[1] Orogens with multiple (ultra)high-pressure ((U)HP) and (ultra)high-temperature ((U) HT) metamorphic events provide a complex but telling record of oceanic and continental interaction. The Early Paleozoic history of the “Heart of China,” the Qinling orogenic collage, offers snapshots of at least three (U)HP and two (U)HT metamorphic events. The preservation of remnants of both oceanic and co...

In the Western Alps, while many P–T constraints are available for high-grade units, dataset low-grade units located along westernmost edge of belt remains scarcer and incomplete. To face these uncertainties, we quantify first time metamorphic peak conditions Marguareis Unit, a fragment European margin (Briançonnais Domain) regarded till now as very-low-grade unit, exposed boundary between Marit...

The Cubito-Moura Unit is a high-P metamorphic succession that occurs in the southern part of Ossa-Morena Complex (SW Iberian Massif). It includes series metasedimentary, metafelsic and metamafic rocks affected by high-P, low to intermediate-T event during Late Devonian times. Geochemistry metabasic reveals generation protoliths occurred supra-subduction zone setting Ediacaran Early Ordovician t...

The pegmatitic rocks located in the south-east of Côte d'Ivoire between Comoé basin and Sefwi belt are subject this study. geology region consists gneisses, granites, microgranites, amphibolites, mylonites metasediments. All these generally crosscut by quartz pegmatite lodes. petrographic studies allow us to discriminate four groups pegmatites on basis mineralogy: (i) beryl-muscovite bearing (A...

Major and trace elements in omphacite, including hydrogen, were determined eclogites from two Variscan basement complexes Germany: Erzgebirge (EG) Fichtelgebirge (FG). eclogite is derived three units, showing different peak pressure (P) temperature (T) conditions (Unit 1: 840–920°C/?30 kbar, Unit 2: 670–730°C/24–26 3: 600–650°C/20–22 kbar). The of FG (690–750°C/25–28 kbar) resemble those EG 2. ...

Nanometric solid inclusions in diamond incorporated in garnet and zircon from felsic gneiss of the Kokchetav massif, Kazakhstan, have been examined utilizing electron microscopy and focused ion beam techniques. Host garnet and zircon contain numerous pockets of multiple inclusions, which consist of 1–3 diamond crystals intergrown with quartz, phengite, phlogopite, albite, K-feldspar, rutile, ap...