This depth is very important because it is approximately where the graphitic phyllite
The gold-bearing system is hosted within a package of likely Cambrian-age sediments, including greywackes with minor quartz-arenites (phyllite
, schist and quartzites), within the Appalachian orogenic belt.
The foliation is the most important structure developed in this stage (Sarkarinejad et al., 2010; Sheikholeslami, 2015) The deformed Precambrian unit consists of schist, phyllite
, and slate, exposed extensively in the east and south-east of the study area.
Permian metamorphic clastic rocks comprise metasandstone, slate and phyllite
, which discordantly overlie the Cambrian strata.
Rests on ancient marine sediments (claystones) and/or metamorphic rocks of phyllite
The basin is bounded by magmatic and metamorphic rocks, predominantly granite, gneiss, mica schist and phyllite
. Thus, sediments in the basin mainly consist of debris of these rocks (Flechsig et al.
Yin, "Deformation and failure mechanism of phyllite
under the effects of THM coupling and unloading," Journal of Mountain Science, vol.
The ore-body is chiefly composed of hematite and its surrounding rock mainly consists of dolomite, phyllite
, and quartz-schist.
 found that the permeability of phyllite
and cracked sandstone decreased with increasing temperature within a limited scope, but increased when temperature exceeded a certain value.
Highlights here include a phyllite
carving of Shiva and Parvati dating to the late Pala dynasty (c.
The primal geologic formation about Longmenshan tunnel is shale, phyllite
, dolomite rock, and limestone at test sections of XJ3K1 + 525 to XJ3K1 + 325.
The Triassic sediment is a conglomerate of interbedded sandstone, siltstone, and shale while the Permian counterpart contains phyllite
, slate, and shale with subordinate sandstone and schist.