In the Anhui segment of the Lower Yangtze metallogenic belt are distributed not only a great number of contact metasomatic and superimposed and composite skarn deposits, but also some magmatic skarn deposits. Based on emplacement location of skarn magma, magmatic skarn can be divided into in-situ skarn and external skarn, and magmatic skarn deposit correspondingly into in-situ skarn deposit and external skarn deposit. Characteristics are evidently different between the two skarns and associated deposits. A comprehensive analysis is consistent with formation of the in-situ and external skarns by cooling and crystallization of the in situ and external skarn magmas, and supports formation of deposits associated with the in-situ and external skarns by cooling and crystallization of the ore pulp formed through liquation of the skarn magmas and by alteration and replacement of the hydrothermal solution formed through crystalline differentiation of the skarn magmas.
