Zobrazeno 1 - 10
of 61
pro vyhledávání: '"H. J. Tobschall"'
Publikováno v:
Geofísica Internacional, Vol 27, Iss 4, Pp 641-663 (1988)
Se presentan datos de elementos mayores, elementos trazas y tierras raras de rocas calco-alcalinas y alcalinas de la parte este del Cinturón Volcánico Transmexicano (TMVB), así como conclusiones acerca de su origen y de su significado tectónico.
Externí odkaz:
https://doaj.org/article/80359f3bfd2845ff95c9a9695ae62814
Publikováno v:
Geofísica Internacional, Vol 27, Iss 4, Pp 519-542 (1988)
En la Sierra Madre del Sur (México) se han identificado nueve complejos intrusivos cuya composición varia de trondjemítica a granítica (Negendank et al., 1985). Con base en datos estratigráficos y en menor grado radiométricos, se puede deducir
Externí odkaz:
https://doaj.org/article/5bccdf0506534235bb0e9cc7cab39441
Numerous minette dykes intersect the Precambrian crystalline baseINTRODUCTION ment of Schirmacher Oasis, East Antarctica. This study presents Minette magmas are generally thought to represent smallnew Sr, Nd, Pb and O isotope data for 11 minette samp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79eca3081da543df96df354a9ed81487
http://doc.rero.ch/record/303262/files/421387.pdf
http://doc.rero.ch/record/303262/files/421387.pdf
Autor:
Leopoldo G. Mendoza-Espinosa, K. C. Lugo-Ibarra, Leonardo Ruiz-Montoya, Victor F. Camacho-Ibar, Rohana Chandrajith, H. J. Tobschall, L. W. Daesslé, Ana Luz Quintanilla-Montoya
Publikováno v:
Environmental Geology. 58:419-429
The hydrogeochemistry of 26 wells belonging to ten different aquifers in the county of Ensenada, Baja California, is studied. These wells are all used to supply the rural communities in the region, which comprise ~37,000 inhabitants, excluding the ci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::808fe7d0f6ea5ddca9f087897bda81af
https://doi.org/10.1007/s00254-008-1512-9
https://doi.org/10.1007/s00254-008-1512-9
Autor:
C.B. Dissanayake, K. B. Ranawana, Nadeesha H. Koralegedara, H. J. Tobschall, Rohana Chandrajith
Publikováno v:
Environmental Geology. 57:17-28
Forest die back has been observed from 1980s in the montane moist forest of Horton Plains in the Central Sri Lanka for which the aetiology appears to be uncertain. The concentration levels of Na, K, Ca, Mg, Fe, Mn, Cu, Ni, Zn and Pb in canopy leaves,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a46dc038cb5b6ca9ed1ce3c2f9ab686f
https://doi.org/10.1007/s00254-008-1278-0
https://doi.org/10.1007/s00254-008-1278-0
Publikováno v:
Chemosphere. 69:1525-1532
The adsorptive interactions of Hg(II) with gibbsite-rich soils (hereafter SOIL-g) were modeled by 1-pK surface complexation theory using charge distribution multi-site ion competition model (CD MUSIC) incorporating basic Stern layer model (BSM) to ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1276dcad5f6f01508a7bec90ffdd11c5
https://doi.org/10.1016/j.chemosphere.2007.05.091
https://doi.org/10.1016/j.chemosphere.2007.05.091
Autor:
Rohan Weerasooriya, H. J. Tobschall
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 264:68-74
Interfacial properties of pyrite–water suspensions were examined by potentiometric titrations. Initial experiments show that the dissolution of pyrite occurs even under anaerobic conditions. The role played by H+, OH−, Fe2+ and S2− as potential
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89b362dfbf5eb96c743f9b9e1694ca19
https://doi.org/10.1016/j.colsurfa.2005.05.012
https://doi.org/10.1016/j.colsurfa.2005.05.012
Publikováno v:
Chemosphere. 58:1415-1420
Concentrations of Ti, Ga, As, Sc, Zr, Sn, Hf, Th, U and Y have been determined for 70 paddy soils from 14 villages, selected throughout Sri Lanka by means of ICP-MS. The mean elemental contents of all paddy soil samples were 6120 Ti, 14.1 Ga, 0.84 As
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::124a57e6535e8e8451caa3ff86fd1e91
https://doi.org/10.1016/j.chemosphere.2004.09.090
https://doi.org/10.1016/j.chemosphere.2004.09.090
Publikováno v:
Applied Geochemistry. 20:1-21
In the northern part of the Indian sub-continent, the Ganga alluvial plain (GAP) feeds its weathering products to the Ganga–Brahmaputra River system, one of the world’s largest fluvial systems. The authors present a geochemical study of the GAP w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6aaf253d345776d83f72021aac58566e
https://doi.org/10.1016/j.apgeochem.2004.07.005
https://doi.org/10.1016/j.apgeochem.2004.07.005
Publikováno v:
Paddy and Water Environment. 2:163-169
Very few studies deal with the rare earth element (REE) content within paddy soil systems. This paper presents, for the first time, the distribution of REEs in paddy soils from three different regions in Sri Lanka. Seventy samples from the Kalutara a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a1192329176f2605e7d335fff036d7a
https://doi.org/10.1007/s10333-004-0055-2
https://doi.org/10.1007/s10333-004-0055-2