host rock

host rock

[′hōst ‚räk]
(geology)
Rock which serves as a host for other rocks or for mineral deposits.
References in periodicals archive ?
While gold veins have been discovered primarily in quartz rock, Lambert says some gold has precipitated right into the host rock (greenstone) along the M Zone itself, with high grade values.
Northing Easting Description Au g/t R120803 1590220 713640 Silicified Host rock rich in pyrite 5.
This is followed by a segment highlighting PGE mineralization concentrated as a result of the physicochemical interaction of intrusive rocks and host rock.
There were also positive results from the host rock (or lateral zone), with samples returning grades of 1.
Kimberlite is a host rock to diamonds, but not a source rock: Kimberlite indicator minerals consist of pyrope and eclogitic garnets, magnesian ilmenite, chromite, chorine diopside, forsteritic olivine and diamond and the presence of these minerals is used to determine the proximity of diamond-bearing kimberlites.
Initially, it was interpreted as epithermal gold deposit but during the analysis, it was noticed that the quartz veins are still within the joints and beds of the host rock which means it is part of placer gold deposit.
This project has excellent exposure with little overburden, allowing close inspection of the vein systems in the host rock.
Several anomalies which show coincident calc-silicate minerals (the host rock for the El Capitan deposit) and iron oxide minerals (the El Capitan mineralization occurs with iron oxide minerals) have been located.
82 square kilometres): Porphyry gold and copper mineralization occur in a quartz monzonite host rock, which is locally brecciated and intruded with quartz stockwork veinlets.
Copper mineralization consists of Chalcocite, Bornite and Calcite in an Andesitic and Basaltic host rock.
Contract notice: Providing a host rocks operational command post.
The presence of multi-gram gold values within host rocks, in addition to visible gold we found in the high grade vein structures is really encouraging.