Goa's sand for export abroad?

Today 25/04/2017 morning at 9.55 am a barge named "CHERYLYNE MRH 681" was sighted in Mandovi river near Ribandar, Tiswadi, Goa loaded with sand. Destination of barge is not known but proceeded towards Mormugao Port Trust (MPT). Is Goa's sand is being sold and transported in large quantities in barges? from this sand was extracted? Do Captain of Ports and department of mines has any answers? Who owns this barge? Some pictures for you in this posting.