Trace element analysis of clasts and matrix in sedimentary and volcaniclastic breccias at site 786

Abstract:

Recognizes at least four types of breccias: flow-top breccias, associated with cooling and breakup on the upper surface of laval flows; aubtobreccias, formed by in-situ alteration at the base of flows; fault-gouge breccias; and true sedimentary breccias derived from weathering and erosion of underlying flows. Trace element analysis of bulk samples from clasts and matrix material in individual breccia units was undertaken: 1) to help distinguish between sedimentary and volcanic breccias, 2) to determine the degree of mixing and depth of erosion in sedimentary breccias, and 3) to analyze the local provenance of the individual breccia components (matrix and clasts). -from Author

Año de publicación:

1992

Keywords:

Fuente:

scopus