The REE and trace element analyses were conducted on 17 samples from the ores and
wall rocks of the Bojitian gold deposit (Table 7).
To joint with
wall rock made of nonuniformly distributed fine grains or coarse grains or joint with discontinuous and nonuniform stress propagation during the course of formation, its microcosmic roughness is always rough.
In addition, the fabric in the
wall rock records peak metamorphic conditions of ca.
Zheng, "Calculation discussion about safety factor of unlined loess tunnel
wall rock structure under earthquake," Rock and Soil Mechanics, vol.
Three fundamental properties influence the rate at which arc magma ascends: i) magma is less dense than the
wall rocks and is, therefore, buoyant, ii) a magma with lower viscosity rises with greater ease than a more viscous magma (therefore, mafic magma generally rises more readily than felsic magma, which is likely to be trapped in magma chambers where it cools to form a pluton), and iii) magma rises more rapidly in an extensional environment than in a compressional setting because widening fractures create space for rising magma to exploit.
Early-stage white muscovite and fluorite (commonly looks orange on mine walls, but is actually light green when removed and cleaned) contain pyrite; these minerals grade from
wall rock replacement into open-space filling along vein walls.
Drill collars were located outside of the breccia pipe within the
wall rock that hosts the breccia.
These experiments aim to help people understand the processes involved when crustal rocks are melted by hot magma coming from deeper within the earth, as well as how crystals in a boundary layer influence melt rates of the
wall rock and nature of mixing of the melt with the warm environment.
The hanging
wall rock to a depth of approximately 3 m is intensely jointed having a fracture frequency greater than 4 per metre.