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Showing 1 to 3 of 3 for “"hornblende gneiss"”.
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Petrology and contact relationships, SW portion PC Mullen Creek mafic complex, Medicine Bow Mts., Wy.
… invaded a metavolcanic sequence (predominantly hornblende gneiss). This portion of the mafic complex consists of variably metamorphosed interlayered rocks that originally ranged from pyroxenite to anorthosite but were dominantly gabbro and leucogabbro. Most of these rocks underwent regional …
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Bedrock and surficial geology of the southern half of the Montezuma 7.5' quadrangle, central Colorado Front Range, Colorado, USA
… area are Paleoproterozoic biotite-sillimanite gneiss/schist, biotite-quartz gneiss/schist, and hornblende gneiss. These are intruded by Mesoproterozoic granitoid plutonic rocks and local satellite intrusions related to the ~39.7 Ga Montezuma stock. The Paleoproterozoic rocks are deformed by …
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Investigation of the Geology, Structural Setting and Mineralisation the Copper-Sulphide Deposits in the Messina Area, Limpopo Mobile Belt, South Africa
… granulite, amphibolite, quartzite, hornblende gneiss, quartzo-feldspathic gneiss, potassium-feldspathic gneiss and cal-silicate gneiss. These rocks were subjected to hydrothermal alteration during ore mineralisation within the area. It was further noted that epidote alteration was …