Mineral characteristics and associated mineralization of weathering crust from ankroet complex (K2ak) at Mat camp, Da Lat

Section of weathering crust developed on the biotite granite (ankroet complex), distributed on high leveling surfaces 1400–1700 m of Miocene age (N1) at Trai Mat area and around Da Lat city. In terms of petrographic characteristics, this weathered shell section is full of zones: laterite, litoma, saprolite, and the original stone. On chemical-mineral characteristics: The results of synchronous processing of the results of chemical, thermal and jealous analysis ... on vertical sections shows, they belong to the form of fealsit formation (FeAlSi) with 4 types of shells: Fealsit / goethite-kaolinite-gibsit (FeAlSi / gt-kl-gb / N1), AlSiferit / (kaolinite-hydromica) -gibsit-goethit (AlSiFe / (kl-hmi) -gb-gt / N1), Sialit (actually receptors) / kaolinite-hydromica (SiAl / kl-hmi / N1) and Sialit (alkaline) / kaolinite rock-forming minerals (SiAl / kvtđ-kl / N1-Q). About microelements: concentrate in VPH compared to original stone: Cu: 1.8 – 3.3 times, Pb: 1 – 2 times, Mo: 0 – 2.83 times, most other elements were removed from the shell. Related minerals: Camp Mat, Da Lat Kaolin can be used as raw material for producing white bone tiles and birth materials. In this weathered shell section, there is a weathered shell of AlSiferite / (kaolinite-hydromica) -gibsit-goethite (AlSiFe / (kl-hmi) -gb-gt) which is a weathered clay-rich weathering product (gibsit up to 30 - 40%), developing on biotite granite at Mat camp - Da Lat area is often seen only in basalt weathering crust which is very rare in granite.