Seminars | MOSTMEG

FIRST OPEN SEMINAR

Programme (MOSTMEG_Seminar_Feb2024_FinalProgramme)

Day 1 (February 9, 2024)

9:30 – 9:45: Opening Session. (Day1_1_Welcome)

9:45 – 10:00: General overview of the MOSTMEG project (Day1_2_ProjectOverview)

THE GÓIS-PANASQUEIRA-ARGEMELA-SEGURA STRIP

10:00 – 10:20 (+ discussion): Harmonised lithostratigraphy and structural arrangements; progress and issues open to debate (Day1_3_Lithostratigraphy_Structure)

10:30 – 10:50 (+ discussion): Geochemical and mineralogical features of the Beiras Group metasediments; are they relevant to regional metal endowment? (Day1_4_Metasediments)

11:00 – 11:20 (+ discussion): Compositional attributes and geochronology of granite suites; implications to metallogenic processes (Day1_5_Granites_Composition_Chronology)

Coffee Break (11:30 – 12:00)

12:00 – 12:20 (+ discussion): What do mineralogical variations in contact metamorphic haloes tell us? (Day1_6_ContactMetamorphicHaloes)

12:30 – 12:50 (+ discussion): What is the relevance of mapping regional shear zones? What constraints do these structures impose to the delimitation of Sn-W and Li-rich systems? (Day1_7_ShearZones)

Lunch Break (13:00 – 14:00)

NEW DATA ON SELECTED MINERALISING SYSTEMS

14:00 – 14:20 (+ discussion): Geological characteristics of the Argemela-Fundão, Mata da Rainha and Segura sectors (Day1_8_Geology_MainTargets)

14:30 – 14:50 (+ discussion): Geochemical and mineralogical features of the Li-rich aplite-pegmatite system of Segura (Day1_9_AplitePegmatiteSystemSegura)

15:00 – 15:20 (+ discussion): Tin ores and fluids in the Segura district: from magmatic to hydrothermal stages (Day1_10_TinOres_Fluids)

15:30 – 15:50 (+ discussion): The W-Sn quartz lodes of Mata da Rainha and related anomalous tourmalization; insights from integrated fluid inclusion analysis and boron isotopes (Day1_11_MataDaRainhaQuartzLodes)

Coffee Break (16:00 – 16:30)

16:30 – 16:50 (+ discussion): The nature of mineralising fluids involved in the Pedra-Alta (Sn-Li) and Vale Pião (W) systems (Day1_12_MineralisingFluids_PedraAlta_ValePiao)

17:00 – 17:20 (+ discussion): Fluid evolution and PTX-t path during the long-lived magmatic systems related to Sn-W mineralizations Panasqueira, Mata da Rainha and Segura (Day1_13_Fluids_SnW_Systems)

Day 2 (February 10, 2024)

RELEVANT MINERAL/GEOCHEMICAL FINGERPRINTS/FOOTPRINTS TO ORE-FORMING SYSTEMS

9:30 – 9:50 (+ discussion): The usefulness of alluvial heavy minerals in the exploration of granite-related mineral systems; the case of Segura (Day2_1_AlluvialHeavyMineralsSegura)

10:00 – 10:20 (+ discussion): Indications provided by compositional variations recorded in TiO₂ polymorphs and tourmaline (Day2_2_TiPolimorphs_Tourmaline)

10:30 – 10:50 (+ discussion): Trace element analysis of cassiterite and its effectiveness in the recognition of different provenances (Day2_3_CompositionalVariationsCassiterite)

Coffee Break (11:00 – 11:30)

11:30 – 12:00: Display of materials on different stands/tables for consultation and discussion.

12:00 – 12:20 (+ discussion): Geochemical proxies to granite-related mineral systems using multi-element whole-rock analysis (Day2_4_GeochemicalProxies)

12:30 – 12:50 (+ discussion): Are the REE, U, and Th contents of zircon sensitive to magmatic-hydrothermal processes concurrent of mineralisation? (Day2_5_REE_Zircon)

Lunch Break (13:00 – 14:00)

PRACTICAL TOOLS AND METHODS EASILY TRANSFERABLE TO EXPLORATION SURVEYS

14:00 – 14:20 (+ discussion): Production and characterisation of heavy minerals concentrates from alluvial sediments (Day2_6_HeavyMineralsConcentrates)

14:30 – 14:50 (+ discussion): The use of mXRF to resolve textural and mineral arrangements (Day2_7_MicroXRF)

15:00 – 15:30 (+ discussion): Advantages of using the mineral-system approach in planning exploration surveys (Day2_8_MineralSystemApproach)

15:30 – 16:00: Display of materials on different stands/tables for consultation and discussion.