Isotope Geochemistry | Petrology
Portrait of Aleksandr Marfin

Aleksandr (Sasha)
Marfin

Investigating the geochemical signatures of mantle heterogeneity, crustal recycling, and magmatic processes through high-precision isotope analysis and integrated petrological approaches.

Research Profile
Publications13
h-index11
Citations230+
First-author papers5

Department of Earth and Atmospheric Sciences | University of Houston

Research Focus

Key Research Themes

My research sits at the intersection of isotope geochemistry, igneous petrology, geochronology, and mantle geodynamics. I am particularly interested in understanding the processes that govern the formation and evolution of magmatic systems, and how these processes are recorded in the geochemical and isotopic signatures of rocks and minerals.

Recycled Crustal Components in Mantle Sources

Tracing recycled crustal components in ocean island and continental basalts using radiogenic (Sr-Nd-Pb-Hf) and non-traditional (Cu-Mo-Tl) stable isotope systematics to constrain the composition and longevity of mantle heterogeneities.

Non-Traditional Stable Isotopes in Igneous Systems

Applying non-traditional (Cu, Mo, Tl, etc.) stable isotope proxies to resolve mantle source, interaction with upper crust in volcanic suites.

Geochemistry of Large Igneous Provinces

Constraining the petrogenesis and mantle source dynamics of flood basalt provinces through integrated major/trace element and multi-isotope approaches, linking deep plume processes to surface volcanism.

Magmatic Sulfide Ore Systems

Investigating the geochemical controls on sulfide saturation, PGE fractionation, and Ni-Cu mineralization in mafic-ultramafic intrusions through chalcophile element systematics.

MC-ICP-MS Analytical Workflows

Developing and refining high-precision analytical protocols for radiogenic and stable isotope measurements, including matrix separation chemistry.

Crust-Mantle Interaction Signatures

Integrating trace element ratios, isotopic compositions, and thermodynamic modeling to disentangle contributions from crustal assimilation, fractional crystallization, and source mixing.

Latest

News & Updates

July 2026

Remote talk at Goldschmidt 2026, Montreal, Quebec, Canada

Thallium isotopic constraints on the role of recycled components in the source of Siberian Trap basalts.

Dec 2025

Poster at AGU 2025, New Orleans, Louisiana, USA

Contributions of metasomatized lithosphere or asthenosphere to the formation of magmatic Ni-Cu-PGE deposits: Evidence from the Norilsk 1 deposit.

Dec 2025

Poster at AGU 2025, New Orleans, Louisiana, USA

Differentiated alkali-mafic-ultramafic Inagli intrusion (Aldan Shield, Russia): evidence for alkali magmatism in paleosubduction zones.

Sep 2025

New article published in Chemical Geology

The role of metasomatized lithospheric mantle in generating the Norilsk 1 Cu-Ni-platinum-group element sulfide deposit: Cu isotope evidence.