Consistent detachment of supracrustal rocks from a fixed subduction depth in the Cyclades
Earth and Planetary Science Letters, 2022 While subduction zones recycle Earth's crust back into the mantle, high pressure metamorphic rocks exposed at the surface testify to occasional crustal subduction failure. Balancing the budget of Earth's recycling factory requires a fundamental comprehension of how and when some crustal rocks are returned to the surface.
Bertram Uunk +6 more
openaire +4 more sources
Geochemistry and tectonic setting of the supracrustal rocks from the central part of the Bundelkhand craton, India [PDF]
JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2019 Supracrustal rocks (mafics and ultramafics) occurs along with banded iron formation, and felsic volcanics around Babina, Dhaura, and Mauranipur linear east-west trends in central part of the Bundelkhand craton represent Archean crust.
M. M. Singh, Vinod K. Singh
doaj +2 more sources
Paleozoic supracrustal rocks near Cheticamp, Nova Scotia [PDF]
Atlantic Geology, 1982 Near Cheticamp, northwestern Cape Breton Island, a sequence of supracrustal rocks overlies and cuts granite previously dated at 530±44 million years, as veil as older, presumably Precambrian gneisses. Rhyolite dikes feeding the supracrustal sequence yielded zircons giving a U-Pb discordia age of 439±7 million years (late Ordovician or Silurian).
Currie, K. L.
core +4 more sources
The earliest Paleoproterozoic supracrustal rocks in Koillismaa, northern Finland - Their petrographic and geochemical characteristics and lithostratigraphy [PDF]
Bulletin of the Geological Society of Finland, 2003 The 2.44 Ga Koillismaa layered igneous complex (KLIC) in northern Finland is interpreted to have formed as a consequence of early Paleoproterozoic continental rifting.
L.S. Lauri, T. Karinen, J. Räsänen
doaj +2 more sources
Mixed metamorphic and fluid graphite deposition in Palaeoproterozoic supracrustal rocks of the Lewisian Complex, NW Scotland [PDF]
, 2021 Graphite deposits may form alternatively by metamorphism of sedimentary rocks and from fluids. Both types occur in supracrustal successions within the Lewisian Complex of Northwest Scotland, and similarly in Palaeoproterozoic supracrustal rocks across ...
Brolly, Connor +7 more
core +1 more source
SIMS U-Pb, Sm-Nd isotope and geochemical study of an arkosite-amphibolite suite, Peräpohja Schist Belt: Evidence for ca. 1.98 Ga A-type felsic magmatism in northern Finland [PDF]
Bulletin of the Geological Society of Finland, 2005 In the northern and north-eastern part of the Perädpohja Schist Belt, northern Finland, an extensive supracrustal rock unit has been identified which is composed of alternating amphibolitic and arkositic components.
E. Hanski, H. Huhma, V. Perttunen
doaj +1 more source
Lithosphere, 2022 The Great Indian Proterozoic Fold Belt (GIPFOB) is a curviplanar highly-tectonized zone of Precambrian crystalline rocks. In the GIPFOB, the N/NNE-striking western arm (the Aravalli Delhi Fold Belt, ADFB) and the E-striking southern arm consisting of the
Anwesa Banerjee +4 more
doaj +1 more source
Structural evolution of the Vuotso area, Finnish Lapland [PDF]
Bulletin of the Geological Society of Finland, 2003 The Vuotso area is structurally interesting because the fold interference pattern in rocks of central Lapland changes into thrust-related foliation of the Lapland Granulite Belt.
M. Nironen, I. Mänttäri
doaj +1 more source
The 1.88 Ga old Mäntylä Complex, central Finland: emplacement and deformation of mafic to felsic plutonic rocks and associated Mo mineralization [PDF]
Bulletin of the Geological Society of Finland, 1992 The Mäntylä complex is part of the extensive Central Finland Granitoid Complex. The intrusive sequence was established from contact relations as well as from structural and petrographic criteria.
M. Nironen, K. Front
doaj +1 more source
Seawater signatures in the supracrustal Lewisian Complex, Scotland [PDF]
, 2022 Marble in the supracrustal rocks of the Lewisian Complex, Tiree, includes chlorine-bearing amphiboles, chlorine-rich apatite, sulphur-rich scapolite, albite and phlogopite, all of which are regarded as evidence for evaporites in other metamorphosed ...
Parnell, John +6 more
core +1 more source