Results 1 to 10 of about 14,415 (244)
Diamond preservation in the lithospheric mantle recorded by olivine in kimberlites [PDF]
Nature Communications, 2023 The diamond potential of kimberlites is difficult to assess due to several mantle and magmatic processes affecting diamond content. Traditionally, initial evaluations are based on the compositions of mantle-derived minerals (garnet, chromite ...
Andrea Giuliani +8 more
doaj +3 more sources
Geochemistry, Geophysics, Geosystems, 2022 Despite the scientific and economic significance of kimberlites and related magmas, their origin is unclear. Here, we address this issue using whole‐rock and perovskite‐derived Sr‐Nd‐Hf isotopes for the three occurrences of kimberlite, lamproites and ...
Hayden Dalton +7 more
doaj +2 more sources
Primordial neon and the deep mantle origin of kimberlites [PDF]
Nature CommunicationsThe genesis of kimberlites is unclear despite the economic and scientific interest surrounding these diamond-bearing magmas. One critical question is whether they tap ancient, deep mantle domains or the shallow convecting mantle with partial melting ...
Andrea Giuliani +10 more
doaj +2 more sources
DNA sequencing, microbial indicators, and the discovery of buried kimberlites [PDF]
Communications Earth & Environment, 2023 Population growth and technological advancements are placing growing demand on mineral resources. New and innovative exploration technologies that improve detection of deeply buried mineralization and host rocks are required to meet these demands.
Rachel L. Simister +6 more
doaj +2 more sources
Kimberlite eruptions driven by slab flux and subduction angle [PDF]
Scientific Reports, 2023 Kimberlites are sourced from thermochemical upwellings which can transport diamonds to the surface of the crust. The majority of kimberlites preserved at the Earth’s surface erupted between 250 and 50 million years ago, and have been attributed to ...
Ben R. Mather +4 more
doaj +2 more sources
Mapping global kimberlite potential from reconstructions of mantle flow over the past billion years. [PDF]
PLoS ONE, 2022 Kimberlites are the primary source of economic grade diamonds. Their geologically rapid eruptions preferentially occur near or through thick and ancient continental lithosphere.
Anton Grabreck +2 more
doaj +2 more sources
Geochemistry, Geophysics, Geosystems, 2015 Different versions of a composite apparent polar wander (APW) path of variably selected global poles assembled and averaged in North American coordinates using plate reconstructions show either a smooth progression or a large (∼30°) gap in mean ...
Dennis V. Kent +4 more
doaj +2 more sources
Journal of Petrology, 2023 ‘Transitional kimberlite’ is a collective term previously used to classify rocks occurring in southern Africa that show bulk rock geochemical and Sr–Nd isotope features intermediate between (cratonic) lamproites and kimberlites. However, it is now well
S. Sarkar +6 more
semanticscholar +1 more source
Olivine in Kimberlites: Magma evolution from deep mantle to eruption
Journal of Petrology, 2022 Elucidating the origin, composition and physical properties of primary kimberlite melts is crucial to our understanding of their source, petrogenesis, ascent mechanisms and ultimately the origin of diamonds.
A. Abersteiner +4 more
semanticscholar +1 more source
Trends and rhythms in carbonatites and kimberlites reflect thermo-tectonic evolution of Earth
Geology, 2022 Earth’s thermo-tectonic evolution determines the way the planet’s interior and surface interact and shows temporal changes in both trends and periodic rhythms.
Shuangliang Liu +9 more
semanticscholar +1 more source