syngenetic การใช้

• Mineral associations may vary ( 1 ) in different mineralized structures, either syngenetic ( namely, passive precipitation in chimneys, mounds and stratiform deposits ) or epigenetic ( structures that correspond to feeder channels, and replacements of host rocks or pre-existing massive sulfide bodies ), or " structural zonation ", ( 2 ) from proximal to distal associations with respect to venting areas within the same " stratigraphic horizon ", or horizontal zonation, ( 3 ) from deep to shallow associations ( " i . e . ", stockworks to mounds ), or " vertical zonation ", ( 4 ) from early and climactic to late stages of mineralization ( dominated by sulfides, and sulfates or oxides, respectively ), or " temporal zonation ", and ( 5 ) in various volcano sedimentary contexts, depending essentially on the composition of volcanic rocks and, ultimately, on the tectonomagmatic context.