metasediment


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metasediment

[¦med·ə′sed·ə·mənt]
(geology)
A sediment or sedimentary rock which shows evidence of metamorphism.
(petrology)
Metamorphic rock formed from sedimentary rock.
References in periodicals archive ?
The drill hole exited Hobbs Pipe 1 near surface and entered a substantial alteration zone, progressing through garnet-pyroxene skarn (hosting the newly discovered mineralisation) and then into sericite-chlorite-quartz-sulphide (pyrite-arsenopyrite-pyrrhotitechalcopyrite) altered metasediment until end of hole.
The project area is dominated by Achaean granite and granite gneiss (commonly laterised) with minor units of metasediment, meta-volcanics and Proterozoic dolerite dykes.
Hole GHD007 is oriented toward the NE, and was designed to target the NE edge of Hobbs Pipe 1 near the surface, and continue on to test the geology beneath historical highly anomalous hornfels metasediment hosted mineralisation.
3g/t gold were received over a 400m x 100m, occurring along a sheared granite and metasediment contact.
The Project is a metasediment hosted VMS (volcanogenic massive sulphide) system in forest terrain about 17 kilometres northwest of the town of Boyabat in the Sinop District of the Black Sea region, northern central Turkey.
Company geologists are currently working on structural interpretation of faults in a 2km section of the western metasediment belt between the Tel and Bob Zones.
The magnetite mineralisation is hosted by steeply dipping, fine-grained magnetite-rich metasediments; granite containing coarse magnetite; and, semi-massive to massive magnetite within a predominately granite and metasediment sequence.
Regional mapping undertaken by BRGM in 1986 identified a NE-SW trending package of Archaean to Proterozoic age quartzitic metasediment, gneiss and amphibolite, as well as numerous itabirite units containing millimetre to centimetre thick bands of magnetite.
Mineralization identified to date by trenching and drilling, spread out over an approximately 975 meter East - West distance on the Zone 2 gold-in-soil trend, appears to be hosted by a series of sill - like granitoid bodies hosted within a folded metasediment - metavolcanic rock sequence.
Mineralization identified to date by trenching and drilling on Zone 2 appears to be hosted by a series of sill - like granitoid bodies hosted within a folded metasediment - metavolcanic rock sequence.
5 km strike length near the southern contact of the tonalite intrusion with metasediments, drilling 2,900 m in 11 holes.
The second concerns dravites from clastic metasediments, metapegmatite and marbles intercalated in the metasedimentary sequence containing tsavorite nodules, which reflect a magmatic source for clastic dravite and probably an evaporitic one for dravite in marble.