Developing a new biomineral proxy for freshwater environments in Northwest Patagonia

SOLDATI, ANALIA L.; JACOB, DORRIT E.

Brussels

Workshop; Workshop Bivalve Biomineralization: Archival potential and proxy incorporation; 2009

The Royal Flemish Academy of Belgium and CALMARSII network

Because of their long live span of ca. 100 years, Diplodon shells from freshwater lakes and streams may be useful to construct an accurate climatological biomineral archive for Patagonia with time windows of around a century, resolving the environmental signal annually and even seasonally. In this work d18Oshell values obtained by micro-milling at high spatial resolution in the growth increments of three recent Diplodon chilensis patagonicus shells from Lake El Trébol (42ºS-71ºW, Patagonia Argentina) were used to construct a high temporally resolved master d18Oshell chronology.