The Heart occurrence is located at an elevation of approximately800 metres on a south facing slope in the northern head waters of the Power River.

The region is underlain mainly by volcanics and crystalline rocks and minor sediments. Overlying an assemblage of Paleozoic Sicker Group sediments and Upper Triassic basalts and minor carbonate and clastic sediments of the Vancouver Group is the Lower Jurassic Bonanza Group of andesitic to rhyodacitic lava, tuff and breccia. Bonanza volcanism is coeval with, or genetically related to, Jurassic Island Plutonic Suite granodiorite that has invaded all older rocks, and in this area occurs as small isolated stocks.

Pyrite and chalcopyrite veinlets and shears occur within Bonanza Group pyroclastics and andesite which are intruded by a small body of granodiorite to diorite. Magnetite bearing veins are also present.

The area was originally staked in the early 1960s by Riocanex Ltd. During 1963 and 1964, Riocanex conducted geochemical sampling, limited geological and self-potenial surveys and drilling exploration. The claims were allowed to lapse and were staked in 1969 by Vanco Explorations Ltd. Vanco conducted geological, geochemical and ground magnetometer surveys over the "Lois" stock and the surrounding area. In addition, about 16 kilometres of induced polarization survey were run over the northern portion of the stock. In the mid-1970s, under a joint venture between Vanco and Esso Minerals, limited mapping and the drilling of a single 214-metre deep diamond-drill hole were executed. The property was subsequently dropped. In 1984, Brinco Mining Ltd. optioned the property from Jim McDonald as part of a larger property extending north, south and east (see Iron Cap (MINFILE 092L 228) and Fang (MINFILE 092L 265)). The company conducted detailed geological mapping near Hart Lake on the Bozo 4 claim and reconnaissance mapping on the eastern portion of the claim. Gold Leaf Ventures optioned the property from Jim McDonald and during the 1988 and 1990 field season laid out a new grid in the Northwest portion of the Bozo claim, collected 663 soil samples and conducted 20 kilometres of ground magnetometer and VLF-EM surveys. During 2010 through 2012, Compliance Energy completed programs of geological mapping and rock, soil and silt sampling and 470 kilometres of airborne magnetic, electromagnetic and radiometric geophysical surveys on the area as the Nic Property.