sentences:  The Widgiemooltha Komatiite is an important host for Kambalda type komatiitic nickel ore deposits.Nickel ore has been found at several locations around the Widgiemooltha Dome and has been mined from six locations, with four underground mines in operation as of 2007 and a proposed open cut mine for mid-2007.Further exceptionally high-grade gold mineralisation is present at Wattle Dam, to 6 kg (200 Oz) to the ton, within the Widgiemooltha Komatiite.