Basin Fluid Mineralization during Multistage Evolution of the Lanping Sedimentary Basin, Southwestern China

Abstract

The Lanping sedimentary basin has experienced a five-stage evolution since the late Paleozoic: ocean-continent transformation (late Paleozoic to early mid-Triassic); intracontinental rift basin (late mid-Triassic to early Jurassic); down-warped basin (middle to late Jurassic); foreland basin (Cretaceous); and strike-slip basin (Cenozoic). Three major genetic types of Ag-Cu polymetallic ore deposits, including the reworked hydrothermal sedimentary, sedimentary-hydrothermally reworked and hydrothermal vein types, are considered to be the products of basin fluid activity at specific sedimentary-tectonic evolutionary stages. Tectonic differences of the different evolutionary stages resulted in considerable discrepancy in the mechanisms of formation-transportation, migration direction and emplacement processes of the basin fluids, thus causing differences in mineralization styles as well as in genetic types of ore deposit.

“Water Consumption” in the Diagenetic Stage and Its Petroleum Geological Significance

“…E-maiI: dkyzsw8 slof.com carbonate, clay mineral, etc. ), hydropower and their relationship with reservoir formation (Zheng and Pang, 1989;Gu et al, 2007;Mclellan et al ., 1995;Huang et al, 1997;Knut, 1998;Stefan, 1999;Zhao et al, 1999;Cheng, 2003;Dai et al, 2003;Margitai, 2004;Ebongue et al. 2005;Mostron et al, 2005).…”