chlorite

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  • noun

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a generally green or black mineral

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References in periodicals archive ?
The metamorphic basement and/or Glenkeen Formation are everywhere separated from the Carboniferous conglomerate-dominated sedimentary successions by faults, marked by chloritic breccia and microbreccia developed within both metamorphic basement and Glenkeen Formation.
4 meters true width) and is comprised of 70% pyrite, 20% chalcopyrite, 5% sphalerite and chloritic host rock and quartz.
The geological setting of the main mineralized trend at Lugushwa consists of chloritic metapelites and quartzite intercalations, with mineralized quartz veins and stockworks occurring as a network of interlocking conjugate sets with trends oriented from NE-SW and E-W to ESE-WNW.
The gold-bearing, low sulfide, quartz vein systems are hosted in graphitic, chloritic and sericitic schists.
At this location, a N-S trending sulphidic pelite is mineralized by E-W trending veinlets of pitchblende uranium mineralization, accompanied by chloritic and sericite alteration.
Chloritic alteration is very strong from 300 to 325 m's.
Two intercepts in the chloritic volcanogenics included visible gold on the basalt contact margin with 11.
folded mineralised bodies hosted in chloritic schists.
As reported previously, five holes (1,645 meters total) were completed at Keefe Lake in late 2011, with two holes encountering significantly anomalous alteration and a third hole containing chloritic alteration at various intervals below the unconformity, a common feature found in the host rocks containing uranium mineralization.
The irregularities of the rock only present its sterile chloritic alterite, as multiple mineralogical analyses have shown (see for instance Giot et al.
85 meter intercept with an average of 40% pyrite in a black chloritic altered felsic tuff, thus explaining the geophysical anomaly.
Five holes (1,645 metres total) were completed in Phase 1 drilling conducted in November and December 2011, with two holes encountering significantly anomalous alteration and another containing chloritic alteration at various intervals below the unconformity, a common feature found in the host rocks containing uranium mineralization.
Beginning at 67 meters depth, and continuing to 158 meters, the hole intersected mineralization with typical chloritic quartz veining, the interval containing a visual estimate of 1.
The figurines from excavated contexts tend to be predominantly ground stone artefacts, made of metavolcanic rocks, quartz and various igneous andesitic rocks, chloritic schist and, occasionally, ground ceramic sherds.
Mineralization is associated with disseminated sulfides and quartz pyrite veining in chloritic and argillically altered andesite.