supracrustal rocks

supracrustal rocks

[¦sü·prə′krəst·əl ′räks]
(geology)
Rocks that overlie basement rock.
References in periodicals archive ?
Mineralization at Slttberg is hosted by 1.8-1.9 Ga (Svecofennian) supracrustal rocks (metavolcanics and metasediments) located along the southwestern flank of a large gabbroic intrusive complex.
Borborema Province covers approximately 380,000 [km.sup.2] and is marked by a mosaic of tectonic blocks: a Paleoproterozoic basement and scattered Archean nuclei, Meso to Neoproterozoic supracrustal rocks, and large intrusions of granites (Van Schmus et al., 2008; Silva, Ferreira, Lima, Sial, & Silva, 2015).
Zone 2 comprises magnetically low-relief supracrustal rocks of the Lake Harbour Group, which are intruded by magnetite-bearing plutonic rocks and subsequently folded.
Good matches are evident between the Carrabassett and Ganderia supracrustal rocks with strong similarities at ~600 Ma and the common peak centered at ~1200 Ma.
Crustal evolution of the Svecofennian and Karelian domains during 2.1-1.79 Ga, with special emphasis on the geochemistry and origin of 1.93-1.91 Ga gneissic tonalites and associated supracrustal rocks in the Rautalampi area, central Finland.
Structurally, Bergslagen consists of an intrusive granite complex surrounded by supracrustal rocks; metasediments and metavolcanics that date to over 2,000 Ma and that form the host for the district's rich mineral resources.
DM is found in supracrustal rocks of mid- to lower-Proterozoic age that are surrounded by variably migmatised and deformed micaceous quartzo-feldspathic gneisses of the Chiquitania Complex.
The Archean supracrustal rocks underlying most of the claim group are about 3.3 km south of the east-striking Destor-Porcupine Fault Zone, which is spatially associated with many of the major gold deposits in the Abitibi Greenstone belt.
Correlations between the two data types can be seen over the supracrustal rocks (labelled A and B on Fig.
The paper deals with the composition of metamorphosed supracrustal rocks, variation in their mineralogical composition, and regional and local estimates of metamorphic pressure-temperature (P-T) conditions and ages.
All of the supracrustal rocks on Fogo Island are openly folded about axial planes trending northeast and dipping about 65[degrees] to the south.