Matches in SemOpenAlex for { <https://semopenalex.org/work/W2795782453> ?p ?o ?g. }
Showing items 1 to 79 of
79
with 100 items per page.
- W2795782453 abstract "The formation of layered intrusions remains one of the most important, yet unresolved issues in the study of mafic-ultramafic systems, although they are of major economic significance, hosting more than 80 % of the world's platinum-group element (PGE) resource. In many layered intrusions, PGE mineralisation is associated with stratigraphic intervals that are characterised by pronounced igneous layering. Thus, the origin of layering and the emplacement mechanism of individual layers are closely related to the formation of PGE deposits. In this study, field-based and analytical evidence from the Bushveld Complex of South Africa and the Monchegorsk Complex in Russia is used to gain a better understanding of the small- and large-scale processes associated with the emplacement of layered intrusions. Detailed examination of drill core and field exposures suggest that sill-like intrusions of crystal mushes play an important role in the formation of layered intrusions, especially in the lower ultramafic portions of large complexes. In contrast, the in situ Sr isotope analysis of plagioclase from the upper portion of the Bushveld Complex indicates that the more mafic portions may also crystallise in situ from crystal-poor magmas, which can also undergo mixing. Moreover, mineralogical and microtextural work based on high-resolution elemental mapping highlights the importance of melt migration at different stages of cumulate solidification as a consequence of displacement by convecting interstitial liquids and compaction. Further, broadly stratiform PGE mineralisation in the Monchegorsk Complex cannot always be explained by a classic PGE reef model, in which the mineralised horizon marks the transition from sulfide-undersaturated to sulfide-saturated conditions. It is more likely that preformed sulfides were entrained in crystal mushes and emplaced into a semi-consolidated cumulate pile at different levels of the layered intrusion. Ultimately, thermal modelling shows that a multi-stage emplacement history of a complex should be regarded as highly prospective with respect to PGE-Ni-Cu mineralisation." @default.
- W2795782453 created "2018-04-13" @default.
- W2795782453 creator A5047481425 @default.
- W2795782453 date "2017-01-01" @default.
- W2795782453 modified "2023-09-23" @default.
- W2795782453 title "New approaches in understanding layered intrusions: field-based and analytical evidence from the Bushveld and Monchegorsk complexes" @default.
- W2795782453 hasPublicationYear "2017" @default.
- W2795782453 type Work @default.
- W2795782453 sameAs 2795782453 @default.
- W2795782453 citedByCount "0" @default.
- W2795782453 crossrefType "dissertation" @default.
- W2795782453 hasAuthorship W2795782453A5047481425 @default.
- W2795782453 hasConcept C119127063 @default.
- W2795782453 hasConcept C127313418 @default.
- W2795782453 hasConcept C139347428 @default.
- W2795782453 hasConcept C151730666 @default.
- W2795782453 hasConcept C161790260 @default.
- W2795782453 hasConcept C167284885 @default.
- W2795782453 hasConcept C17409809 @default.
- W2795782453 hasConcept C176055353 @default.
- W2795782453 hasConcept C185592680 @default.
- W2795782453 hasConcept C2776062231 @default.
- W2795782453 hasConcept C2776268066 @default.
- W2795782453 hasConcept C2779181077 @default.
- W2795782453 hasConcept C2779870107 @default.
- W2795782453 hasConcept C2781251403 @default.
- W2795782453 hasConcept C40201923 @default.
- W2795782453 hasConcept C518104683 @default.
- W2795782453 hasConcept C55493867 @default.
- W2795782453 hasConcept C5900021 @default.
- W2795782453 hasConcept C59822182 @default.
- W2795782453 hasConcept C86803240 @default.
- W2795782453 hasConceptScore W2795782453C119127063 @default.
- W2795782453 hasConceptScore W2795782453C127313418 @default.
- W2795782453 hasConceptScore W2795782453C139347428 @default.
- W2795782453 hasConceptScore W2795782453C151730666 @default.
- W2795782453 hasConceptScore W2795782453C161790260 @default.
- W2795782453 hasConceptScore W2795782453C167284885 @default.
- W2795782453 hasConceptScore W2795782453C17409809 @default.
- W2795782453 hasConceptScore W2795782453C176055353 @default.
- W2795782453 hasConceptScore W2795782453C185592680 @default.
- W2795782453 hasConceptScore W2795782453C2776062231 @default.
- W2795782453 hasConceptScore W2795782453C2776268066 @default.
- W2795782453 hasConceptScore W2795782453C2779181077 @default.
- W2795782453 hasConceptScore W2795782453C2779870107 @default.
- W2795782453 hasConceptScore W2795782453C2781251403 @default.
- W2795782453 hasConceptScore W2795782453C40201923 @default.
- W2795782453 hasConceptScore W2795782453C518104683 @default.
- W2795782453 hasConceptScore W2795782453C55493867 @default.
- W2795782453 hasConceptScore W2795782453C5900021 @default.
- W2795782453 hasConceptScore W2795782453C59822182 @default.
- W2795782453 hasConceptScore W2795782453C86803240 @default.
- W2795782453 hasLocation W27957824531 @default.
- W2795782453 hasOpenAccess W2795782453 @default.
- W2795782453 hasPrimaryLocation W27957824531 @default.
- W2795782453 hasRelatedWork W1525212908 @default.
- W2795782453 hasRelatedWork W1564989177 @default.
- W2795782453 hasRelatedWork W1969647247 @default.
- W2795782453 hasRelatedWork W1987329135 @default.
- W2795782453 hasRelatedWork W2002005281 @default.
- W2795782453 hasRelatedWork W2007731977 @default.
- W2795782453 hasRelatedWork W2029714144 @default.
- W2795782453 hasRelatedWork W2071949940 @default.
- W2795782453 hasRelatedWork W2087586233 @default.
- W2795782453 hasRelatedWork W2099849171 @default.
- W2795782453 hasRelatedWork W2150023245 @default.
- W2795782453 hasRelatedWork W2180899413 @default.
- W2795782453 hasRelatedWork W2325586588 @default.
- W2795782453 hasRelatedWork W2376210280 @default.
- W2795782453 hasRelatedWork W2595822435 @default.
- W2795782453 hasRelatedWork W2755217827 @default.
- W2795782453 hasRelatedWork W3005839589 @default.
- W2795782453 hasRelatedWork W3185696656 @default.
- W2795782453 hasRelatedWork W67389733 @default.
- W2795782453 hasRelatedWork W1853302714 @default.
- W2795782453 isParatext "false" @default.
- W2795782453 isRetracted "false" @default.
- W2795782453 magId "2795782453" @default.
- W2795782453 workType "dissertation" @default.