detectorist
n.β Β«Just because youβve got a metal detector doesnβt entitle you to charge unbidden onto other peopleβs property, Alan cautions. Detectorists must obtain permission to go onto private turf and must register with public lands, state, county and town officials prior to going on those pieces of real estate, too.Β» ββClub members keep digging for buried treasures” by Valerie Zehl Press & Sun-Bulletin (Binghampton, New York) Dec. 18, 2008. (source: Double-Tongued Dictionary)