Palygorskite-bearing fracture fills in the Kinshasa area, DR Congo an exceptional mode of palygorskite vein development.
| dc.contributor.author | Mees, F. | |
| dc.contributor.author | Adriaens, R. | |
| dc.contributor.author | Delgado-Huertas, A. | |
| dc.contributor.author | Delvaux, D. | |
| dc.contributor.author | Lahogue, P. | |
| dc.contributor.author | Mpiana, C. | |
| dc.contributor.author | Tack, L. | |
| dc.coverage.spatial | Africa - Central | |
| dc.coverage.spatial | Congo, The Democratic Republic of the | |
| dc.date | 2019 | |
| dc.date.accessioned | 2024-03-14T13:21:03Z | |
| dc.date.available | 2024-03-14T13:21:03Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/12395 | |
| dc.description | Tectonic fractures in Palaeozoic strata of the Kinshasa area, DR Congo, locally host palygorskite-bearing veins and associated calcite occurrences. The palygorskite deposits are typically massive, with a varying degree of alignment of clay particles, a higher quartz content than the arkose substrate, and a variable amount of smectite (montmorillonite). The associated calcite occurrences are macrocrystalline coatings and infillings, and more fine-grained calcite veins with cataclastic texture. The calcite coatings and infillings formed from solution in earth surface conditions, as recorded by their stable isotope signature. The palygorskite-dominated deposits in the fractures formed at a later stage, in a setting without indications of authigenic mineral formation related to hydrothermal activity or to low-temperature interaction of solutions with the local substrate. The veins most likely formed by vertical infiltration of suspended matter in fractures that extended to a post-Palaeozoic palaeosurface, during or after deposition of palygorskite-bearing Upper Jurassic to Early Cretaceous sediments. This represents an exceptional mode of palygorskite vein development, unrelated to any form of mineral authigenesis that is typically invoked to explain vein-type occurrences of palygorskite and related minerals. | |
| dc.language | eng | |
| dc.title | Palygorskite-bearing fracture fills in the Kinshasa area, DR Congo an exceptional mode of palygorskite vein development. | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.subject.free | Geodynamics and mineral resources | |
| dc.subject.free | Surface environments and collection management | |
| dc.source.title | South African Journal of Geology | |
| dc.source.volume | 122(2) | |
| dc.source.page | 173-186 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.doi | 10.25131/saig.122.0013 | |
| dc.identifier.rmca | 5742 |