Session GD2.1

[Programme]

GD2.1 | Geochemical and geodynamic perspectives on the origin and evolution of deep-seated mantle melts and their interaction with the lithosphere

PICO

Geochemical and geodynamic perspectives on the origin and evolution of deep-seated mantle melts and their interaction with the lithosphere

Co-organized by GMPV10

Convener: Igor Ashchepkov | Co-conveners: Sonja Aulbach, NV Chalapathi Rao, Evgenii Sharkov, Natalia LebedevaECSECS

PICO

| Mon, 15 Apr, 16:15–18:00 (CEST)

PICO spot 1

The origin and evolution of the continental lithosphere is closely linked to changes in mantle dynamics through time, from its formation through melt depletion to multistage reworking and reorganisation related to interaction with melts formed both beneath and within it. Understanding this history is critical to constraining terrestrial dynamics, element cycles and metallogeny. We welcome contributions dealing with: (1) Reconstructions of the structure and composition of the lithospheric mantle, and the influence of plumes and subduction zones on root construction; (2) Interactions of plume- and subduction-derived melts and fluids with the continental lithosphere, and the nature and development of metasomatic agents; (3) Source rocks, formation conditions (P-T-fO2) and evolution of mantle melts originating below or in the mantle lithosphere; (4) Deep source regions, melting processes and phase transformation in mantle plumes and their fluids; (5) Modes of melt migration and ascent, as constrained from numerical modelling and microstructures of natural mantle samples; (6) Role of mantle melts and fluids in the generation of hybrid and acid magmas.These topics can be illuminated using the geochemistry and fabric of mantle xenoliths and orogenic peridotites, mantle-derived melts and experimental simulations.

PICO: Mon, 15 Apr | PICO spot 1

Chairpersons: Sonja Aulbach, Igor Ashchepkov, NV Chalapathi Rao

Theoretical and experimental aspects of plume magmatism. Chairmen: Sonja Aulbach, Igor Ashchepkov

EGU24-16571

Highlight

On-site presentation

The origin of melilitites: preliminary results on melting of a carbonated wehrlite

Stefano Poli and Leone Melluso

EGU24-5761

On-site presentation

Can Venus and Mars Inform Us About Intraplate Magmatism on Earth?

Scott King et al.

EGU24-14567

ECS

Highlight

Virtual presentation

An emerging plume head at Hawaii

Lipeng Zhang et al.

EGU24-5160

On-site presentation

Mg isotopic compositions of post-spreading lavas in the South China Sea

Quanshu Yan and Xuefa Shi

EGU24-7403

ECS

Highlight

On-site presentation

Quaternary volcanism in southeastern Tibetan Plateau: A record of stagnant oceanic slab in the mantle transitional zone

Huan Kang et al.

EGU24-4864

On-site presentation

Meso-Neoarchean coupled crust-mantle differentiation followed by gravity-driven lithospheric delamination and subduction initiation in the North China Craton

Jianhui Liu

EGU24-7577

ECS

Highlight

On-site presentation

Seismic evidence of upper mantle melt caused by a subducted slab in the Indian-Eurasian continental subduction zone

Guohui Li

EGU24-4048

Virtual presentation

Analyze of the structural conditions of heat and mass transfer under volcanoes of the northwestern sector of the Pacific ocean- Eurasian continent transition

Viktor Sharapov et al.

EGU24-14538

Virtual presentation

Features of the introduction of magmatic melts in permeable zones of the platform cover

Yury Perepechko et al.

EGU24-3630

Virtual presentation

The influence of the Siberian plume to the formation of Angaro-Vitim batholiths

Andrey Tsygankov et al.

EGU24-1231

On-site presentation

Thermal state and nature of the low crust in the Baikal Rift zone according to the lower crust xenoliths of Cenozoic volcanics and Paleozoic magmas.

Igor Ashchepkov et al.

Alkaline ultramfic and mafic plume-related magmatism. Chairmen: NV Chalapthi Rao, Natalia Lebedeva

EGU24-4288

ECS

OSPP

On-site presentation

Post-tholeiite rifting and genesis of ultramafic lamprophyres at ~65 Ma in the Deccan Large Igneous Province, India

Anshika Singh and Ashish Dongre

EGU24-8338

ECS

On-site presentation

The alkaline rocks olivine variety: a case study of Namuaive Pipe, Kola alkaline province, Russia

Natalia Lebedeva et al.

EGU24-616

ECS

Highlight

Virtual presentation

The Namuaiv picrite-melanephelinite pipe, Kola alkaline province, Russia: petrography and evolution of late alkaline melts during forming large alkaline province with carbonatites.

Darina Shaikhutdinova et al.

EGU24-3965

Virtual presentation

Stages of the vein series formation processes of the Burpala massif (North Baikal), according to chemical microprobe Th-U-Pb dating of monazites (on hold)

Irina Sotnikova et al.

EGU24-15472

ECS

Highlight

On-site presentation

Petrogenetic evolution of post-collisional paleoproterozoic mafic dykes from the contact of Bastar Craton and Eastern Ghat Mobile Belt, India: Insights from petrology, geochemistry and Sr-Nd-Hf-Pb-Os isotopes.

Mahendra Kumar Singh et al.

EGU24-4770

ECS

OSPP

On-site presentation

Geochronological, petrological and tectonic implications of the Proterozoic massif-type anorthosite intrusions and related rocks from the northern Oaxacan Complex, southern Mexico

Luis Alejandro Elizondo Pacheco et al.

EGU24-3977

ECS

OSPP

Virtual presentation

Petrogenesis and geochronological constraints on the timing of Carbonatite-syenite magmatism at the Archean-Proterozoic boundary in the Western Dharwar Craton, southern India.

Samir Debnath et al.

EGU24-2198

Virtual presentation

Petrological and geochemical aspects of the formation of Devonian plume-riftogenic volcanics of the Rastayskiy and Saralinskiy grabens (Kuznetskiy Alatau)

Ruslan Adylbaev et al.

Metallogenic aspects of mantle magmaitm. Chaimen: Igor Ashchepkov and Eugeni Sharkov

EGU24-4498

On-site presentation

Role of sediment-derived melts in Mo cycling of subduction zone

Feng Huang et al.

EGU24-2192

ECS

Virtual presentation

Geochemical evidence of the plume nature of Devonian mafic rocks of the Rudny Altai (Northwest of the Altai-Sayan folded area)

Alexey Semiryakov et al.

EGU24-103

ECS

On-site presentation

Oxygen-fugacity evolution of magmatic Ni-Cu sulfide deposits in East Kunlun: Insights from Cr-spinel composition

Lihui Jia et al.

EGU24-20570

Virtual presentation

On a tectonics, magmatism and hydrocarbons (HC, oil-gas) of the South Caspian - West Baluchestan, Middle East: some problems and constraints

Alexander Romanko et al.

Kimberlite magmatism and mantle xenolith. Chairmen Sonia Aulbach, NV Chalapathi Rao

EGU24-6583

ECS

Highlight

On-site presentation

Petrology and geochemistry of a Cratonic mantle-derived Eclogite Xenolith Suite from the Balmoral Kimberlite, Kimberley Region, South Africa

Jiten Pattnaik and Fanus Viljoen

EGU24-3574

Virtual presentation

The perspectives of finding of giant CLIPPIR-type diamonds in weakly diamondiferous kimberlites of the north of Yakutia (Western Anabar region) using method of 5E Mitchells’s diagrams and cluster analyses

Alexandr Ivanov et al.

EGU24-11448

Highlight

Virtual presentation

The silicate and carbonatite metasomatic alterations in lithospheric mantle under Siberian craton (the evidence of mantle xenoliths from Udachnaya pipe)

Tatiana Kalashnikova and Sergey Kostrovitsky

EGU24-14806

Virtual presentation

Reconstructions of mantle structure beneath kimberlites of Anabar shield and surroundings – similarities and differences.

Sergey Kostrovitsky et al.

17:09–18:00

Interactive presentations at PICO screens