Geological characteristics of 2011 Japan tsunami sediments deposited along the coast of southwestern Mexico

作者：Roy Priyadarsi D^*; Jonathan M P; Consuelo Macias Ma; Sanchez Jose Luis; Lozano Rufino; Srinivasalu S

来源：Geochemistry, 2012, 72(1): 91-95.

DOI：10.1016/j.chemer.2012.02.003

• 11th March 2011 tsunami
• Tsunami sediment vs. pre-tsunami deposit
• Heavy mineral association
• Bromine
• Geochemistry
• Southwest Mexico

The tsunami of 11th March 2011 was originated at the east coast of Japan and deposited ca. 1 cm thick sediment layer along the coast of southwestern Mexico up to a maximum distance of 320 m from the beach. The sedimentological, mineralogical and geochemical characteristics of the sediments deposited during the tsunami UT) are compared with the pre-tsunami sediments (PRT). if sediments consist of dominant coarser fractions (%26gt;54% of medium to coarse sand), whereas PRT deposits comprise abundant finer fractions (%26gt;58% of fine sand). Assemblage of mafic and heavy minerals suggests similar provenance for both. The higher abundance and variation of heavy minerals along with higher concentrations of bromine (Br) and sodium (Na) in the JT deposits reveal the influence of high energy sea waves in transportation of heavy mineral rich coarse sediments onto the coastal lowlands.

• 出版日期2012