Biotite is a common ferromagnesian mica occurring in igneous and metamorphic rocks. Its iron–magnesium composition varies with pressure–temperature conditions, making it an important index mineral for assessing metamorphic grade and in deciphering tectono-thermal evolution of the continental crust. #GeologicalSurveyofIndia #MineraloftheWeek #Biotite #Mica #GeoPedia #Geologykefunde | Geological Survey of India
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CHALLION CREW HITS A MAJOR LITHIUM INTERCEPTION! Out here in the field, the rocks are finally speaking and the story is lithium. Our Challion Core Drilling Team has been making a significant interception at lithium-bearing pegmatite vein right within the biotite, muscovite gneiss host sequence. Depth of Hit: Begins at ~20 m Thickness: A solid ~3 m of clean, promising pegmatite Host Rock: Biotite gneiss and muscovite gneiss ,classic indicators of a fertile basement complex Potential: High-grade p
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