Zobrazeno 1 - 10
of 52
pro vyhledávání: '"J.Ch. Fontes"'
Publikováno v:
Journal of Hydrology. 190:123-140
This paper presents results of the geochemical and isotopic studies on groundwater samples from the Garoua Sandstone Basin, in northern Cameroon. Chemical and environmental isotope data are presented and discussed in terms of the origin of dissolved
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::826fb9a0331a99c0532c75f82da61118
https://doi.org/10.1016/s0022-1694(96)03049-1
https://doi.org/10.1016/s0022-1694(96)03049-1
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 120:79-92
A 12.4 m core taken in Lake Bangong provides a continuous Holocene climatic record. We summarize information on changes in stable isotope and radiocarbon balances in the lake, hydrobiology and vegetal cover in the catchment, deduced from detailed ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5a20f5bcceccb0116fea2e3a6ee0ac1
https://doi.org/10.1016/0031-0182(95)00035-6
https://doi.org/10.1016/0031-0182(95)00035-6
Publikováno v:
Applied Geochemistry. 9:297-309
Seventy-nine samples of formation water from geothermal boreholes, oil-field and ground-water wells, tapping the Dogger (Middle Jurassic) limestone reservoir of the Paris Basin, have been analyzed for their 2H, 18O, TDS, bromide and chloride contents
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::853107bef8b4477d87146dd39766fe29
https://doi.org/10.1016/0883-2927(94)90040-x
https://doi.org/10.1016/0883-2927(94)90040-x
Autor:
J.M. Matray, J.Ch. Fontes
Publikováno v:
Chemical Geology. 109:149-175
Oil fields from the Paris Basin are located in three geological levels: Dogger (Middle Jurassic), Rhaetian and Keuper (Upper Triassic). The origin of water and dissolved salts in saline solutions associated with oil is investigated, using the hypothe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae19267f84f72297cfefc38cdc3b753e
https://doi.org/10.1016/0009-2541(93)90068-t
https://doi.org/10.1016/0009-2541(93)90068-t
Publikováno v:
Quaternary Science Reviews. 12:875-887
Hydrologic and climatic changes in western Tibet since 13,000 BP are inferred from mineralogical and isotopic analyses of lacustrine sediments from the Sumxi-Longmu Co basin. The interpretation is based on isotope data from the modern system. Carbon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6087f953ee300b6a9ad39c59f3db00f0
https://doi.org/10.1016/0277-3791(93)90026-i
https://doi.org/10.1016/0277-3791(93)90026-i
Autor:
Françoise Gasse, J.Ch. Fontes
Publikováno v:
Environmental History and Palaeolimnology ISBN: 9789401055932
On the basis of African examples, the paper draws attention to some geochemical and sedimentological problems which commonly occur in the establishment of a reliable chronology from lacustrine sediments. New results are then provided on the ages of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14639920ef020fffd008b69a2ba574a0
https://doi.org/10.1007/978-94-011-3592-4_47
https://doi.org/10.1007/978-94-011-3592-4_47
Publikováno v:
Eos, Transactions American Geophysical Union. 74:21-22
The isotopic and elemental compositions of groundwater are influenced by climatic conditions at the time of recharge and are therefore indicators of climate change. The potential of aquifers as archives of paleoclimate was discussed at a 3-day confer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd18a061aa6cad53cd2febaae793b2b1
https://doi.org/10.1029/93eo00212
https://doi.org/10.1029/93eo00212
Publikováno v:
Journal of Hydrology. 109:369-385
Isotopic and chemical studies were carried out from June 1985 to June 1986 on a small agricultural morainic water basin (0,14 km2) to determine the different flow components. The pedologic-lithologic profile is divided into four main horizons: (1) at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6153a1f131ff82d946d50343b7ec75e
https://doi.org/10.1016/0022-1694(89)90025-5
https://doi.org/10.1016/0022-1694(89)90025-5
Publikováno v:
Journal of Hydrology. 86:315-327
Stable isotope profiles in soil water in the Sahara have been interpreted in terms of the hydrologic processes taking place. At one site, where the water table is at about 10 m depth, the isotope data are interpreted using the model of Barnes and All
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b560afdb2dead97ee06589a93df50c3
https://doi.org/10.1016/0022-1694(86)90170-8
https://doi.org/10.1016/0022-1694(86)90170-8
Publikováno v:
Geochimica et Cosmochimica Acta. 47:2079-2090
Cryoturbated facies are found at the boundary between soil horizons and Cretaceous chalk. Several types of secondary calcite appear in soil horizons: orange coloured and rounded (partially dissolved) nodules, deeply coloured angular aggregates, trans
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bc2408df9423f9f62ad38d681e070d5
https://doi.org/10.1016/0016-7037(83)90033-9
https://doi.org/10.1016/0016-7037(83)90033-9