calc-silicate

calc-silicate

[′kalk ′sil·ə·kət]
(geology)
Referring to a metamorphic rock consisting mainly of calcite and calcium-bearing silicates.
References in periodicals archive ?
Copper mineralization is hosted within calc-silicate and skarn altered limestone adjacent to quartz monzonite sills.
The two deposits are separated by a distance of approximately 575 metres along strike and gold bearing zones in both are characterized by varying degrees of shearing, silicification of host rocks and proximity to calc-silicate mineral assemblages.
This strong calc-silicate alteration, that includes garnet, has proven to be a good indicator of base metal mineralisation at Jervois, suggesting close proximity to mineralisation.
If the protolith is siliceous carbonate, then calc-silicate minerals will be part of the mineral paragenesis.
The 400-foot trench exposed 100 feet of calc-silicate rock with abundant quartz veining.
Mineralisation at the Attunga Copper Mine is interpreted to be sub-vertical and occurs in garnet-rich calc-silicate skarn with sulphide minerals including chalcopyrite, bornite and molybdenite.
A Touchstone Resources core hole in 1990, situated 350 metres west of the main "Horst" CS gold target, encountered silica-epidote replaced calc-silicate hornfels, possibly a slump block of mineralized Paleozoic basement rocks from the adjoining "Horst" target area, at depths of 373 to 400 feet in the drillhole, with up to 5-10% pyrite and anomalous gold, silver and arsenic.
Coincident gold, arsenic, antimony and bismuth soil geochemical anomalies are located along the contact between the Sprague Creek quartz monzonite and Rabbitkettle Formation calcareous siltstones which has a well developed calc-silicate skarn, developed over a 2.
All three of the drill holes which targeted the Main Gil calc-silicate horizon intercepted significant gold mineralization.
Several anomalies which show coincident calc-silicate minerals (the host rock for the El Capitan deposit) and iron oxide minerals (the El Capitan mineralization occurs with iron oxide minerals) have been located.
Mineralisation occurs in garnet-rich calc-silicate skarn with sulphide minerals including chalcopyrite, bornite and molybdenite.
The Anuri-Muskox area comprises over 6,000 acres of prospective geology characterized by extensive zones of intense calc-silicate alteration, sulphidation and silicification.