The KL-2 pipe, meanwhile, is a multiphase diatreme facies complex with at least four distinct phases of tuffistic (volcaniclastic) serpentine kimberlite breccia which, again, are locally rich in mantle xenoliths
The graben, nearly symmetrical and defined by major faults along each margin [1, 12, 18, 37], may be subdivided into three main segments (Figure 4): (1) the northwestern part, between the Asuncion and Paraguari townships, indicated also by the intragraben Ypacaray rifting and by the presence of Naalkaline mafic-ultramafic plugs carrying mantle xenoliths
(Asuncion Province; age between 66 and 39 Ma; cf.
in this study consisted of pyroxenites, lherzolites and mafic granulites.
Kaersutite and pargasite are amphiboles typical of alkaline basic rocks and metasomatised mantle xenoliths
and their formation occurs early during the crystallization process (e.g.
CPC is actively seeking pathways to help expand the capacity for M/WBEs in New York City and the state by investing in the growth of organizations like Xenolith
who share a mission; of using a community-based approach to expanding the supply of affordable housing and improving overall housing quality.
Inclusions were found at ~10% of localities, and include both autoliths and xenoliths
. Autoliths consist of any Marginal Zone lithology hosted within a younger Marginal Zone lithology whereas xenoliths
consist of Paleoproterozoic(?) gneiss and pervasively recrystallised, ca.
Some of them entrain deep crustal and mantle xenoliths
to the surface, providing the only direct rock samples of the lithosphere available to us.
Albite occurs abundantly in fractures and as drusy coatings on altered granitic xenoliths
in the Coal Hill vein.
(1994): Composition and Sm-Nd isotopic data of the lower crust beneath San Luis Potosi, central Mexico: evidence from granulite-facies xenolith
The nature of the subcontinental lithospheric mantle (SCLM) of the Slave is particularly well defined through geophysical and xenolith
Meyer (1937-1995) for his contributions to the petrology and mineralogy of mantle-derived xenoliths
and kimberlitic rocks and for his services to the mineralogical community.
In one unusual occurrence a xenolith
of hornfelsized shale was observed in situ, in the sill near the contact; the xenolith
, about 1 meter across, was brecciated throughout and permeated by a dense network of narrow fissures lined with labuntsovite and pyrrhotite crystals.