Spatial-temporal heterogeneity of magma emplacement process and its constraints on localization of associated orebody: A case study in the Shizishan orefield of the Tongling Ore Cluster, east China

We present a study on the Dongguashan quartz diorite stock which is largest Early Cretaceous intrusion associated with skarn-porphyry polymetallic ore deposit in Tongling Ore Cluster, Middle-Lower Yangtze Metallogenic Belt East China. The show massive texture without obvious foliation, and intrusive contact was locally observed inside of stock. anisotropy magnetic susceptibility (AMS) results two distinct groups. Group I (G-I) dominated by NE-SW-striking foliation variably oriented lineation. II (G-II) that intruded into G-I characterized steep NW-SE-striking lineation, are parallel to vein-like orebody developed 3D geometrical modelling displays triangular shape plan-view an eastward bulge irregular boundary eastern side surface steeper west than east, denoting constructed magma accretion trend. Furthermore, has wide range composition geochronological data, suggesting multiple pulses emplacement model. Accordingly, we propose at least stages pulses. earlier stage along pre-emplacement structures country rock partly lithological mechanical discontinuous interfaces yielded stratabound skarn orebody. produced highly deformed longer heated stock, favoring development stock-country interface. late-stage pulse parallelism among trend G-II, extensional structure suggest vein-type orebodies may controlled both regional tectonics.