Details at this time are unclear as to what exactly caused an enormous glacier collapse on the Andean mountain of Salkantay in Peru. Satellite images should solve the mystery of how the collapse started.
There was a similar example of glacial collapse ice in 2016 in the Himalayas of Tibet but, it involved the collapse of two separate glaciers.
( O/T At the Chinese border with Tibet in the Himalayas, thousands of unknown pathogens were recently discovered. )