Morphogenetic features of garnets from Dyukunakh placer (Yakutian diamondiferous province)

DOI: 10.47765/0869-5997-2021-10007

Abstract

Morphological features of garnets from the Upper Paleozoic Dyukunakh placer were studied and the conditions of their morphogenesis were interpreted. As a result of the morphogenetic analysis, it was found that garnets have evolved in exogenous conditions, including extreme wear in coastal marine conditions and repeated redeposition. In addition, garnets underwent significant hypergene corrosion in the residual soil and subsequent dissolution under metasomatic conditions. As a result of such exogenous evolution, no trace of their primary morphological characters associated with the deep stage of
morphogenesis remained on garnets. For this reason, it is impossible to quantify the degree of primary sources removal.