Sentences with word «carbonatite»

A notable feature is that the Ambar Dongar carbonatite, both ferrocarbonatite and calciocarbonatite varieties, is extremely rich in REE (total REE 1025 — 31 117 ppm) with ferrocarbonatite richer in REE than calciocarbonatite.

To create such a feature, lava would have to remain fluid over great distances, prompting geologists to suggest that Venusian volcanoes discharge carbonatite lava, just like that one oddball volcano on Earth, Ol Doinyo Lengai.

A field trip to the Upper Fir carbonatite - hosted niobium - tantalum deposit in the Blue River area, east - central British Columbia....

However, recent modeling of the early evolution of the internal temperature of the planet, together with geochemical studies of the composition of the oldest carbonatites and basalts, do not support such cooling.

On the basis of trace element modelling, the authors proposed a model in which the contributions of CO2 - rich fluids and heat supplied by the Deccan plume metasomatized the SCLM (carbonated garnet lherzolite) at 100 km for the production of parental carbonated silicate magma that underwent liquid immiscibility at crustal depth for nephelinite and carbonatite production.

His dissertation was on the geological origin of carbonatites based on his analysis of the isotopic ratio of strontium (87Sr / 86Sr).

Chandra et al. (2017) demonstrate through detailed mineralogical and geochemical compositions and geochemical modelling that the metasomatism of the SCLM below the Deccan was key to a possible petrogenetic link between the main Deccan eruption event and the Ambar Dongar carbonatite.

Despite its dark hue, carbonatite lava has the lowest viscosity of any known lava, making it extremely runny.

It's the only active volcano in the world that spews «carbonatite» lava, composed primarily of carbonate minerals rather than more common basalt lava.

One of the major difficulties in testing the LIP — carbonatite link is the nature of the mantle source for the primary carbonatite melt: that is, whether the parental carbonatite magma was generated from the SCLM or from deep mantle sources.

Carbonatites are spatially associated with several LIPs, including those in Gondwana, but their temporal relationship is not well established, which may, indeed, provide insight into carbonatite genesis and its link with the LIPs.

The possible genetic link of the c. 65 Ma main Deccan eruption event to the Ambar Dongar carbonatite (40Ar / 39Ar dating 65 ± 0.3 Ma: Ray & Pande 1999), the youngest Indian carbonatite occurrence, is thus of interest.

Ironically for our green friends, the ore comes from a type of rock called «carbonatite» which is a relatively rare and unusual type of igneous rock composed primarily of carbonate minerals.