second, between 0.7 and 0.56 Ma, points to the collapse of the Elengoum summit. The third, from 0.56 to 0 Ma, fits with the erection of the Eboga volcano and its caldera sinking, and, from 0.48 Ma, with the adventive fissural activity. The products define an alkaline sodic series, from nepheline-bearing basalts to trachytes. All the lavas evolved by fractional crystallization in a periodically replenished magmatic chamber.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 3","pages":"Pages 155-162"},"PeriodicalIF":0.0,"publicationDate":"2001-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01625-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77103126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 33
New findings and stratigraphical distribution of the Ovummuridae (Palaeozoic calcareous microfossils) 卵微化石科(古生代钙质微化石)的新发现及地层分布
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-08-15 DOI: 10.1016/S1251-8050(01)01624-X
Axel Munnecke , Thomas Servais , Daniel Vachard
{"title":"New findings and stratigraphical distribution of the Ovummuridae (Palaeozoic calcareous microfossils)","authors":"Axel Munnecke ,&nbsp;Thomas Servais ,&nbsp;Daniel Vachard","doi":"10.1016/S1251-8050(01)01624-X","DOIUrl":"10.1016/S1251-8050(01)01624-X","url":null,"abstract":"<div><p>The observation with the scanning electron microscope of polished, etched sections of Palaeozoic limestones enables the discovery of calcareous micro- and nannofossils, which can be attributed to the <em>Incertae Sedis</em> family Ovummuridae Munnecke, Servais and Vachard, 2000. These microfossils are only preserved in Konservat-Lagerstätten without late diagenetic overprint. New findings are made in sections of the Upper Silurian of the Barrandian area, Czech Republic, the Upper Carboniferous of the Donetz basin, Ukraine, the Lower Permian of the Ural mountains, Russia, and the Upper Permian of the Hindu Kush, Afghanistan. The Ovummuridae, which were totally unknown up to now, were possibly very abundant in carbonate platforms of all Palaeozoic periods, at least from the Silurian onward.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 3","pages":"Pages 179-185"},"PeriodicalIF":0.0,"publicationDate":"2001-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01624-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"99089189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Inclusions fluides et isotopes du soufre du gisement Cu–Au de Valea Morii (monts Apuseni, Roumanie) : un télescopage porphyre–épithermal neutre ? Valea Morii(罗马尼亚Apuseni山脉)Cu - Au矿床的流体夹杂物和硫同位素:斑岩-外热中性望远镜?
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-07-31 DOI: 10.1016/S1251-8050(01)01611-1
Anne-Sylvie André-Mayer , Jacques L. Leroy , Éric Marcoux , Catherine Lerouge
{"title":"Inclusions fluides et isotopes du soufre du gisement Cu–Au de Valea Morii (monts Apuseni, Roumanie) : un télescopage porphyre–épithermal neutre ?","authors":"Anne-Sylvie André-Mayer ,&nbsp;Jacques L. Leroy ,&nbsp;Éric Marcoux ,&nbsp;Catherine Lerouge","doi":"10.1016/S1251-8050(01)01611-1","DOIUrl":"10.1016/S1251-8050(01)01611-1","url":null,"abstract":"<div><p>The Valea Morii Cu–Au ore deposit (Apuseni mountains, Romania) is characterised by a spatial association of a porphyry copper (Cu±Au) with a low-sulfidation epithermal deposit (Au). Microthermometric and sulphur isotopic data, obtained on both porphyry and epithermal veins, express a telescoping between these two types of mineralization, which can be explained either by an erosion phenomenon during the hydrothermal activity or by a collapse of the upper part of the hydrothermal system.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 2","pages":"Pages 121-128"},"PeriodicalIF":0.0,"publicationDate":"2001-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01611-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84490721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Modélisation du transport d'un soluté réactif en milieux poreux non saturés Modélisation你运输d 'un solutéréactif en milieux poreux名非saturés
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-07-31 DOI: 10.1016/S1251-8050(01)01607-X
El Hadji Bamba Diaw , François Lehmann , Philippe Ackerer
{"title":"Modélisation du transport d'un soluté réactif en milieux poreux non saturés","authors":"El Hadji Bamba Diaw ,&nbsp;François Lehmann ,&nbsp;Philippe Ackerer","doi":"10.1016/S1251-8050(01)01607-X","DOIUrl":"10.1016/S1251-8050(01)01607-X","url":null,"abstract":"<div><p>Solute transfer in soils may create sharp concentration fronts. The numerical modeling of these fronts remains a difficult problem. The proposed one-dimensional model (Wamos-T) is robust and well adapted to these problems. It is based on operator splitting: discontinuous finite elements combined with a slope limiting procedure is used to discretize the advective term, the dispersive and reactive terms of the transport equation being solved by an implicit finite differences scheme. Compared to a widely used finite element method (Hydrus-1D), Wamos-T provides more accurate results when sharp fronts occur.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 2","pages":"Pages 129-132"},"PeriodicalIF":0.0,"publicationDate":"2001-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01607-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81767358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Le volcanisme acide burdigalien du Sud de la Corse : pétrologie, datation K–Ar, paléomagnétisme 南科西嘉岛的burdigalien酸火山活动:岩石学、K - Ar年代测定、古磁学
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-07-31 DOI: 10.1016/S1251-8050(01)01614-7
Marie-Madeleine Ottaviani-Spella , Marielle Girard , Pierre Rochette , Alain Cheilletz , Michel Thinon
{"title":"Le volcanisme acide burdigalien du Sud de la Corse : pétrologie, datation K–Ar, paléomagnétisme","authors":"Marie-Madeleine Ottaviani-Spella ,&nbsp;Marielle Girard ,&nbsp;Pierre Rochette ,&nbsp;Alain Cheilletz ,&nbsp;Michel Thinon","doi":"10.1016/S1251-8050(01)01614-7","DOIUrl":"10.1016/S1251-8050(01)01614-7","url":null,"abstract":"<div><p>A new rhyolitic tuff outcrop has been discovered in southern Corsica, at Francolu. It shares a calc-alkaline affinity with nearby, previously known, rhyolitic Balistra tuff and dacitic ignimbritic Tre Paduli tuff. A weighted mean age of 19.3±0.5 Ma has been obtained using the K–Ar method on tuff glasses from these three formations. Synchronous emplacement is also indicated by the coherent reverse palaeomagnetic directions, which further imply that only about half of the Corsica–Sardinia rotation was completed at 19 Ma.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 2","pages":"Pages 113-120"},"PeriodicalIF":0.0,"publicationDate":"2001-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01614-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80672666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Les enseignements du petit séisme de Peille (Alpes-Maritimes, France) 佩勒小地震的教训(法国阿尔卑斯海洋)
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-07-31 DOI: 10.1016/S1251-8050(01)01615-9
Françoise Courboulex , Anne-Marie Duval , Anne Deschamps , Antony Lomax , Christophe Larroque
{"title":"Les enseignements du petit séisme de Peille (Alpes-Maritimes, France)","authors":"Françoise Courboulex ,&nbsp;Anne-Marie Duval ,&nbsp;Anne Deschamps ,&nbsp;Antony Lomax ,&nbsp;Christophe Larroque","doi":"10.1016/S1251-8050(01)01615-9","DOIUrl":"10.1016/S1251-8050(01)01615-9","url":null,"abstract":"<div><p>The Peille earthquake (<em>M</em><sub>w</sub>=3.4) occurred on 1st November 1999, 15 km to the north of the cities of Nice, Monaco and Menton. This event was very well recorded by 20 seismological stations located between 6 and 50 km from the epicenter. We used a non-linear location method and showed that the earthquake occurred at shallow depth (3±1.5 km) close to the Peille–Laghet fault trace. Moreover the computed focal mechanism is consistent with the left lateral strike slip movement of this fault. An empirical Green's function deconvolution showed that the rupture occurred on a fault portion smaller than 600 m long. This earthquake was also the occasion to point out remarkable site effect amplifications in some areas of the city of Nice.</p></div>","PeriodicalId":100301,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science","volume":"333 2","pages":"Pages 105-112"},"PeriodicalIF":0.0,"publicationDate":"2001-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8050(01)01615-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72395724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
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