This book is the source of "PETROGENESIS OF TIN BEARING GRANITOIDS OF KATEKALYAN AREA OF BASTAR, CENTRAL INDIA" Favorable geological setting, nature of plutons, and composition of host rocks, are the most significant tools to assess the degree of ore potential and also, to know the genetic history of the granitic rocks of the study area.The alteration zones of the study area are very narrow. The apical zones of tin-bearing granitoids are sites of intense and complex metasomatic activity with the transportation of tin ions leading to the formation of discrete crystals of cassiterite. Source of the alteration solutions is highly debated.