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Showing 1 to 4 of 4 for “"Layered Intrusions"”.
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Application of the 190Pt-186Os isotope decay system to dating platinum-group minerals
… geochronometer as a tool for dating ophiolites, layered intrusions and placer platinum mineralisation despite potential derivation of PGM from various isolated chromitites. Analysis of large PGM populations has allowed improvement on published constraints for Pt/Os inter-element fractionation …
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The 'Ins' and 'Outs' of the Bushveld Complex Upper Zone
… The Bushveld Complex is one of the few large layered intrusions in which the entire cumulate stratigraphy is preserved and well-exposed from its base to its roof. Despite this unique feature, relatively little is known about the nature of magmatic differentiation in the uppermost portions of …
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Petrofabric investigation of the sulfide-rich basal zone of the Duluth Complex
… in the SKI, including the unmineralized Duluth Layered Series (DLS) using a combination of techniques. Anisotropy of magnetic susceptibility (AMS) analysis identifies a well-developed, magnetite/titanomagnetite-dominated, pseudo-single-domain (grain size ~0.1–10 µm), oblate magnetic fabric in …
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A petrographical and mineralogical investigation of the rocks of the Bushveld Igneous Complex in the Tauteshoogte-Roossenekal area of the Eastern Transvaal
… the leptite and the felsite. Rocks of the Layered Sequence occupy the eastern half of the area and consist of the Main and Upper Zones which were subdivided into various subzones on the basis of characteristic rock types and marker horizons. Mineralogical investigations are restricted to …