Abstract
Ningwu porphyrite-type iron deposits are located in Ningwu Mesozoic volcanic basin, which belongs to the middle and lower reaches of the Yangtze River metallogenic province. The volcanic rocks can be divided into Longwangshan, Dawangshan, Gushan and Niangniangshan Formations from early to late. All these volcanic rocks are rich in alkali, and show the similar patterns in rare earth element (REE) distribution. However, some differences can be found in the trace elements and REE patterns. The study of petrology and REE geochemical characteristics shows that these rocks are derived from the underplating of the lithospheric mantle and are contaminated by crustal materials, undergo AFC process during the magmatic evolution.
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