Global geochemical cycling; Subduction zones; Chemical composition; Pb-Nd-Sr isotopes; LA-ICP-MS; Alps; Western Gneiss Region; Almirez; Subduction zones; Global element cycling; Laser ablation ICP-MS; Serpentinite; Fluid inclusions; Eclogite; Metasomatism; Diamond trap experiments
Kendrick M. A., Honda M., Pettke T., Scambelluri M., Phillips D. (2013), Halogen and noble gas systematics of ocean floor and ophiolitic serpentinites: implications for global volatile recycling, in Earth and Planetary Science Letters
, 356, 86-96.
Gotte T, Pettke T, Ramseyer K, Koch-Muller M, Mullis J (2011), Cathodoluminescence properties and trace element signature of hydrothermal quartz: A fingerprint of growth dynamics, in AMERICAN MINERALOGIST
, 96(5-6), 802-813.
Geiger CA, Alekseev E, Lazic B, Fisch M, Armbruster T, Langner R, Fechtelkord M, Kim N, Pettke T, Weppner W (2011), Crystal Chemistry and Stability of "Li7La3Zr2O12" Garnet: A Fast Lithium-Ion Conductor, in INORGANIC CHEMISTRY
, 50(3), 1089-1097.
Fisch M, Armbruster T, Rentsch D, Libowitzky E, Pettke T (2011), Crystal-chemistry of mullite-type aluminoborates Al18B4O33 and Al5BO9: A stoichiometry puzzle, in JOURNAL OF SOLID STATE CHEMISTRY
, 184(1), 70-80.
Dvir O, Pettke T, Fumagalli P, Kessel R (2011), Fluids in the peridotite-water system up to 6 GPa and 800 degrees C: new experimental constrains on dehydration reactions, in CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
, 161(6), 829-844.
Frank MR, Simon AC, Pettke T, Candela PA, Piccoli PM (2011), Gold and copper partitioning in magmatic-hydrothermal systems at 800 degrees C and 100 MPa, in GEOCHIMICA ET COSMOCHIMICA ACTA
, 75(9), 2470-2482.
Li GJ, Pettke T, Chen J (2011), Increasing Nd isotopic ratio of Asian dust indicates progressive uplift of the north Tibetan Plateau since the middle Miocene, in GEOLOGY
, 39(3), 199-202.
Hyeong K, Kim J, Pettke T, Yoo CM, Hur SD (2011), Lead, Nd and Sr isotope records of pelagic dust: Source indication versus the effects of dust extraction procedures and authigenic mineral growth, in CHEMICAL GEOLOGY
, 286(3-4), 240-251.
Lehmann K, Pettke T, Ramseyer K (2011), Significance of trace elements in syntaxial quartz cement, Haushi Group sandstones, Sultanate of Oman, in CHEMICAL GEOLOGY
, 280(1-2), 47-57.
Richard A, Pettke T, Cathelineau M, Boiron MC, Mercadier J, Cuney M, Derome D (2010), Brine-rock interaction in the Athabasca basement (McArthur River U deposit, Canada): consequences for fluid chemistry and uranium uptake, in TERRA NOVA
, 22(4), 303-308.
Kouzmanov K, Pettke T, Heinrich CA (2010), Direct Analysis of Ore-Precipitating Fluids: Combined IR Microscopy and LA-ICP-MS Study of Fluid Inclusions in Opaque Ore Minerals, in ECONOMIC GEOLOGY
, 105(2), 351-373.
Dijkstra AH, Sergeev DS, Spandler C, Pettke T, Meisel T, Cawood PA (2010), Highly Refractory Peridotites on Macquarie Island and the Case for Anciently Depleted Domains in the Earth's Mantle, in JOURNAL OF PETROLOGY
, 51(1-2), 469-493.
Almqvist BSG, Herwegh M, Schmidt V, Pettke T, Hirt AM (2010), Magnetic susceptibility as a tool to study deformed calcite with variable impurity content, in GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
, 11(Article Nu), 1-15.
Muntener O, Manatschal G, Desmurs L, Pettke T (2010), Plagioclase Peridotites in Ocean-Continent Transitions: Refertilized Mantle Domains Generated by Melt Stagnation in the Shallow Mantle Lithosphere, in JOURNAL OF PETROLOGY
, 51(1-2), 255-294.
von Allmen K, Nagler TF, Pettke T, Hippler D, Griesshaber E, Logan A, Eisenhauer A, Samankassou E (2010), Stable isotope profiles (Ca, O, C) through modern brachiopod shells of T. septentrionalis and G. vitreus: Implications for calcium isotope paleo-ocean chemistry, in CHEMICAL GEOLOGY
, 269(3-4), 210-219.
Landtwing MR, Furrer C, Redmond PB, Pettke T, Guillong M, Heinrich CA (2010), The Bingham Canyon Porphyry Cu-Mo-Au Deposit. III. Zoned Copper-Gold Ore Deposition by Magmatic Vapor Expansion, in ECONOMIC GEOLOGY
, 105(1), 91-118.
Pickering R, Kramers JD, Partridge T, Kodolanyi J, Pettke T (2010), U-Pb dating of calcite-aragonite layers in speleothems from hominin sites in South Africa by MC-ICP-MS, in QUATERNARY GEOCHRONOLOGY
, 5(5), 544-558.
Jagoutz OE, Burg JP, Hussain S, Dawood H, Pettke T, Iizuka T, Maruyama S (2009), Construction of the granitoid crust of an island arc part I: geochronological and geochemical constraints from the plutonic Kohistan (NW Pakistan), in CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
, 158(6), 739-755.
Nagashima M., Armbruster T., Langner R., Fechtelkord M., Kim N., Pettke T., Lahti S., Grobety B., Is there an epidote-group mineral with Ca2Al2Cr3+Si3O12(OH) composition?, in European Journal of Mineralogy
Pettke T., Oberli F., Audetat A., Guillong M., Simon A., Hanley J., Klemm L, Recent developments in element concentration and isotope ratio analysis of individual fluid inclusions by laser ablation single and multiple collector ICP–MS., in Ore Geology reviews
Aqueous fluids profoundly influence chemical and physical processes in subduction zones. Here, at convergent plate margins, commonly oceanic lithosphere (the slab) sinks (subducts) beneath continents, triggering many directly observable processes, including volcanic activity and earthquakes. Almost all these processes are directly or indirectly affected at some stage by a fluid phase. Properties of these liquids at depths exceeding a few tens of kilometres are only vaguely known, however, notably their chemical composition, how they move, how much mass flux they effect and over what scales in distance and time they operate. These issues probably represent the most serious impediment towards a more quantitative understanding of the chemical cycling in subduction zones.This follow-up proposal aims at further constraining the subduction cycle of hydrated oceanic mantle, serpentinites. The first aspect deals with the antigorite dehydration reaction, an essential snapshot during serpentinite subduction. Special emphasis is on the chemical and Pb-Sr-isotopic composition of the dehydration fluid captured in prograde, tiny fluid inclusions and its associated mineral assemblages (antigorite serpentinites and the devolatilization products, olivine - orthopyroxene - chlorite rocks) from Cerro del Almirez, Spain. This represents the only locality known to date where the antigorite-out reaction can be studied and sampled in the field. Bulk rock data will also be analyzed for Nd and possibly Hf isotopes in order to constrain the provenance of these serpentinites. A rigorous quantification of the chemical composition of the antigorite dehydration fluid can now be attacked in a much more comprehensive way, thanks to extensive LA-ICP-MS methods developments essential for the accurate in-situ analysis of ultra-trace element concentrations, achieved during the first stage of this project.The second aspect is the Sr-, Pb-, Nd- and possibly Hf-isotopic characterization of hydrated oceanic mantle, to characterizing the radiogenic isotope signatures that are eventually entering the subduction cycle. Modification of these radiogenic isotope signatures with progressive subduction are assessed through the analysis of antigorite-serpentinites and partly dehydrated olivine - orthopyroxene ± chlorite rocks. Only scattered such data are currently available, not allowing for a systematic assessment of the source tracer potential of these radiogenic isotope systems. Moreover, combination with extant major to trace element compositional data of the same samples (bulk rock and in-situ mineral data, in large parts available from the original project) will allow to addressing the combined chemical and isotope systematics of mantle hydration on the ocean floor and how these complementary signatures evolve with progressive subduction.The requested research will produce top-quality data efficiently and fill gaps in the chemical cycle of serpentinite subduction, including refertilization of mantle domains. The resulting comprehensive chemical and radiogenic isotope data set (original project plus follow-up proposal) is unprecedented and will allow to constraining fundamental issues on the relevance of hydrated mantle rocks in the fluid-mediated chemical cycling in subduction zones. It is generally accepted that hydrated mantle rocks essentially provide water to the subduction cycle. Which and how much of the soluble elements inventory actually originates from subducted serpentinites as opposed to subducted sediments will become much better quantified. Our views on fluid percolation paths and fluid compositional evolution will clarify. Addition of crustal components through subduction of largely devolatilized mantle rocks will better constrain deep mantle refertilization processes. Ancient subduction events most likely had similar effects. Ancient subduction-modified mantle domains can be identified through radiogenic isotope systematics and, given more quantitative constraints on modern subduction geochemical cycling, will allow assessing the effects of subduction on the evolution of Earth’s mantle and crust during the past >2 billion years.These fundamental research results will have profound implications on various key aspects of the global geochemical cycle and will inspire new initiatives in geosciences and possibly related research disciplines, well beyond the duration of this project.