rodingite

rodingite

[′rōd·iŋ‚gīt]
(petrology)
A medium- to coarse-grained, commonly calcium-enriched gabbroic rock containing grossular and diallage as essential minerals.
References in periodicals archive ?
The Rodingite dykes' origin is those same gabbro dykes of the region so that during Serpentinisation of Pridotites, the Calcium product of the phenomenon has invaded the gabbro dykes, resulting in formation of Garnet and Hydrogarnet.
are hosted by rodingite dikes that were formed by the hydrothermal alteration of some of the granitic dikes during serpentinization.
These include Baveno, type locality of six mineral species and whose name immediately calls to mind the beryllium mineral bavenite and the baveno twinning in feldspar; the alpine rodingite localities (Val d' Ala, Valle di Viu, Valle di Susa, Bellecombe etc.
The rodingite rocks of the Monviso Massif have produced fine specimens of grossular, as well as diopside, perovskite, titanite, vesuvianite and apatite.
In September 2005 a huge pocket was breached, presumably in the deposit's rodingite vein area, where nearly all the good grossulars, vesuvianites and diopsides have been found in the past.
The quarried rock is a dense serpentinite with mineralized dikes of rodingite, the latter producing outstanding crystallized specimens of grossular, clinozoisite, diopside and clinochlore.
Sharp, slightly modified dodecahedral grossular crystals to 2 cm line cavities in a rodingite vein; the orange-brown to honey-brown crystals cluster densely, in mounds, on mottled gray-green to tan matrix, in specimens from toenail to small-cabinet size.
The vesuvianite crystals are found in a large rodingite dike enclosed in the dunite.
The specimens are presumed to have occurred in rodingite veins in serpentinite at the Rubberoid Asbestos mine.
The oceanic metamorphic event transformed the gabbros into rodingites, while iron and copper sulfides were deposited by hydrothermal activity.