Staff: GFZ

Experimental equilbria between and metasomatic alteration of REE-bearing minerals including apatite, britholite, monazite, xenotime, allanite, titanite, and chevkinite

Synthesis, themochemistry, and crystal chemistry of apatite along the F-Cl, F-OH, and Cl-OH joins

Characterization of apatite along the F-Cl, F-OH, and Cl-OH joins using single crystal XRD, Raman, and IR

Experimental stability of scapolite and plagioclase in the presence of supercritical brines at granulite-facies P-T

The role of fluids during mass transfer along grain boundaries

The role of fluids during emplacement of granitic magma bodies and pegmatoid bodies

The chemistry and oxidation/sulfidation potential of sulfur as recorded by oxides, sulfides, and scapolite during high-grade metamorphism (amphibolite- to granulite-facies grade) in the deep crust, and in the lithospheric mantle

Petrographic, mineralogical, and geochemical field studies of high-grade rocks (amphibolite- to granulite-facies grade, which currently focus on charnockites from southern India

Petrographic, mineralogical, and geochemical studies IOA ore deposits (Sweden, Iran, China, US), IOCG ore deposits, and ore deposits dominated by monazite (Steenkampskraal, Namaqualand, South Africa)

Petrographic, mineralogical, and geochemical studies of high-grade and low grade banded iron formations

Experimental studies into the role of fluids and melts during high grade metamorphism including genesis of both metamorphic and igneous charnockites

The stability and function of accessory REE- and actinide-bearing minerals as a function of metamorphic grade

Education:

Education:

BA Physics, Chemistry, and Geology Macalester College, St. Paul, Minnesota, USA

MS Astronomy and Astrophysics, University of Wisconsin, Madison, Wisconsin, USA

MS Petrology, University of Wisconsin, Madison, Wisconsin, USA

PhD Geochemistry (Experimental Petrology and Thermodynamic Modeling), Purdue University, West Lafayette, Indiana, USA

Projects:

Harmony Project 2017/26/M/ST10/00407

"Experimental determination of the behaviour of REE during hydrothermal alteration"

Papers

BAGIŃSKI B., JOKUBAUSKAS P., MATYSZCZAK W., STACHOWICZ M., KOTOWSKI J., MACDONALD R., HARLOV D., 2022. Experimental synthesis of the rare-earth fluoride gagarinite-(Ce) by fluid-induced alteration of chevkinite-(Ce). Canadian Mineralogist, in revision, preliminary acceptance.

Conference Presentations

Hydrothermal breakdown of chevkinite-(Ce) – evidence from experiments - presentation on the XXVIth Meeting of the Petrology Group of the Mineralogical Society of Poland, 2019, authors Bogusław Bagiński, Daniel Harlov, PetrasJokubauskas, Witold Matyszczak and Ray Macdonald

REE redistribution during the fluid-induced alteration of chevkinite-(Ce): an experimental approach - presentation on the XVII 17th International Symposium on Experimental Mineralogy, Petrology and Geochemistry, Potsdam, 2021, authors Daniel E. Harlov ,Bogusław Bagiński, Witold Matyszczak , Petras Jokubauskas , Jakub B. Kotowski, and Ray Macdonald

FLUID-INDUCED ALTERATION OF CHEVKINITE- (Ce) AND STRUCTURAL ORIENTATION RELATIONS AT THE PHASE BOUNDARY - presentation on the 3 rd European Mineralogical Conference EMC 2020, Cracow, Poland, 2021, authors Stachowicz Marcin, Daniel E. Harlov ,Bogusław Bagiński, Witold Matyszczak , Petras Jokubauskas , Jakub B. Kotowski, and Ray Macdonald

Phosphate, silicate, and oxide minerals as monitors of geodynamic processes

Experiments involving phosphate and silicate minerals cover a wide range of minerals and fluid compositions. Most of these experiments have their origins and inspiration from natural processes involving metasomatically-induced partial alteration and/or re-equilibration of various phosphate and silicate minerals or phosphate-silicate mineral groups.

Experimental projects include:

Experimental metasomatic trace element (Ti and V) alteration of magnetite at 400 to 800 °C and 100 MPa

Experimental fluid-aided incorporation of actinides into monazite and xenotime utilizing both alkali-rich fluids and simple, fluid-rich granitic melts.

Synthesis, crystal chemistry, and thermochemistry of apatite along the F-Cl, F-OH, and Cl-OH joins.

Experimental dissolution of monazite and xenotime in NaCl- and NaF-bearing fluids as a function of P-T-X

Test dating of experimentally fluid-altered, Pb-depleted monazite utilizing electron microprobe analysis.

Experimental incorporation or depletion of Th, U, and (Y+HREE) into zircon utilizing alkali-bearing and Ca-bearing fluids.

Experimental determination of fluorapatite, monazite, xenotime, allanite, and REE-enriched epidote stability fields in monazite-apatite-allanite and xenotime-apatite-allanite metapelitic systems as a function of P-T-X.

LREE-redistribution between fluorapatite, monazite, and allanite at high pressures and temperatures.

Thermodynamic, XRD, IR, Raman, and electron microscopic analytical characterization of apatite across the F – Cl, F – OH, and Cl – OH joins.

Experimental fluid-aided incorporation of (Y+HREE) into garnet as a function of P-T-X.

Experimental metasomatic alteration of low grade banded iron formations under low grade condtions

Experimental replication of high-grade altered banded iron formations

Experimental fluid-aided incorporation of As and Sb into dumortierite under subduction zone P-T conditions.

The experimental stability of scapolite as a function of P-T-X_NaCl under amphibolite- to granulite-facies conditions.

High-grade fluid metasomatism in the lower crust and upper mantle

The chemical and physical evolution and stability of the mid to lower crust and upper mantle can be strongly affected by fluids such as H₂O, CO₂, and KCl/NaCl/CaCl₂ brines.

Studies of high-grade fluid metasomatism in the lower crust and upper mantle include:

Changes in the mineral chemistry across traverses of both regional and localised dehydration zones. In these studies, solid-state dehydration by low H₂O activity fluids has been and is currently being utilized to demonstrate how hornblende and/or biotite react with quartz to form orthopyroxene +/- clinopyroxene, feldspar and a fluid phase during granulite-facies metamorphism. Low H₂O activity fluids include those with a significant CO₂ and/or (Na,K)Cl-CaCl₂ brine component. Such fluids have been proposed to play a significant role during the granulite-facies metamorphism of basaltic and granitoid rocks in the lower crust.

SIMS analysis of 29 zircon separates across a regional (100 km) traverse of late Archean, lower crust, Shevaroy Block, Tamil Nadu, South India to study how zircon HREE and actinide chemistry, along with U-Th-Pb dating, change during metamorphism. One of the purposes of this study is to understand how potential fluids, streaming upwards from the crust-mantle boundary, could influence gradations in mineral chemistry and REE distribution along the traverse.

Mineralogical, petrological, and geochemical regional study of oxide-sulfide and silicate mineral relations in high grade rocks (charnockites, two-pyroxene granulites, and metagabbros) from the Nilgiri Massif, southern India

Mineralogical, petrological, and geochemical regional study of oxide-sulfide and silicate mineral relations in high grade rocks (amphibolite-facies rocks, charnockites, and metagabbros) from the Madras Block, southern India

LA-ICPMS study of fluorapatite, garnet, amphibole, and clinopyroxene (Y+REE) chemistry across a lower crustal, fluid-activated, localised orthopyroxene-bearing dehydration zone, Söndrum stone quarry, SW Sweden.

A regional study investigating the role of CO₂-rich and H₂O-rich fluids during the genesis and evolution of a co-genetic granite and magmatic charnockite association as well as their influence on the surrounding amphibolite-facies gneiss, country rock, Varberg-Torpa charnockite-granite association, SW Sweden.

The role of CO₂-rich fluids in the formation of charnockite patches in a granitic magma during emplacement of the Weinberg granite, north central Austria.

Comprehensive study of the influence of fluids on apatite mineral chemistry (focusing on Cl, F, OH, CO₃ chemistry) in the lower crust and upper mantle.

Experimental dehydration of granitoid rocks, under granulite-facies conditions, utilizing both partial melts and low H₂O activity fluids including both CO₂ and supercritical NaCl-KCl brines.

Experimental formation of simple symplectites of K-feldspar and albitic plagioclase at the quartz-plagioclase interface utilizing both partial melts and low H₂O activity fluids.

Kiruna-type magnetite-apatite ore iron-oxide apatite (IOA) deposits

Kiruna magnetite-apatite ore deposits are being studied world wide with regard to their origins, crystallization history, fluid history, and subsequent evolution over time. These deposits include:

Kirunavaara magnetite-apatite ore deposit, Kiruna, northern Sweden

Mineralogy, petrology, and geochemistry IOA deposit - skarn relationships in the Middle-Lower Yangtze River Metallogenic Belt, eastern China

Grängesberg magnetite-apatite ore deposit, central Sweden

Esfordi, Chogart, Chadormalu, and Se-Chahun magnetite-apatite ore deposits, Bafq region, central Iran

Mineville magnetite-apatite ore deposit, Adirondacks, New York, USA

Pea Ridge magnetite-apatite ore deposit, Arkansas, USA

Field Projects

Field projects cover a variety of different metamorphic and igneous terranes and associated rock types on a planet wide scale. In general, many of these projects are closely integrated with experimental work involving silicate, phosphate, oxide, and sulfide minerals.

Field projects include:

Granulite- to amphibolite facies traverse of lower late Archean crust, Shevaroy Block, Tamil Nadu, south India.

The mesoproterozoic Steenkampskraal rare-earth element monazite-apatite deposit, Namaqualand, South Africa

Late Archean granulite-facies crust from the Nilgiri Block, Namakkal Block, Coorg Block, Biligiri-Rangan Hills Block, and Madras Block, south India.

Arrested charnockites, Kondalite Zone, Kerala, southern India and West Cape Province (Namaqualand, South Africa).

Orthopyroxene-bearing and clinopyroxene-bearing localized dehydration zones, Söndrum stone quarry, Halmstad, Kattegat coast, southwest Sweden.

Varberg-Torpa charnockite-granite association, Varberg, Kattegat coast, southwest Sweden

Arrested charnockite patches in the Weinberg granite, northern Austria.

Calcsilcate rocks and leucosomes, Halmstad, Kattegat coast, southwest Sweden.

Apatite, biotite, and clinopyroxene as tracers for metasomatic processes in nepheline clinopyroxenites of Uralian-Alaskan-type complexes in the Ural mountains, Russian Federation.

Studies of alumino-silicate minerals and apatite, Bamble Sector, southern Norway.

Alkaline-carbonatite magmatism, Alnö, Sweden.

Studies of accessory minerals, Ivrea-Verbano Zone, northern Italy.

Regional scale, pluton-driven, high-grade metamorphism in the Archean Minto block, northern Superior province, Canada.

Granulite-facies xenoliths from the Eger rift zone, northern Czech Republic.

Awards:

Fellow of the American Mineralogical Society

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