| dc.contributor.author | Cramez, Carlos | |
| dc.contributor.other | Sebastião, Lumen | |
| dc.contributor.other | Sebastião, Adriano | |
| dc.date.accessioned | 2015-04-01T13:30:20Z | |
| dc.date.available | 2015-04-01T13:30:20Z | |
| dc.date.issued | 2014 | |
| dc.description.abstract | This schematic geological cross-section of Angola offshore is representative of the majority of the Atlantic-type divergent margins. It illustrates the main geological features allowing to understand the different petroleum systems occurring, particularly, in South Atlantic divergent margins : (i) Pre-Pangea rocks (Precambrian granite-gneiss basement, volcanic rocks an/ or Paleozoic sediments, more or less, metamorphosed), which lie underneath the pre-rifting unconformity (PRU), in blue in the cross-section ; (ii) The rift-type basins developed during the lengthening of the Pangea supercontinent ; (iii) The breakup unconformity (BUU), which highlight the upper limit of the rift-type basins, in which organic rich lacustrine shales with a parallel internal configuration are potential source-rocks (organic matter type I) ; (iv) The SDRs (seaward dipping reflectors), which, generally, do not have any generating hydrocarbon potential (just 5 m of lacustrine shales are known in Austral basin) ; (v) The BUU is fossilized by SDRs (subaerial volcanism) or by margin infra-salt sediments (forming the mistakenly called by some American geoscientists "sag basin") ; (vi) The Loeme salt basin, which is a twin of the Brazilian salt basin, that is to say, that both basins have always been individualized ; (vii) The transgressive (backstepping) and regressive (forestepping) phases of the post-Pangea continental encroachment cycle ; (v) The interface between these sedimentary phases, correspond to the emplacement of potential marine source-rocks (organic matter type-II) ; (vi) Potential dispersive source rocks (organic matter type III) are possible in the regressive sedimentary interval. | por |
| dc.identifier.uri | http://hdl.handle.net/10284/4722 | |
| dc.language.iso | por | por |
| dc.title | Hydrocarbon Potential of the Infra-salt Strata: Kwanza & Congo Basins | por |
| dc.type | lecture | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | por |
| rcaap.type | lecture |
