Interest in the origin and traceability of agri-food products has led to an increasing number of publications using strontium isotope ratios as a geographic tracer. We used 87Sr/86Sr isotope systematics to authenticate the provenance of wine from different volcanic districts of Italy. Samples of soil, grapes, leaves and bottled wines from 6 different wineries were analysed. A detailed study of the different soil horizons from the Somma-Vesuvio area demonstrates the relationship between the 87Sr/86Sr of the soils and the different parts of the grapevine (root, steam, grape, grape pulp, grape seed, grape skin), and the soil characteristics (soil type, granulometry, root density) that control the 87Sr/86Sr of the end-products. Results showed that the geological characteristics of volcanic terranes of Italy, and in particular the northwest to southeast 87Sr/86Sr gradient, are inherited by the wines of each region, such that the wines can be discriminated and authenticated by their isotope ratios.

Fault networks in the Santos Basin play a key role in controlling depositional environmental conditions for sedimentation of the Barra Velha Formation. This work investigates how fault activity and reactivation affect the pre-salt carbonates and influence element distribution, integrating seismic interpretation, structural restoration and geochemical analyses for major elements (Ca, Mg, Sr, Fe, Mn) and isotopes (513C, 518O, 87Sr/86Sr). Results reveal three dominant fault sets (NNW-SSE, N-S, NNE-SSW), with significant deformation in the central sector of the Iracema region indicated by section restoration. Isotopic data of 513C (0.79 %o-3.16 %o) and 518O (-1.22 %o-3.86 %o) from the studied well are consistent with other fields in the basin, which reflects that regional control overcomes local tectonic impact on deposition. However, the lacustrine depositional setting is described with episodic environmental changes as Fe and Mn present extreme outlier values and faults may influence Sr mobilization in fluid migration. The 87Sr/86Sr values (0.7130-0.7144) suggest a dominant felsic continental source, with minor volcanic input. These findings reinforce the role of faulting in controlling element mobility and the structural evolution of pre-salt carbonates in the Tupi field.

Studies worldwide, particularly in Canada, Italy and Brazil, have demonstrated that the Sr-87/Sr-86 ratio is a reliable indicator of the geographic origin of wines. We present here the first Sr-87/Sr-86 isotope study for the Wines of Altitude of Santa Catarina geographical indication that was recently created in the state of Santa Catarina, southern Brazil. The goal of this study is to evaluate the forensic application of strontium isotope ratios as an indicator of provenance for the wines of S & atilde;o Joaquim, the main wine-growing region in the state of Santa Catarina, which produces wines from European grape varieties (Vitis vinifera L.) grown in soils formed by the weathering of volcanic rocks of the Serra Geral Group (Paran & aacute; Magmatic Province). The Sr-87/Sr-86 of rocks, soils (bulk and labile fractions), vines (leaves and grapes) and wines (Sauvignon Blanc and Cabernet Sauvignon) from three wineries from S & atilde;o Joaquim were determined. Bedrock Sr-87/Sr-86 ratios ranged from 0.705362 for the basaltic-andesitic rocks to 0.724819 for dacites, consistent with reported values for these types of rocks. We identified a strong correlation between the Sr-87/Sr-86 ratios of the grapes and leaves, but in contrast to most previous studies there was no correlation between those of the soil (both bulk and labile fractions) and wine samples. This indicates that although the Sr isotopes in grapes and leaves behaved conservatively, the Sr isotopes in the soils may have been modified by vineyard agricultural practices, such as fertilization and liming. We thus recommend that soil sampling be done at depths >60 cm to avoid external addition of strontium. As the Sr-87/Sr-86 ratios of commercial wines represent the average isotope ratio of a given vineyard, the isotope correlation between wines and the other samples may be challenging. Despite that, it was possible to distinguish the Sr-87/Sr-86 ratios of the wines from S & atilde;o Joaquim, state of Santa Catarina, from the wines from Bento Gon & ccedil;alves, state of Rio Grande do Sul. Even though the wines from both regions are made from grapes cultivated in the same geological unit, i.e., volcanic rocks from Serra Geral Group (Paran & aacute; Magmatic Province), the wines yield different Sr signatures.

The southeastern Superior Province contains Meso- to Neoarchean (2952-2677 Ma) tonalite-trondhjemite-granodiorite (TTG) suites, volcanic (2773-2703 Ma) and sedimentary (<2724 Ma) supracrustal sequences, and granitoid intrusions (2708-2598 Ma). The region is a key crustal cross-section for understanding the growth, evolution, and stabilization of Archean cratons. Whole-rock geochemistry and Nd isotopic analyses have been performed on TTG suites, volcanic assemblages and granitoid plutons of the La Grande, Nemiscau and Opatica subprovinces. These analyses, combined with existing structural and U-Pb geochronological data, have been used to investigate the extend of the basement within the three subprovinces, their interaction, and the degree of crustal reworking in the southeastern Superior Province. Nd isotope data and zircon inheritance indicate that the TTG suites were generated from: (i) an old crustal domain with Nd model ages at 3.5-3.2 Ga that may represent the southern extension of the Langelier Complex, (ii) a ca. 3.0 Ga domain with isotopically juvenile signatures, and (iii) the reworking of < 3.0 Ga Nd model age TTG suites from the Opatica subprovince. The Nd juvenile signatures of the mafic to ultramafic volcanism at ca. 2773-2756 and ca. 2723-2703 Ma suggest continuous or multiple mantle plume events beneath the southeastern Superior Province, whereas interlayered felsic volcanic rocks were formed from anatectic melting at high pressure. Subsequent magmatism was related to sanukitoid suites (2704-2693 Ma) emplacement that record mantle-TTG melt interactions. Based on a common tectonometamorphic evolution of the three subprovinces from ca. 2756 Ma, previous studies argued that the Mesoarchean TTG suites exposed in the La Grande and Opatica subprovinces represent a single crustal block. The sedimentary belts of the area were deposited in sagduction-type basins formed at ca. 2724-2706 Ma and, within less than 15-20 myr, were buried and metamorphosed up to granulite facies at 2697-2685 Ma during dip-slip-dominated D-2. The burial and the following exhumation of these rocks from ca. 2677 Ma may be attributed to the delamination of lower crustal residues, favoring interaction between mantle and TTG melts, and the formation of sanukitoids and anatectic S-type granites. Nd signatures of the 2646-2598 Ma I-type granitic intrusions indicate extensively reworking of TTGs due to crustal thickening during the D-3-D-4 events. Our study suggests that the Archean tectonic regime recorded in the southeastern Superior Province is the result of mantle plume tectonics. We conclude that the La Grande-Opatica boundary does not represent a major suture zone but rather but rather a fossil boundary within an older extensively reworked crustal block over which the metasedimentary rocks of the Nemiscau and La Grande subprovinces were deposited. (c) 2024 The Author(s). Published by Elsevier B.V. on behalf of International Association for Gondwana Research. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

The Franklin igneous event (ca. 718 Ma) emplaced basalts and mafic intrusions across Arctic Laurentia just prior to the onset of the ca. 717–661 Ma Sturtian Snowball Earth event. Given the close association in time between these two events, it has been widely argued that the Franklin event contributed to the initiation of global glaciation. However, a lack of accurate high-precision geochronology has hampered establishing the timeframe of Franklin magmatism and discerning its precise temporal and possible causative relationship to glaciation. Here we present new high-precision U-Pb CA-ID TIMS zircon ages for two dykes and two sills from Baffin Island, Canada, and Avannaata, northwestern Greenland, related to the Franklin event. Combined with field relationships showing that the dykes crosscut the sills, these four dates indicate magmatic activity over 1.10±0.74 Myr at ca. 718 Ma, immediately prior to Sturtian glaciation, which we estimate to have initiated at 717.19 +0.26/−0.33 Ma. Our results are consistent with recent high precision U-Pb CA-ID TIMS age estimates for the Franklin magmatic activity in the central and western parts of the province. Combining our new dates with the other high precision CA-ID-TIMS ages yields a duration for the Franklin event of 2.14±0.75 Myr which is shorter than the previous estimates but somewhat longer than that for typical Phanerozoic large igneous events.

The alkaline magmatism found in the Brazilian Equatorial Margin (BEM) in the Southwest Atlantic Ocean, such as that observed in Fernando de Noronha Archipelago, poses intriguing questions about its origin and its rela-tionship to guyots and onshore magmatism of similar alkaline compositions in northeast Brazil. The Fernando de Noronha Archipelago (FNA) exhibits a broad spectrum of alkaline magmatism, ranging from foiditic to phono-litic/trachytic compositions. At the Enseada da Caieira, a group of intrusions reflects this wide variety from FNA. This paper presents a complete description of these intrusions based on petrography, lithogeochemistry, and mineral and isotopic chemistry, as well as thermobarometry and petrogenetic modeling. The new data are compared with data compiled from the FNA, BEM onshore and offshore magmatism, and the Vit & PRIME;oria-Trindade Ridge (VTR). The intrusions are classified as trachyte, alkali-basalt/basanite, phonotephrite, and picrobasalt. The compositional diversity of dikes outcropping in a relatively small area suggests a complex petrogenetic evolution for the feeding system of the Fernando de Noronha Island. This is supported by the presence of porphyritic clinopyroxenes (for example) with compositional zoning, indicating multistage crystallization processes. Flow, resorption, and glomeroporphyritic textures are common. Skeletal crystals also occur as phenocrysts of olivine and clinopyroxene due to supercooling. Secondary minerals such as zeolites and carbonate commonly occur as fillers in amygdules. Values for & sigma;Nd range from +0.2 to +3.1. The Sr-Nd isotopic signatures suggest a mixture between an enriched component (EMII) and a depleted mantle component (DMM). A multi-approach thermo-barometer using clinopyroxene, amphibole, and zircon mineral chemistry reveals different stages for crystalli-zation, with pressure and temperature ranging from 320 to 1300 MPa and 750 to 1240 degrees C, respectively. The whole-rock lithogeochemistry modeling suggests a low degree of partial melting (around 2% or less) of an enriched source with variable proportions from spinel and garnet-lherzolite melting zones.

This paper presents a detailed review of the use of Sr-87/Sr-86 isotope systematics for wine provenance studies. The method is based on the principle that the Sr isotope ratio in wine reflects that of the labile fraction of the vineyard soil from which the wine is produced. The review encompasses Sr-87/Sr-86 data from wine samples published between 1993 and 2021 from terroirs in 22 different countries. The analytical procedures and techniques adopted by the different authors and the range of isotope ratios obtained in the different studies are discussed and evaluated. This study provides a bibliometric analysis of the Sr-87/Sr-86 isotope approach for wine authentication at different scales. Although limitations are evident when implemented at large (global) scales, we demonstrate that the Sr-87/Sr-86 isotope tracing technique remains a powerful and reliable tool for determining the geographical origin of wine when combined with detailed knowledge of the geological and soil characteristics of the substrata. For example, this combination of data allows the wines grown in the volcanic soils of Central and Southern Italy to be unambiguously fingerprinted. We present a detailed protocol for the application of the Sr isotope technique to wine authentication.

The Kipawa rare-earth element (REE) deposit is located in the Parautochton zone of the Grenville Province 55 km south of the boundary with the Superior Province.The deposit is part of the Kipawa syenite complex of peralkaline syenites, gneisses, and amphibolites that are intercalated with calc-silicate rocks and marbles overlain by a peralkaline gneissic granite.The REE deposit is principally composed of eudialyte, mosandrite and britholite, and less abundant minerals such as xenotime, monazite or euxenite.The Kipawa Complex outcrops as a series of thin, folded sheet imbricates located between regional metasediments, suggesting a regional tectonic control.Several hypotheses for the origin of the complex have been suggested: crustal contamination of mantle-derived magmas, crustal melting, fluid alteration, metamorphism, and hydrothermal activity.Our objective is to characterize the mineralogical, geochemical, and isotopic composition of the Kipawa complex in order to improve our understanding of the formation and the post-formation processes, and the age of the complex.The complex has been deformed and metamorphosed with evidence of melting-recrystallization textures among REE and Zr rich magmatic and post magmatic minerals.Major and trace element geochemistry obtained by ICP-MS suggest that syenites, granites and monzonite of the complex have within-plate A2 type anorogenic signatures, and our analyses indicate a strong crustal signature based on TIMS whole rock Nd isotopes.We have analyzed zircon grains by SEM, EPMA, ICP-MS and MC-ICP-MS coupled with laser ablation (Lu-Hf).Initial isotopic results also support a strong crustal signature.Taken together, these results suggest that alkaline magmas of the Kipawa complex/deposit could have formed by partial melting of the mantle followed by strong crustal contamination or by melting of metasomatized continental crust.These processes and origins strongly differ compare to most alkaline complexes in the world.Additional TIMS and LA-MC-ICP-MS analyses are planned to investigate whether all lithologies share the same strong crustal signature.

Assigning correct protolith to high metamorphic-grade core zone rocks of large hot orogens is a particularly important challenge to overcome when attempting to constrain the early stages of orogenic evolution and paleogeography of lithotectonic units from these orogens. The Gurla Mandhata core complex in NW Nepal exposes the Himalayan metamorphic core (HMC), a sequence of high metamorphic-grade gneiss, migmatite, and granite, in the hinterland of the Himalayan orogen. Sm-Nd isotopic analyses indicate that the HMC comprises Greater Himalayan sequence (GHS) and Lesser Himalayan sequence (LHS) rocks. Conventional interpretation of such provenance data would require the Main Central thrust (MCT) to be also outcropping within the core complex. However, new in situ U-Th/Pb monazite petrochronology coupled with petrographic, structural, and microstructural observations reveal that the core complex is composed solely of rocks in the hanging wall of the MCT. Rocks from the core complex record Eocene and late Oligocene to early Miocene monazite (re-)crystallization periods (monazite age peaks of 40 Ma, 25–19 Ma, and 19–16 Ma) overprinting pre-Himalayan Ordovician Bhimphedian metamorphism and magmatism (ca. 470 Ma). The combination of Sm-Nd isotopic analysis and U-Th/Pb monazite petrochronology demonstrates that both GHS and LHS protolith rocks were captured in the hanging wall of the MCT and experienced Cenozoic Himalayan metamorphism during south-directed extrusion. Monazite ages do not record metamorphism coeval with late Miocene extensional core complex exhumation, suggesting that peak metamorphism and generation of anatectic melt in the core complex had ceased prior to the onset of orogen-parallel hinterland extension at ca. 15–13 Ma. The geometry of the Gurla Mandhata core complex requires significant hinterland crustal thickening prior to 16 Ma, which is attributed to ductile HMC thickening and footwall accretion of LHS protolith associated with a Main Himalayan thrust ramp below the core complex. We demonstrate that isotopic signatures such as Sm-Nd should be used to characterize rock units and structures across the Himalaya only in conjunction with supporting petrochronological and structural data.

Soils are a crucial interface of Earth's Critical Zone, responsible for the biogeochemical cycling of mineral nutrients. While the sources of essential nutrients such as Ca (and Sr) in plants have been widely studied, the processes by which these nutrients are transferred from the soil to the plants is less clear. We present new evidence for systematic nutrient fractionation between soils, grapes and wines from five vineyards from the Quebec terroir (Canada) using the novel stable Sr (δ88/86Sr) isotope system. We coupled this approach with traditional radiogenic 87Sr/86Sr measurements on the same samples (bulk soils, labile fraction of these soils, whole grapes, and wines) from five vineyards from the Quebec terroir (Canada) to ensure that variations in δ88/86Sr values were provoked by processes involved in Sr transfer instead of mixing between different sources. The δ88/86Sr values generally decrease from the bulk to the labile fractions of the soils to the grapes. A decrease in the difference between the soil fractions (Δ88/86Srbulk-labile) with increasing δ88/86Sr values in the labile fraction is interpreted to reflect increasing pedogenic mineral precipitation and higher soil fertility. The depleted δ88/86Sr values of the grapes are consistent with a preferential uptake of lighter isotopes by plants. This effect is magnified in soils showing higher secondary mineral precipitation. An increase in the δ88/86Sr values from the grapes to the wines reflects the separation of the skin/seeds and the juice (pulp enriched in 88Sr) in the winemaking process. This mixing relationship is supported by a correlation between the Sr concentrations and the δ88/86Sr values of the wines and grapes. These findings suggest promising new applications of stable Sr isotopes values for studying soil fertility and the impact of nutrient availability for plant growth in agricultural ecosystems as well as the impact of the maceration processes in the production of wine.The overall similarity of 87Sr/86Sr ratios of the labile soil fractions, grapes and wines from the same vineyard support the hypothesis of a same Sr source, from the soil solution to its transfer to the grape and wine and confirm the potential of the 87Sr/86Sr ratios as a proxy for geographic provenance of wine.However, slightly lower 87Sr/86Sr ratios in the grape pulps (by 0.00040 on average compared to the skins and seeds) suggest that the sources of nutrients available for plant uptake vary during the vegetative cycle. The grape seeds and skins formed in the early growth cycle are characterized by rapid growth due to enhanced rhizosphere activity (enhanced mineral dissolution) providing higher nutrient levels. The enhanced mineral solubility results in higher 87Sr/86Sr ratios in the skin and seeds derived from enhanced dissolution of 87Sr-enriched silicate minerals. In contrast, the pulp develops later in the growth cycle when rhizosphere activity and mineral solubility is reduced, resulting in a lesser contribution from silicate minerals and thus reflect a higher proportion of dissolved carbonate contributing to the lower 87Sr/86Sr ratios of the pulps.

Significant proportions of debris containing pollutants are present in remote and unknown areas of the deep seabed.Although identified amongst the top threats to marine ecosystem and human health, the mechanisms that particulate materials entered rapidly these deep ocean systems are still matter of debate.This study use depicting radiogenic isotopes (Sr, Nd, Pb) to question the relationship between the seabed sediment contamination levels and ambient stratification in the North Atlantic Ocean.On this basis, we studied sedimentary inputs and related mechanisms from more recent sequences collected at three locations representing different deep-sea hydrodynamics along the Reykjanes Ridge.Sm-Nd concentrations, as well as Sm-Nd-Sr-Pb isotopic compositions, were determined in digested and purified fraction of the sediment cores by Thermal Ionization Mass Spectrometry (TIMS).The Sm-Nd-Sr-Pb data simply reflect the scale of the perturbation of upper part (0-15 cm) of the sequences, which is much more pronounced in east flank than crossing and west bordering ridge areas.The Pb-Pb systematics show that the intensity of water mass mixing modulates degree of contamination and induced the modal transport of detrital components.As consequence of ambient stratification in this region, two major transport processes of pollutant downwards to the sediments are proposed: (i) sediments entrainment in the eastern flank and over ridge axis primarily dominated by vertical flux of particulates controlled by repackage and dislocation by strong mechanical mixing; and (ii) in the west flank, advection of abyssal waters, due to well-stratified mixing layer, provides particulates from the NEADW1 and DSOW.

Plutonic rocks from the Mineiro Belt, Brazil record a delayed onset of the transition from TTG to sanukitoid-type magmatism (high Ba-Sr), starting during the Siderian magmatic lull when little juvenile magma was added to the continental crust. Rocks mostly belong to the calc-alkaline series, meta-to peraluminous and originally "I-type", meaning that oxidized magmas were formed by partial melting of subducted material. The temporal distribution and apparent secular changes of the magmas are consistent with the onset of subduction-driven plate tectonics due to an increase of the subduction angle and opening of the mantle wedge. New isotopic analyses (Sm-Nd whole rock and Lu-Hf in zircon) corroborate the restricted juvenile nature of the Mineiro Belt and confirm the genetic link between the Lagoa Dourada Suite, a rare ca. 2350 Ma high-Al tonalite-trondhjemite magmatic event, and the sanukitoid-type ca. 2130 Ma Alto Maranhao Suite. U-Pb dating of zircon and titanite constrain the crystallisation history of plutonic bodies; coupled with major and trace element analyses of the host rocks, they distinguish evolutionary trends in the Mineiro Belt. Several plutons in the region have ages close to 2130 Ma but are distinguished by the lower concentration of compatible elements in the juvenile high Ba-Sr suite. (C) 2018, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.

Radiogenic (87Sr/86Sr) and stable (δ88/86Sr) strontium isotope compositions spanning a calendar year are reported for rivers from across subarctic Canada that drain contrasting lithologies ranging from Precambrian bedrock (Koksoak, Great Whale and La Grande rivers of Northern Quebec) to carbonate and clastic Phanerozoic sedimentary rocks of the Western Interior Platform (Nelson River, of central and western Canada). The 87Sr/86Sr isotopic compositions of the river waters reflect the underlying geology, with rivers draining the Precambrian Shield having higher 87Sr/86Sr ratios (0.727–0.734) than the Phanerozoic dominated Nelson River (0.713). The stable strontium isotope values (δ88/86Sr) range from 0.26 to 0.39‰, with the values for the Nelson River overlapping those of the other three. Rivers that have not been developed for hydroelectric power show a seasonal variation in the 87Sr/86Sr ratios, whereas those that have been diverted or dammed show little or no seasonal variation due to increased residence time of their water in hydroelectric reservoirs. The three rivers from Northern Quebec show discrete ranges in their 87Sr/86Sr and δ88/86Sr isotope compositions that correlate with the Ca/Sr and Na/Sr ratios of the river water. These correlations are interpreted to reflect differential chemical weathering of felsic versus mafic source rocks and/or of surficial sediment vs bedrock sources.

The St-Honore carbonatite complex (565 Ma) and Crevier alkaline intrusion (957.5 Ma), both located in the Grenville Province, and the Shortt Lake carbonatite complex (2652 Ma), emplaced within the Superior Province, host significant REE deposits. In each igneous complex, the intrusive rocks and minerals have similar trace element geochemical signatures and Nd isotopic compositions, suggesting that in each intrusion the different lithofacies have a genetic link. In addition, the epsilon Ndt values of the St-Honore carbonatite, syenite, and carbonate (+3.2 to +3.8), Crevier carbonatite and syenite (+1.8 to +2.6), and Shortt Lake syenite and diorite (+1.1 to +1.5) indicate mixing between enriched crustal sources and depleted mantle sources. Together, the geochemical and isotopic data suggest that the St-Honore, Crevier, and Shortt Lake alkaline complexes crystallized from magmas derived from a depleted mantle source that have undergone crustal contamination by local country rocks during their ascent toward the surface.

Together, the Rio Preto and Riacho do Pontal belts form a 600 km-long orogenic system developed along the northwestern and northern margins of the Sao Francisco craton during the Neoproterozoic Brasiliano orogeny. Involving the Paleoproterozoic (similar to 1.9 Ga) Formosa Formation (schist, quartzite, greenschist and amphibolite) and the Neoproterozoic (900-600 Ma) Canabravinha Formation (metadiamictite, metawacke, metaturbidite), the Rio Preto fold belt, exposed in Bahia and Piaui states, borders the craton to the northwest. Neoproterozoic deformation between 600 and 540 Ma originated a complex, asymmetrical and double-verging thrust wedge, whose southern branch propagated for over 100 km into the craton interior in form of a thin-skinned deformation front. The Rio Preto belt probably represents an inverted Neoproterozoic hemi-graben developed along the northern margin of the craton. The Riacho do Pontal fold belt occupies the northern margin of the craton. Its external zone is made up of a south-verging thin-skinned nappe system detached along the basement-cover contact. Ages of syn-to late-collisional granitic intrusions suggest that the main deformation phase in the Riacho do Pontal belt occurred between 667 and 555 Ma. The Barra Bonita Formation (quartzite, schist and marble), a correlative of the Una Group in craton interior (Paramirim aulacogen), represents a platformal unit, deposited on the northern Sao Francisco passive margin. The Monte Orebe metabasalts, exposed further north in the central sector of the belt, might represent remnants of a Neoproterozoic oceanic crust.

Stratigraphic, isotopic, and geochronological data from two late Neoproterozoic-aged conglomerate wedges in the southwest Sao Francisco craton support the interpretation that the Ediacaran Bambui Group in east-central Brazil was deposited in a foreland basin. The Sambura Formation forms the base of the Bambui Group in the southwestern part of the Bambui basin and was deposited synchronously with the Brasilia orogeny. It is interpreted to be a sedimentary product of a retrogradational coastal alluvial fan system deposited in an underfilled flexural foredeep during the early stages of foreland basin development sometime between 630 and 560 Ma. The basal Sete Lagoas Formation carbonates were deposited towards the cratonic margin on the forebulge, which provided an ideal environment for carbonate production. The lateral relationship between the Sambura and Sete Lagoas formations further implies that an unconformity was generated by foreland flexure, and that this unconformity separates an early Ediacaran phase of the foreland basin from a late Ediacaran phase. The Lagoa Formosa Formation was deposited in the latter phase, after peak orogenesis, with a provenance that includes post-orogenic granites and zircons as young as 560 Ma. It records a prograding turbidite fan system in the Lagoa Formosa Formation that was deposited during orogenic unroofing and basin-wide shallowing in a filled stage of the foreland basin. A shift from highly enriched delta C-13 values towards global-like carbon isotopes values in carbonates within the Lagoa Formation, in conjunction with the occurrence of banded iron formation, may suggest deposition in a basin with anoxic and ferruginous deep waters in the Bambui basin in the latest Ediacaran.