Abstract:

Basin’s tectonic evolution-fluid system-mineraIizatbn is a new frontier of ore deposits. The characteristlc of basin’s evolution affects the structure of the sedimentary formation directly. Structures of the formations and the character of geochemistry played a crucial role in the forming of thermal field of compaction fluid system, dynamic field and geochemical field and mineralization. Yuebei Late Paleozoic sedimentary basin was mainly made up of coarse clastics with high permeabmty, and the thicknesses of carbonate and the sedlmentary formation were thin. Numerical simulation demonstrated that basin’s
compaction fluid system cann’t form upper terrestrial heat store and upper fluid potentials，the ore-bearing fluid can onIy be stored in special parts of the sedimentrary layers to form Hongyan low temperature pyrite deposit．Bainiuchang Early Paleozoic sedimentary basin is a typical rift. The fluid from several thousands of meters of black shale and its upper carbonate and sandstone formations constituted compaction fluid system which concentrated the metalIogenic elements and formed the Bainiuchang super-large silver-polymetallic deposit．

Key words: basin evolution, formation’s character, basin compaction fluid, mineralization, the Nanling area