FIRST OPEN SEMINAR
Day 1 (February 9, 2024)
9:30 – 9:45: Opening Session (A. Mateus)
9:45 – 10:00: General overview of the MOSTMEG project (A. Mateus)
THE GÓIS-PANASQUEIRA-ARGEMELA-SEGURA STRIP
10:00 – 10:20 (+ discussion): Harmonised lithostratigraphy and structural arrangements; progress and issues open to debate (Í. Dias da Silva, I. Martins, A. Mateus, A. Pereira)
10:30 – 10:50 (+ discussion): Geochemical and mineralogical features of the Beiras Group metasediments; are they relevant to regional metal endowment? (I. Martins, A. Mateus, M. Helena Hollanda, C. Tassinari, Í. Dias da Silva, A. Pereira)
11:00 – 11:20 (+ discussion): Compositional attributes and geochronology of granite suites; implications to metallogenic processes (I. Martins, A. Mateus, Í. Dias da Silva, C. Tassinari, K. Sato, M. Helena Hollanda, I. Ribeiro da Costa, M. Cathelineau, M.-C. Boiron)
Coffee Break (11:30 – 12:00)
12:00 – 12:20 (+ discussion): What do mineralogical variations in contact metamorphic haloes tell us? (M. Cathelineau, M.-C. Boiron, G. Yeo, A. Lecomte, C. Peiffert, Í. Dias da Silva, A. Mateus, I. Martins)
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? (Í. Dias da Silva, A. Mateus, I. Martins, L. Miguel Gaspar, M. Cathelineau, M.-C. Boiron)
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 (Í. Dias da Silva, A. Mateus, I. Martins, L. Miguel Gaspar,
M. Cathelineau, M.-C. Boiron)
14:30 – 14:50 (+ discussion): Geochemical and mineralogical features of the Li-rich aplite-pegmatite system of Segura (M. Cathelineau, M.-C. Boiron, A. Lecomte, I. Martins, I. Dias da Silva, A. Mateus)
15:00 – 15:20 (+ discussion): Tin ores and fluids in the Segura district: from magmatic to hydrothermal stages (M.-C. Boiron, A. Guedes, A. Yakovenko, M. Cathelineau, G. Yeo, C. Peiffert, A. Lecomte)
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 (M.-C. Boiron, M. Cathelineau, L. Khouya, G. Yeo, C. Peiffert, A. Lecomte)
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 (A. Guedes, A. Yakovenko, M. Rodrigues,
L. M. Gaspar, A. Mateus)
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 (M. Cathelineau, M.-C. Boiron, L. Khouya, G. Yeo; in coll. A. Yakovenko, A. Guedes)
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 (R. Salgueiro, N. Grácio, L. M. Gaspar)
10:00 – 10:20 (+ discussion): Indications provided by compositional variations recorded in TiO2 polymorphs and tourmaline (L. M. Gaspar, N. Grácio, R. Salgueiro, M. Costa, I. Ribeiro da Costa, A. Mateus, I. Martins, P. Reis)
10:30 – 10:50 (+ discussion): Trace element analysis of cassiterite and its effectiveness in the recognition of different provenances (L. M. Gaspar, P. Moita, A. Cravinho,
M. Costa, P. Barrulas, M. Beltrane, J. Mirão, P. Reis, I. Martins, A. Mateus, N. Grácio,
R. Salgueiro, A. Guedes)
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 (I. Martins, A. Mateus, M. Cathelineau, M.-C. Boiron, I. Ribeiro da Costa, Í. Dias da Silva, L. M. Gaspar)
12:30 – 12:50 (+ discussion): Are the REE, U, and Th contents of zircon sensitive to magmatic-hydrothermal processes concurrent of mineralisation? (A. Mateus, C. Tassinari, I. Martins, M. L. Borba; Í. Dias da Silva, K. Sato)
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 (R. Salgueiro, N. Grácio)
14:30 – 14:50 (+ discussion): The use of mXRF to resolve textural and mineral arrangements (M. Cathelineau, M.-C. Boiron – in coll. I. Martins, A. Mateus)
15:00 – 15:30 (+ discussion): Advantages of using the mineral-system approach in planning exploration surveys (A. Mateus, I. Martins, Í. Dias da Silva. L. M. Gaspar,
I. Ribeiro da Costa)
15:30 – 16:00: Display of materials on different stands/tables for consultation and discussion.
Coffee Break (16:00 – 16:30)
16:30 – 17:00: Closing session (A. Mateus)
SECOND OPEN SEMINAR
Day 1 (June 7, 2024)
9:15: Registration
9:45: Opening Session. Welcoming words to participants (P. Moita; A. Mateus).
10:00: Structures and tectonic evolution of the Góis-Panasqueira-Segura strip (Í. Dias da Silva, I. Martins, A. Mateus)
10:30: Petrographic analysis of cordierite(?)- and andalusite-bearing metasediments of the Beiras Group, Castanheira de Pera region, Central Portugal (E. Gomes, F.C. Lopes, Í. Dias da Silva, M.M. Vinha, H. Rodrigues, A. Pereira)
Coffee Break (11:00 – 11:30)
11:30: Geochemistry and geochronology of granitoid rocks forming the W-SW border of the Fundão pluton. (A.R. Andrade, Í. Dias da Silva, A. Mateus, P. Montero, A. Cambeses)
12:00: Granite facies enveloping the Mata da Rainha ore-forming system; insights into their composition and relation to the mineralizing events. (B. Pereira, A. Mateus, Í. Dias da Silva)
12:30: Some details on the geochronology, geochemistry and mineralogy of the Penamacor-Monsanto granite system. (I. Ribeiro da Costa, A. Mateus, I. Martins, Í. Dias da Silva; C. Tassinari, M.H. Hollanda, M. Cathelineau, M.-C. Boiron)
Lunch Break (13:00 – 14:00)
14:00: Metasomatism and F, Li, Cs enrichment in Beiras schists around the Argemela hyperdifferentiated intrusion (CIZ, Portugal) (M. Cathelineau, M.-C. Boiron, G. Yeo, Ch. Peiffert, I. Martins, Í. Dias da Silva, A. Mateus)
14:30: Trace elements in magmatic and hydrothermal micas as geochemical tracers. (M.-C. Boiron, M. Cathelineau, C. Peiffert, I. Martins, I. Dias Silva, A. Mateus)
15:00: Decoding Sn-W mineralisations and tourmalinization events through key alluvial heavy minerals, in Segura: a stage of target generation. (R. Salgueiro, N. Grácio, M. Gaspar)
Coffee Break (15:30 – 16:00)
16:00: LNEG contribution to the Alentejo region Integrated Mineral Exploration Data Management. (J.X. Matos)
16:30 – 18:00: Analytical infrastructure of HERCULES Laboratory: geomaterials and prospecting (with visit) (J. Mirão)
Day 2 (June 8, 2024)
9:30: What’s hidden behind cassiterite geochemistry? A multiscale deciphering approach from ore-forming systems to mineral exploration (L.M. Gaspar, P. Moita, Z. Chang, R. Salgueiro, N. Grácio, S. Huang, A. Cravinho, M. Costa, M. Beltrane, P. Barrulas, P. Reis, I. Martins, A. Mateus, M.-C. Boiron, M. Cathelineau)
10:00: Metallogenesis of the Vale Pião W–Sn–(Au) deposit (Góis, Portugal): constraints from geochemistry, mineralogy and fluid inclusions (L.M. Gaspar, I. Martins, F. Martins, A. Guedes, A. Yakovenko; M. Rodrigues, D. Lobarinhas, C. Rosa)
10:30: Modelling the ore potential of peraluminous granite-related systems; implications to mineral exploration strategies. (A. Mateus, I. Martins, L.M. Gaspar, I. Ribeiro da Costa, M. Cathelineau, M.-C. Boiron)
Coffee Break (11:00 – 11:30)
11:30: From harmonized multidisciplinary data to prospectivity maps in the Góis-Panasqueira-Argemela-Segura strip. (A. Mateus, Í. Dias da Silva; I. Martins, L.M. Gaspar, M. Cathelineau, M.-C. Boiron, I. Ribeiro da Costa, R. Salgueiro)
12:00: Closing session. (A. Mateus)
Lunch Break (12:00 – 13:30)
14:00 (Closed Session): Steering Group Meeting (preparation of final report)