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Metallogeny of the Lesser Caucasus: From arc construction to post-collision evolution

English title Metallogeny of the Lesser Caucasus: From arc construction to post-collision evolution
Applicant Moritz Robert
Number 168996
Funding scheme Project funding
Research institution Département des sciences de la Terre Université de Genève
Institution of higher education University of Geneva - GE
Main discipline Other disciplines of Earth Sciences
Start/End 01.11.2016 - 31.10.2019
Approved amount 425'614.00
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All Disciplines (5)

Discipline
Other disciplines of Earth Sciences
Geochronology
Mineralogy
Geology
Geochemistry

Keywords (9)

Tectono-magmatic setting; Ore deposits; Lesser Caucasus; Magmatic rocks; Tectonics; Geodynamics; Tethys belt; Porphyry Cu-Mo deposits; Epithermal deposits

Lay Summary (French)

Lead
Métallogénie du Petit-Caucase: depuis la construction d’un arc magmatique à une évolution post-collisionIntroduction Le contexte géodynamique et métallogénique du Petit-Caucase reste peu connu. Toutes les étapes de l’évolution d’une chaîne de montagne sont conservées, depuis la formation d’un arc magmatique aux étapes de destruction d’une chaîne de montagne, et peuvent être étudiées de manière indépendante, y compris les différents types de gisements métallifères du Jurassique au Cénozoïque.
Lay summary

Contenu et objectifs

 Trois thèmes principaux seront abordés: (i) l’évolution magmatique, tectonique et métallogénique cénozoïque de l’extrême sud du Petit-Caucase, (ii) la distinction des contextes tectoniques de subduction éocène et post-collision néogène des districts minéralisés le long de la zone de collision entre l’Eurasie et des microplaques d’origine gondwanienne, et (iii) la compréhension l’ensemble de l’évolution métallogénique et géodynamique du Jurassique au Cénozoïque le long de deux traverses représentatives au travers du Petit-Caucase.

 

Contexte scientifique et social

La recherche présentée dans ce projet de recherche permettra de contribuer à différents domaines, y compris tectonique, magmatisme, géochronologie, évolution de la croûte terrestre et formation de gisements métallifères. Ce projet permettra de mieux comprendre le lien géodynamique et métallogénique du Petit-Caucase avec les Anatolides et les chaînes iraniennes. Cette étude permettra de développer des notions utiles aux compagnies d’exploration minière pour découvrir de nouvelles ressources naturelles nécessaires au développement durable de notre société.

 

Mots-clé

Gisements métallifères, géodynamique, roches magmatiques, Petit-Caucase, Téthys, tectonique, porphyres Cu-Mo, épithermaux
Direct link to Lay Summary Last update: 03.10.2016

Responsible applicant and co-applicants

Employees

Publications

Publication
Cenozoic Strike-Slip Tectonics and Structural Controls of Porphyry Cu-Mo and Epithermal Deposits During Geodynamic Evolution of the Southernmost Lesser Caucasus, Tethyan Metallogenic Belt
Hovakimyan Samvel, Moritz Robert, Tayan Rodrik, Melkonyan Rafael, Harutyunyan Marianna (2019), Cenozoic Strike-Slip Tectonics and Structural Controls of Porphyry Cu-Mo and Epithermal Deposits During Geodynamic Evolution of the Southernmost Lesser Caucasus, Tethyan Metallogenic Belt, in Economic Geology, 114(7), 1301-1337.
Metallogeny of the Tethyan Orogenic Belt: From Mesozoic Magmatic Arcs to Cenozoic Back-Arc and Postcollisional Settings in Southeast Europe, Anatolia, and the Lesser Caucasus: An Introduction
Moritz Robert, Baker Timothy (2019), Metallogeny of the Tethyan Orogenic Belt: From Mesozoic Magmatic Arcs to Cenozoic Back-Arc and Postcollisional Settings in Southeast Europe, Anatolia, and the Lesser Caucasus: An Introduction, in Economic Geology, 114(7), 1227-1235.
Multiple Porphyry Cu-Mo Events in the Eastern Pontides Metallogenic Belt, Turkey: From Early Cretaceous Subduction to Eocene Postcollision Evolution
Delibaş Okan, Moritz Robert, Selby David, Göç Deniz, Revan Mustafa Kemal (2019), Multiple Porphyry Cu-Mo Events in the Eastern Pontides Metallogenic Belt, Turkey: From Early Cretaceous Subduction to Eocene Postcollision Evolution, in Economic Geology, 114(7), 1285-1300.
Ore Formation During Jurassic Subduction of the Tethys Along the Eurasian Margin: Constraints from the Kapan District, Lesser Caucasus, Southern Armenia
Mederer Johannes, Moritz Robert, Chiaradia Massimo, Spikings Richard, Spangenberg Jorge E., Selby David (2019), Ore Formation During Jurassic Subduction of the Tethys Along the Eurasian Margin: Constraints from the Kapan District, Lesser Caucasus, Southern Armenia, in Economic Geology, 114(7), 1251-1284.
Zircon Petrochronology of the Meghri-Ordubad Pluton, Lesser Caucasus: Fingerprinting Igneous Processes and Implications for the Exploration of Porphyry Cu-Mo Deposits
Rezeau Hervé, Moritz Robert, Wotzlaw Jörn-Frederik, Hovakimyan Samvel, Tayan Rodrik (2019), Zircon Petrochronology of the Meghri-Ordubad Pluton, Lesser Caucasus: Fingerprinting Igneous Processes and Implications for the Exploration of Porphyry Cu-Mo Deposits, in Economic Geology, 114(7), 1365-1388.
Jurassic ore-forming systems during the Tethyan orogeny: constraints from the Shamlugh deposit, Alaverdi district, Armenia, Lesser Caucasus
Calder M. F., Moritz R., Ulyanov A., Chiaradia M., Spangenberg J. E., Melkonyan R. L. (2019), Jurassic ore-forming systems during the Tethyan orogeny: constraints from the Shamlugh deposit, Alaverdi district, Armenia, Lesser Caucasus, in Mineralium Deposita, 54(7), 1011-1032.
Cenozoic porphyry and epithermal systems in the South Armenian Block, Lesser Caucasus, Armenia: new temporal geochemical and petrogenetic constraints
GrosjeanMarion, MoritzRobert, HovakimyanSamvel, ChiaradiaMassimo, SpikingsRichard, RezeauHervé, UlyanovAlexey, SpangenbergJorge, MelkonyanRafael (2019), Cenozoic porphyry and epithermal systems in the South Armenian Block, Lesser Caucasus, Armenia: new temporal geochemical and petrogenetic constraints, in Proceedings of the 15th SGA Biennial Meeting., Glasgow, Glasgow, Scotland.
Geological setting and lithological controls of breccia-hosted Cu-Au ore at the Late Cretaceous Kvemo Bolnisi prospect, Bolnisi, Lesser Caucasus, Georgia
PopkhadzeNino, MoritzRobert (2019), Geological setting and lithological controls of breccia-hosted Cu-Au ore at the Late Cretaceous Kvemo Bolnisi prospect, Bolnisi, Lesser Caucasus, Georgia, in Proceedings of the 15th SGA Biennial Meet, Glasgow, Glasgow, Scotland.
Structural control and tectonic environment of the Cenozoic giant Kadjaran porphyry Cu-Mo and epithermal system, southern Armenia, Lesser Caucasus
HovakimyanSamvel, MoritzRobert, RezeauHervé, HarutunyanMarianna, HovhannisyanArshavir, MelkonyanRafael, TayanRodrik, IskandaryanGevorg (2019), Structural control and tectonic environment of the Cenozoic giant Kadjaran porphyry Cu-Mo and epithermal system, southern Armenia, Lesser Caucasus, in Proceedings of the 15th SGA Biennial Meeting, Glasgow, Glasgow, Scotland.
Incremental Growth of Mid- to Upper-Crustal Magma Bodies During Arabia–Eurasia Convergence and Collision: A Petrological Study of the Calc-Alkaline to Shoshonitic Meghri–Ordubad Pluton (Southern Armenia and Nakhitchevan, Lesser Caucasus)
Rezeau Hervé, Leuthold Julien, Tayan Rodrik, Hovakimyan Samvel, Ulianov Alexey, Kouzmanov Kalin, Moritz Robert (2018), Incremental Growth of Mid- to Upper-Crustal Magma Bodies During Arabia–Eurasia Convergence and Collision: A Petrological Study of the Calc-Alkaline to Shoshonitic Meghri–Ordubad Pluton (Southern Armenia and Nakhitchevan, Lesser Caucasus), in Journal of Petrology, 59(5), 931-966.
Post-collisional magmatism and ore-forming systems in the Menderes massif: new constraints from the Miocene porphyry Mo–Cu Pınarbaşı system, Gediz–Kütahya, western Turkey
Delibaş Okan, Moritz Robert, Chiaradia Massimo, Selby David, Ulianov Alexey, Revan Mustafa Kemal (2017), Post-collisional magmatism and ore-forming systems in the Menderes massif: new constraints from the Miocene porphyry Mo–Cu Pınarbaşı system, Gediz–Kütahya, western Turkey, in Mineralium Deposita, 52(8), 1157-1178.
30 Myr of Cenozoic magmatism along the Tethyan margin during Arabia–Eurasia accretionary orogenesis (Meghri–Ordubad pluton, southernmost Lesser Caucasus)
Rezeau Hervé, Moritz Robert, Leuthold Julien, Hovakimyan Samvel, Tayan Rodrik, Chiaradia Massimo (2017), 30 Myr of Cenozoic magmatism along the Tethyan margin during Arabia–Eurasia accretionary orogenesis (Meghri–Ordubad pluton, southernmost Lesser Caucasus), in Lithos, 288-289, 108-124.
First evidence of phreatomagmatic breccia at the Late Cretaceous Madneuli polymetallic deposit, Bolnisi district, Lesser Caucasus, Georgia
PopkhadzeNino, MoritzRobert, NatsvlishviliMalkhaz, BitsadzeNugzar (2017), First evidence of phreatomagmatic breccia at the Late Cretaceous Madneuli polymetallic deposit, Bolnisi district, Lesser Caucasus, Georgia, in Proceedings of the 14th SGA Biennial Meeting., Quebec, Quebec, Canada.
Gold deposits of the Lesser Caucasus: products of successive Mesozoic and Cenozoic geodynamic settings
MoritzRobert (2017), Gold deposits of the Lesser Caucasus: products of successive Mesozoic and Cenozoic geodynamic settings, in Proceedings of the 14th SGA Biennial Meeting, Quebec, Quebec, Canada.
Structural control of the Cenozoic porphyry Cu-Mo, epithermal and skarn deposits and prospects, Central Tethyan belt, Lesser Caucasus
HovakimyanSamvel, MoritzRobert, TayanRodrik, MelkonyanRafael, HarutyunyanMarianna (2017), Structural control of the Cenozoic porphyry Cu-Mo, epithermal and skarn deposits and prospects, Central Tethyan belt, Lesser Caucasus, in Proceedings of the 14th SGA Biennial Meeting, Quebec, Quebec, Canada.
Long-lived, stationary magmatism and pulsed porphyry systems during Tethyan subduction to post-collision evolution in the southernmost Lesser Caucasus, Armenia and Nakhitchevan
Moritz Robert, Rezeau Hervé, Ovtcharova Maria, Tayan Rodrik, Melkonyan Rafael, Hovakimyan Samvel, Ramazanov Vagif, Selby David, Ulianov Alexey, Chiaradia Massimo, Putlitz Benita (2016), Long-lived, stationary magmatism and pulsed porphyry systems during Tethyan subduction to post-collision evolution in the southernmost Lesser Caucasus, Armenia and Nakhitchevan, in Gondwana Research, 37, 465-503.
Metallogeny of the Lesser Caucasus: From Arc Construction to Postcollision Evolution
MoritzRobert, MelkonyanRafael, SelbyDavid, PopkhadzeNino, GugushviliVladimer, TayanRodrik, RamazanovVagif (2016), Metallogeny of the Lesser Caucasus: From Arc Construction to Postcollision Evolution, in Richards Jeremy (ed.), Society of Economic Geologists, Denver, Colorado, USA, 157-192.
Temporal and genetic link between incremental pluton assembly and pulsed porphyry Cu-Mo formation in accretionary orogens
Rezeau Hervé, Moritz Robert, Wotzlaw Jörn-Frederik, Tayan Rodrik, Melkonyan Rafael, Ulianov Alexey, Selby David, d’Abzac François-Xavier, Stern Richard A. (2016), Temporal and genetic link between incremental pluton assembly and pulsed porphyry Cu-Mo formation in accretionary orogens, in Geology, 44(8), 627-630.
Cretaceous subduction-related magmatism and associated porphyry-type Cu–Mo prospects in the Eastern Pontides, Turkey: New constraints from geochronology and geochemistry
Delibaş Okan, Moritz Robert, Ulianov Alexey, Chiaradia Massimo, Saraç Cem, Revan Kemal M., Göç Deniz (2016), Cretaceous subduction-related magmatism and associated porphyry-type Cu–Mo prospects in the Eastern Pontides, Turkey: New constraints from geochronology and geochemistry, in Lithos, 248-251, 119-137.

Collaboration

Group / person Country
Types of collaboration
Al. Djalenidze Insitute of Geology, Tbilisi State University, Georgia Georgia (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Baku State University, Azerbaijan Aserbaijan (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Durham University, Great Britain Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
National Academy of Sciences of the Republic of Armenia, Yerevan Armenia (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Hacettepe University, Ankara Turkey (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
University of Lausanne Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Communication with the public

Communication Title Media Place Year
Media relations: print media, online media De l’or sous nos pieds Campus, Université de Genève Western Switzerland 2019
Media relations: print media, online media Riche en terres rares, la Suisse pourrait ouvrir des mines Le Matin Dimanche Western Switzerland 2019
Media relations: radio, television Les boues précieuses qui pourraient remettre le Japon dans la course RTS Western Switzerland 2018
Talks/events/exhibitions Les ressources minérales: risques, enjeux et défis Western Switzerland 2016

Awards

Title Year
Best poster presentation, 2019 bi-annual meeting of the Society of Geology Applied to Ore Deposits, Glasgow, Scotland, August 2019 2019
Best student presentation, 2016 Annual Meeting of the Society of Economic Geologists, September 2016, Cesme, Turkey 2016

Associated projects

Number Title Start Funding scheme
138130 Episodic Mesozoic to Tertiary ore-forming events along the Lesser Caucasus and adjoining tectonic provinces 01.11.2011 Project funding
121510 Contrasting Cretaceous-Tertiary gold and copper ore formation along the Tethyan arc (Serbia-Bulgaria-Greece-Georgia-Armenia) 01.11.2008 Project funding
155928 Episodic Mesozoic to Tertiary ore-forming events in successive geodynamic settings in an accretionary orogenic belt: the case of the Tethys orogenic belt 01.11.2014 Project funding
128324 Metallogeny of the Lesser Caucasus (Georgia, Armenia and Azerbaijan) 01.12.2009 SCOPES
188714 The Tethys metallogenic belt: A natural laboratory for understanding ore-forming processes from arc construction to post-collision evolution in orogenic belts 01.11.2019 Project funding

Abstract

In this project, we focus on the Lesser Caucasus, which extends from the Black Sea to the Caspian Sea. The Lesser Caucasus is the final product of a complex geodynamic and metallogenic evolution, lasting from Jurassic subduction of a northern branch of the Neotethys beneath Eurasia to final Neogene Arabia-Eurasia collision. This mountain belt is a hyphen, which links the Tethyan segments of Iran with the ones of Anatolia and Europe. Despite its pivotal location, the geodynamic, tectonic, magmatic and metallogenic knowledge of the Lesser Caucasus is lagging behind the comprehensive knowledge available for the geodynamic and metallogenic evolution of southeastern Europe, Anatolia and Iran. Our studies will contribute to filling this gap of knowledge.The Lesser Caucasus stands out as a unique segment of the Tethyan belt, because it has the particularity of featuring both well-preserved subduction and continental collision to post-collision stages in a relatively short and narrow crustal segment. This belt is invaluable for deciphering the role of structures previously acquired in the subduction stage, and that of the collisional ones, which controlled the numerous and successive ore-forming and magmatic events, which affected this region. This unique environment is unlike other portions of the Alpine-Himalayan orogenic belt, because in our study area the Arabia-Eurasia collision was accommodated essentially in the Greater Caucasus and along the North Anatolian Fault, preserving the independent evolutionary stages of the Lesser Caucasus.Ore formation along the Lesser Caucasus can be assigned to two different evolution stages: (1) Mesozoic arc construction and evolution along the Eurasian margin, and (2) Cenozoic magmatism and tectonics controlled by structures inherited from Late Cretaceous-Paleogene accretion boundaries along the Eurasian margin. In order to clarify the geodynamic and metallogenic evolution of the Lesser Caucasus this investigation has been subdivided into three subprojects. Subproject A will last only for three months and will allow our current Ph.D. student to finalise his thesis manuscript on his research on the temporal and genetic link between incremental pluton assembly and pulsed porphyry Cu-Mo formation in an accretionary orogeny, focused on the southernmost Lesser Caucasus. Subproject B will last three years, and one new Ph.D. student will be supported by this project, and will collaborate with a post-doctoral fellow already working on Cenozoic epithermal and porphyry deposits of the Lesser Caucasus to understand the role of subduction and collision/post-collision tectonics and magmatism during their genesis. Support for two years is requested for one post-doctoral fellow to work on subproject C, which will allow us to provide an integrated model for the Jurassic to Cenozoic metallogenic evolution of the Lesser Caucasus. This subproject is designed to investigate the link among ore bodies, tectonic elements, and magmatic rocks along two representative transects across the Lesser Caucasus.The investigations described in this grant proposal are relevant to a large palette of disciplines in geosciences. This comprehensive study integrates tectonic aspects, magmatism, high-precision geochronology and ore formation in order to provide an integrated geodynamic and metallogenic model for the Lesser Caucasus. This project will allow us to identify key processes (tectonic setting, fertile vs. barren magmatism, timing-contemporaneity of events) that operate during short, pulsed ore deposit forming events in an otherwise long, mostly barren geodynamic evolution of mountain belts. Such knowledge is useful to develop predictive tools for mineral exploration, and ensure the sustainable supply of mineral resources.
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