Precambrian orogens and their hypozonal orogenic gold ores

J. Kolb; A. Dziggel; L. Bagas

Resumé

High-temperature (hypozonal) orogenic gold deposits formed at conditions of 500 − 700ºC and 2-7 kbar in syn- to post-peak metamorphic shear zones, and appear to be restricted to the Precambrian. Their formation occurred between ca. 3030 Ma (New Consort, South Africa) and ca. 550 Ma (Navachab, Namibia), at an apparent geothermal gradient of 40−80◦C/km, which is similar to mesozonal orogenic gold deposits. The PT conditions of orogenic gold formation define a linear trend resembling terrane exhumation, largely below the granite wet solidus and in the 1-phase stability field for aqueous-carbonic ore fluid compositions (Kolb et al., 2015).

Originalsprog	Engelsk
Sider (fra-til)	124
Antal sider	1
Tidsskrift	Bulletin of the Geological Society of Finland
Vol/bind	Special Volume
Status	Udgivet - 2016
Begivenhed	32nd Nordic Geological Winter Meeting - Helsinki, Finland Varighed: 13 jan. 2016 → 15 jan. 2016 Konferencens nummer: 32

Programområde

Programområde 4: Mineralske råstoffer

Adgang til dokumentet

https://www.geologinenseura.fi/sites/geologinenseura.fi/files/bgsf-ngwm2016_abstract_volume.pdfLicens: Ikke-specificeret

Citationsformater

@article{f27d3da3c53c4aa79ba685cbf23d90a9,

title = "Precambrian orogens and their hypozonal orogenic gold ores",

abstract = "High-temperature (hypozonal) orogenic gold deposits formed at conditions of 500 − 700ºC and 2-7 kbar in syn- to post-peak metamorphic shear zones, and appear to be restricted to the Precambrian. Their formation occurred between ca. 3030 Ma (New Consort, South Africa) and ca. 550 Ma (Navachab, Namibia), at an apparent geothermal gradient of 40−80◦C/km, which is similar to mesozonal orogenic gold deposits. The PT conditions of orogenic gold formation define a linear trend resembling terrane exhumation, largely below the granite wet solidus and in the 1-phase stability field for aqueous-carbonic ore fluid compositions (Kolb et al., 2015).",

author = "J. Kolb and A. Dziggel and L. Bagas",

year = "2016",

language = "English",

volume = "Special Volume",

pages = "124",

journal = "Bulletin of the Geological Society of Finland",

issn = "0367-5211",

publisher = "Geological Society of Finland",

note = "32nd Nordic Geological Winter Meeting ; Conference date: 13-01-2016 Through 15-01-2016",

}

TY - JOUR

T1 - Precambrian orogens and their hypozonal orogenic gold ores

AU - Kolb, J.

AU - Dziggel, A.

AU - Bagas, L.

N1 - Conference code: 32

PY - 2016

Y1 - 2016

N2 - High-temperature (hypozonal) orogenic gold deposits formed at conditions of 500 − 700ºC and 2-7 kbar in syn- to post-peak metamorphic shear zones, and appear to be restricted to the Precambrian. Their formation occurred between ca. 3030 Ma (New Consort, South Africa) and ca. 550 Ma (Navachab, Namibia), at an apparent geothermal gradient of 40−80◦C/km, which is similar to mesozonal orogenic gold deposits. The PT conditions of orogenic gold formation define a linear trend resembling terrane exhumation, largely below the granite wet solidus and in the 1-phase stability field for aqueous-carbonic ore fluid compositions (Kolb et al., 2015).

AB - High-temperature (hypozonal) orogenic gold deposits formed at conditions of 500 − 700ºC and 2-7 kbar in syn- to post-peak metamorphic shear zones, and appear to be restricted to the Precambrian. Their formation occurred between ca. 3030 Ma (New Consort, South Africa) and ca. 550 Ma (Navachab, Namibia), at an apparent geothermal gradient of 40−80◦C/km, which is similar to mesozonal orogenic gold deposits. The PT conditions of orogenic gold formation define a linear trend resembling terrane exhumation, largely below the granite wet solidus and in the 1-phase stability field for aqueous-carbonic ore fluid compositions (Kolb et al., 2015).

M3 - Abstract in journal

SN - 0367-5211

VL - Special Volume

SP - 124

JO - Bulletin of the Geological Society of Finland

JF - Bulletin of the Geological Society of Finland

T2 - 32nd Nordic Geological Winter Meeting

Y2 - 13 January 2016 through 15 January 2016

ER -

Precambrian orogens and their hypozonal orogenic gold ores

Resumé

Programområde

Adgang til dokumentet

Fingeraftryk

Citationsformater