This monograph, which is to represent, in part, a guidebook for a field excursion in northern Xinjiang from August 9-21, 2003, is sponsored jointly by the IGCP-473 Project "GIS Metallogeny of Central Asia", China Geological Survey, China University of Geosciences (Beijing, CUGB), National Natural Science Foundation of China (NSFC), Chinese National Research Project (305) for Mineral Resources, The Society of Economic Geologists (SEG), The Society for Geology Applied to Mineral Deposits (SGA), The International Association on the Genesis of Ore Deposits (IAGOD), the Center for Russian and Central Asian Mineral Studies (CERCAMS, Department of Mineralogy, Natural History Museum London) and the USGS. The volume presents 16 invited papers, which systematically introduce the regional distribution of base, precious, and rare metal deposits that are representative of the metallogeny of this part of the oro-gen, to an overseas non-Chinese readership for the first time. The papers reflect the current status of research on northern Xinjiang ore deposits and allow for an improved understanding of the regional geology and metallogeny of this part of the Altaid orogen.The monograph is designed for specialists in regional geology, geodynamics, metallogeny, ore deposits modeling and economic geology as a reference book on tectonic evolution and metallogeny of the Chinese Altay and Tianshan.