The Source of the Great Dyke, Zimbabwe, and Its Tectonic Significance: Evidence from Re‐Os Isotopes
@article{Schoenberg2003TheSO, title={The Source of the Great Dyke, Zimbabwe, and Its Tectonic Significance: Evidence from Re‐Os Isotopes}, author={Ronny Schoenberg and Thomas F. N{\"a}gler and Edwin Gnos and Jan D. Kramers and Balz S. Kamber}, journal={The Journal of Geology}, year={2003}, volume={111}, pages={565 - 578} }
Re‐Os data for chromite separates from 10 massive chromitite seams sampled along the 550‐km length of the 2.58‐Ga Great Dyke layered igneous complex, Zimbabwe, record initial 187Os/188Os ratios in the relatively narrow range between 0.1106 and 0.1126. This range of initial 187Os/188Os values is only slightly higher than the value for the coeval primitive upper mantle (0.1107) as modeled from the Re‐Os evolution of chondrites and data of modern mantle melts and mantle derived xenoliths. Analyses…
37 Citations
Age and origin of peridotitic diamonds from Venetia, Limpopo Belt, Kaapvaal-Zimbabwe craton
- Geology
- 2009
Rhenium–Osmium Isotope and Platinum-Group Element Constraints on the Origin and Evolution of the 1·27 Ga Muskox Layered Intrusion
- Geology
- 2008
Platinum-group element (PGE: Os, Ir, Ru, Pt, Pd) and Re^Os isotope systematics determined for the entire preserved stratigraphy of the 1 27 Ga Muskox intrusion provide an exceptional view of magma…
Aeromagnetic interpretation in the south-central Zimbabwe Craton: (reappraisal of) crustal structure and tectonic implications
- GeologyInternational Journal of Earth Sciences
- 2015
Regional aeromagnetic data from the south-central Zimbabwe Craton have been digitally processed and enhanced for geological and structural mapping and tectonic interpretation integrated with gravity…
Hydrothermal Alteration in the Main Sulfide Zone at Unki Mine, Shurugwi Subchamber of the Great Dyke, Zimbabwe: Evidence from Petrography and Silicates Mineral Chemistry
- Geology
- 2017
The main platinum-group element (PGE) occurrence in the Great Dyke of Zimbabwe, the Main Sulfide Zone (MSZ), is a tabular stratabound layer hosted in pyroxenites. A petrographic and silicate…
Rhenium–osmium isotopes and platinum-group elements in the Rum Layered Suite, Scotland: Implications for Cr-spinel seam formation and the composition of the Iceland mantle anomaly
- Geology, Environmental Science
- 2009
Asteroid impact connections of crustal evolution*
- Geology
- 2010
Advances in isotopic age determinations increasingly point to the episodic nature of the evolution of lithosphere and crust, and in this paper well-documented field and geochemical evidence is to be…
References
SHOWING 1-10 OF 71 REFERENCES
Resolving crystallisation ages of Archean mafic–ultramafic rocks using the Re–Os isotope system
- Environmental Science, Geology
- 2000
Proterozoic lithospheric mantle source for the Prairie Creek lamproites: Re-Os and Sm-Nd isotopic evidence
- Geology
- 1995
Geochemical and isotopic studies of the Cretaceous (106 Ma) Prairie Creek olivine lamproites in southwestern Arkansas indicate that these diamond-bearing ultrapotassic magmas were derived from…