Zobrazeno 1 - 10
of 289
pro vyhledávání: '"Gitologie"'
Publikováno v:
European Journal of Mineralogy. 7:151-166
I Abstract: The fluids trapped by emerald, dolomite and pyrite in the Colombian emerald deposits consist predom- inantly of Na-Ca brines with some KC1. The similarity of fluid composition in the eastern and western emerald zones demonstrates the homo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::099fe99ee597fd27ada9d52d899576b9
https://doi.org/10.1127/ejm/7/1/0151
https://doi.org/10.1127/ejm/7/1/0151
Publikováno v:
Earth and Planetary Science Letters. 120:473-485
Emerald, occurring in K-metasomatic rocks developed at the contact of the Carnaiba leucogranite with serpentinite (Bahia State, Brazil), has been dated using an original 40Ar/39Ar procedure. It combines step heating and spot fusion experiments on two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f8ff004a6f5bedde287ecffaae5d2b7
https://doi.org/10.1016/0012-821x(93)90258-b
https://doi.org/10.1016/0012-821x(93)90258-b
Publikováno v:
Ore Geology Reviews. 8:503-523
The Santa Rita gold deposit (Central Goias, Brazil) is hosted by Middle to Upper Proterozoic carbonate-pelite sequences of the Paranoa Group that have been metamorphosed in the greenschist facies. The ore is contained in pyrite-bearing quartz-carbona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e91fb3b43c9e699a4056530df3e62538
https://doi.org/10.1016/0169-1368(93)90042-w
https://doi.org/10.1016/0169-1368(93)90042-w
Présentation des principaux résultats obtenus lors de la campagne de terrain et d'étude 2007 : différenciation des silex lacustres tertiaires, caractérisation des types gîtologiques au MEB et identification des lieux de collecte, caractérisati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______166::1584344ba97b0f344cf0c41df2fe5b49
https://shs.hal.science/halshs-00305335
https://shs.hal.science/halshs-00305335
Publikováno v:
Economic Geology. 85:1010-1023
Two typical lateritic weathering profiles (Jacuba ahd Angiquinho) from the Niquelandia Ni deposits, Brazil, were studied in order to establish the petrological relationship between the supergene Ni products and the parental pyroxenes. Frbm the base t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::617ba134d606ea354dc7a21aacb2658e
https://doi.org/10.2113/gsecongeo.85.5.1010
https://doi.org/10.2113/gsecongeo.85.5.1010
Présentation succinte des principaux résultats obtenus lors de la campagne de terrain et d'étude 2006.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______166::fc33551f3c781b8178519462bf25e524
https://shs.hal.science/halshs-00299919
https://shs.hal.science/halshs-00299919