The first data on the zoned distribution of fluid inclusions in the ore-forming system of the Peschanka gold-copper porphyry deposit (Northeast Russia)

Characteristics of Some Gold-Copper Deposits Associated with Potassic Igneous Rocks

“…The main structural trend is oriented northwest-southeast Welsh (1975), Wood and Holliday (1995), Holliday et al (1999, 2002), Harper (2000, Tedder et al (2001), Blevin (2002, Wilson et al (2003Wilson et al ( , 2007 Walthier et al (1985), Siddeley and Araneda (1986), Jannas et al (1990), Bissig et al (2001Bissig et al ( , 2002Bissig et al ( , 2003 Volchkov et al (1982), Maraeva et al (1988), Sidorov and Eremin (1994), Volkov et al (2006), Seltmann et al (2010), Chitalin et al (2012), Baksheev et al (2010, 2013, Marushchenko (2013), Marushchenko et al (2015), Nagornaya (2010), Nikolaev et al (2013Nikol...…”

Direct Associations Between Potassic Igneous Rocks and Gold-Copper Deposits in Volcanic Arcs

“…Heithersay and Walshe 1995;Holliday et al 2002). The Peschanka deposit is intersected by a series of dykes, including preand post-mineral lamprophyres (Volchkov et al 1982;Maraeva et al 1988), and post-mineral andesite porphyries (Nikolaev et al 2014). …”

“…Unfortunately, no trace element compositions of the rocks have been published to date. However, high volatile contents of the intrusions are indicated by the presence of high-salinity fluid inclusions in quartz veins and fluorite veins in different parts of the deposit Nikolaev et al 2014). Abundant primary magnetite contents of the monzonites and quartz-monzonites, as well as numerous gypsum and anhydrite veins, are suggestive of high oxygen fugacities of the melts (Volkov et at.…”

“…The stockwork veins are conformal to the quartz-monzonite porphyry phases that merge together at depth, but also extends for tens to, locally, several hundred meters into the surrounding country rocks of the Egdygkych pluton (Baksheev et al 2012;Soloviev 2014). Deep exploration drilling defines a north-south oriented, elongated stockwork zone of about 7000 m by 1500 m in size and economic mineralization extends to a vertical depth of >700 m Nikolaev et al 2014). The quartz stockwork zone extends almost continuously from the south to the north, and the deposit was formed by hydraulic fracturing in the stress field of near-horizontal latitudinal extension .…”

“…The Peschanka deposit forms part of the Baimka ore district that is confined to the eastern margin of the large Egdygkych pluton, a composite mafic intrusion of early Cretaceous age Nikolaev et al 2014;Soloviev 2014). The mineral potential of the Baimka district was discovered during large regional stream sediment and soil sampling surveys in the nineteen seventies and early-eighties (Nokleberg et al 2005;Chitalin et al 2012).…”