Abstract The Iberian Pyrite Belt is a world-class metallogenic district developed at the Devonian-Carboniferous boundary Variscides that currently has seven active mines: Neves Corvo (Cu-Zn-Sn) and Aljustrel (Cu-Zn) in Portugal, Riotinto (Cu), Las Cruces Aguas Teñidas (Cu-Zn-Pb), Sotiel-Coronada La Magdalena (Cu-Zn-Pb) Spain. massive sulfide ores are usually hosted lower sections of volcano-sed...

Introduction: Numerous studies at the Riotinto mining district have focused on astrobiology, sulfates and extremophilic microbial communities in the highly acidic aqueous environments [1-3]. In contrast, this project investigates past acidic alteration of nearby volcanic rocks. The present study covers a variety of alteration pathways that may influence volcanic protoliths, with the specific ty...

Carboniferous magmatism in southwestern Iberia was continuously active for more than 60 m.y. during the development of Appalachian-Variscan belt North America, Africa and Western-Central Europe. This collisional orogen that records closure Rheic Ocean is essential to understanding late Paleozoic amalgamation Pangea supercontinent. However, oblique convergence between Laurussia Gondwana lasted f...

Abstract Thirty Devonian-Carboniferous Boundary sections of the Rhenish Slate Mountains and adjacent subsurface areas are reviewed with respect to litho-, event, conodont, ammonoid, sequence, chemostratigraphy. In interval from base uppermost Famennian (Wocklum Beds, Wocklumian) middle Tournaisian (base Lower Alum Shale), 11 conodont 16 ammonoid (sub)zones distinguished. The terminology Hangenb...

Abstract The Borkewehr section near Balve at the southeastern end of Remscheid-Altena Anticline is currently best and most complete Devonian/Carboniferous Boundary (DCB) succession Rhenish Massif, Germany. Based on a multidisciplinary approach, focusing refined conodont ammonoid biostratigraphy, microfacies analyses, sequence stratigraphy, carbon isotopes (C org C carb ), trace element geochemi...

Redox state and salinity are fundamental properties of watermasses, in modern environments, detailed analysis spatial variability redox is possible through direct measurement. Watermass reconstruction difficult deep-time systems, however, because the sedimentary record ancient watermasses often incomplete or to access on scales large enough permit basin-scale reconstruction. During Middle Devon...

Background and Aims. The largely Mississippian strata of the Kilpatrick Hills, located at the western end of the Scottish Midland Valley, enclose several macrofossil floras that together contain ca 21 organ-species of permineralised plants and ca 44 organ-species of compressed plants, here estimated to represent 25 whole-plant species (Glenarbuck = nine, Loch Humphrey Burn Lower = 11, Upper = s...