Gold production totalling 13 kilograms is recorded for Delure Creek (also known as Deloire Creek), which flows north into Thibert Creek, located about 3 kilometres west of the north end of Dease Lake. Most production came prior to 1910 but some work also occurred up to about 1940.

The creek drains an area underlain by greywacke, slate, chert and undivided sediments and volcanics of the Mississippian-Triassic Kedahda Formation (Cache Creek Complex). Locally, upper Mississippian-Permian Cache Creek Complex serpentinite, peridotite and pyroxenite occur. A narrow, deep rock canyon extends for approximately 1066 metres up from the mouth of the creek. Above the upper end of the canyon the valley widens with a low gradient for about 1600 metres, where another rock canyon begins. In this part of the flat area the cover is 6 to possibly 12 metres deep. A buried channel of the creek probably extends from the lower end of the wide, flat part of the creek, through to the valley of Thibert Creek. The channel is filled with glacial drift to a maximum depth of about 60 metres (Geological Survey of Canada Summary Report 1925 Part A, page 68A).

Some mining was done on the creek in the early days and several shafts were sunk to mine the ground in the flat area above the canyon, but without much success. Several tunnels were driven into the south bank of Thibert Creek to try to find the outlet of the buried channel into Thibert Creek valley.

In 2000, Netseers Internet Corp. attempted to find the source of the Thibert Creek placers and possibly the Keystone showing (104J 012). The company completed detailed mapping and sampling of the placer workings at Delure Creek, Five Mile Gulch, Boulder Creek (104J 054) and Berry Creek (104J 007) with the attempt to locate possible sources of gold mineralization within the workings. A total of 90 soil samples were taken in a total of eleven lines which were intended to bracket the areas of the workings and locate possible sources of mineralization.