Journal of South American Earth Sciences最新文献

{"title":"Pervasive crustal reworking along the proto-Andean margin of northern Peru and southern Ecuador: Insights from U-Pb, geochemical, and isotopic analyses of zircon","authors":"Sandoval Espinel Leidy Carolina ,&nbsp;Witt Cesar ,&nbsp;Zattin Massimiliano ,&nbsp;Poujol Marc ,&nbsp;Bruguier Olivier ,&nbsp;Chiaradia Massimo ,&nbsp;Bermudez Mauricio","doi":"10.1016/j.jsames.2025.105502","DOIUrl":"10.1016/j.jsames.2025.105502","url":null,"abstract":"<div><div>Continental growth at convergent margins is the result of complex interactions between mantle additions and crustal reworking. This study examines the pre-Andean tectono-magmatic evolution of the central-northern Andean margin (∼1°S to ∼6°S) using U-Pb geochronology, trace element analysis, and εHf_(t) and δ¹⁸O isotopic data from zircons embedded within detrital and bedrock samples. U-Pb dating revealed two primary clusters: a Late Neoproterozoic population (640–550 Ma) associated with the Brasiliano/Pan-African orogeny and a Permian–Triassic population (280–200 Ma) associated with the Gondwanides orogeny. There were also two minor clusters at ∼960 Ma and ∼345 Ma. Zircon grains dating between 1000 and 200 Ma crystallized during repeated episodes of crustal reworking, characterized by highly evolved εHf_(t) signatures (−10 to −30) at 640–510 Ma that are indicative of ancient Amazonian cratonic sources, with no evidence of Pampean or Famatinian contributions. The results also show a marked increase in juvenile input during the Carboniferous (380–310 Ma), followed by predominantly continental input as indicated by persistently high δ¹⁸O values up to 220 Ma. Although the U-Pb age spectra of these samples are similar to that of the central Andes, isotopic and geochemical data reveal that the central-northern Andean margin evolved within a tectonic context that is more closely aligned with central-eastern Gondwana (i.e., central Africa and eastern South America) rather than typical Andean settings.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105502"},"PeriodicalIF":1.7,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Permian rifting in the San Rafael, Las Matras, and Chadí Leuvú blocks, Argentina, revealed by P-T-t-d evolution of A-type magmatism","authors":"Daniel A. Gregori ,&nbsp;Melisa Angeletti ,&nbsp;Laura E. Grecco ,&nbsp;María C. Frisicale ,&nbsp;Luis V. Dimieri","doi":"10.1016/j.jsames.2025.105497","DOIUrl":"10.1016/j.jsames.2025.105497","url":null,"abstract":"<div><div>The López Lecube Stock, located in the SW part of the Buenos Aires Province, is formed by syenite and monzogranite dikes, composed of quartz, K-feldspar, plagioclase, biotite, hornblende, and clinopyroxene with granular magmatic and solid-state deformation textures. The stock is an A-type granite placed in a strike-slip continental rift. There are three magmatic stages: first corresponds to emplacement and ascent from the upper mantle to the lower continental crust; second, dikes injection; and third, body emplacement in the middle-upper continental crust at 258-255 Ma.</div><div>This body belongs to an NW-SE belt of Permian intrusive and volcanic rocks north of the Huincul Fault Zone, in the San Rafael, Las Matras, and Chadí Leuvú blocks. It is temporally equivalent to the NW-SE magmatic belt located south of the Huincul Fault Zone in the Rio Negro Province.</div><div>Both systems represent tensile structures formed during the movement of the Huincul Fault Zone, triggering the development and emplacement of these intrusive and volcanic Gondwana rocks.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"159 ","pages":"Article 105497"},"PeriodicalIF":1.7,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The NE-SW Axaxalpa fault system in the eastern sector of the Transmexican Volcanic Belt: Kinematics, geometry, and recent activity","authors":"Alberto Vásquez Serrano ,&nbsp;Elizabeth Rangel Granados ,&nbsp;Amelia Díaz Corte ,&nbsp;Cristal Esqueda Maldonado ,&nbsp;José Luis Arce Saldaña ,&nbsp;Michel Fernanda Olvera Rosiles","doi":"10.1016/j.jsames.2025.105505","DOIUrl":"10.1016/j.jsames.2025.105505","url":null,"abstract":"<div><div>The Axaxalpa fault system (AFS), located in the eastern sector of the Transmexican Volcanic Belt (TMVB), consists of NE-SW oriented faults that record two deformation events. The oldest event (D1) corresponds to faults with left strike-slip kinematics, which were active during the late Miocene. These faults cutiddle-late Miocene volcanic structures in the northern zone of the eastern sector of the TMVB and are likely associated with intrusive bodies along their trace. The second event (D2) is related to the normal movement of the NE-SW faults. This activity started in the Pliocene and continued into the Holocene. The fault-slip data inversion of the faults located in the southern zone of the AFS for the D2 suggests that the main stress directions are 131°/59° (trend/dip), 223°/01°, and 314°/31° for σ₁, σ₂, and σ₃ respectively, and stress ratio R = (σ2- σ3)/(σ1- σ3) = 0.44. In the northern sector, the main stress directions are 292°/76°, 047°/06°, 138°/12° for σ₁, σ₂, and σ₃ respectively, and stress ratio R = 0.45. The mesoscopic fractures associated with D2 are mainly extensional and hybrid and have three orientations: NE-SW, NNW-SSW, and ∼E-W. Additionally, the morphological lineaments primarily show a NE-SW orientation, with subordinate NW-SE and ∼E-W orientations. The D2 event controls the volcanic vent's location and forms monogenetic volcanic lineaments parallel to the NE-SW faults.</div><div>Based on the AFS orientation, it is clear that this fault system is incompatible with the field stress recorded in the TMVB. This fact suggests that the AFS is probably related to a reactivated basement structure inside of a tridimensional deformation with a complex deformation history. In the southern zone of the eastern sector of the TMVB, the Cretaceous Papalutla fault probably represents the continuation of the AFS.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105505"},"PeriodicalIF":1.7,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Segmented flat-slab Caribbean subduction beneath northernmost South America from teleseismic receiver function imaging","authors":"Miguel Alzate,&nbsp;Gaspar Monsalve,&nbsp;Agustín Cardona","doi":"10.1016/j.jsames.2025.105501","DOIUrl":"10.1016/j.jsames.2025.105501","url":null,"abstract":"<div><div>Segments of the southwestern portion of the Caribbean Plate are subducting beneath northern Colombia at a low angle. Using the teleseismic receiver function technique, we were able to image this shallowly subducting Caribbean Plate, in the vicinity of the highly elevated Santa Marta Massif, a singular topographic feature in the Caribbean coast of Colombia. Two major wave conversions across different broadband seismological stations have been interpreted as the continental and oceanic crust–mantle boundaries (Moho), corresponding to the overriding continental South American Plate and the shallowly subducting oceanic Caribbean Plate. A convergence–parallel cross section reveals that at less than ∼100 km from the coastline, a continental Moho conversion is absent, and an oceanic Moho is suggested at depths between ∼40 and 80 km beneath the surface, getting progressively deeper towards the continental interior. At greater distances from the coastline, two Mohos can be identified, defining a subduction angle of ∼11° along a distance of at least 150 km, before the slab sinks beneath the Maracaibo Block in Venezuela. A convergence–oblique cross section shows the segmented nature of the Caribbean Plate in the coastal area of northernmost Colombia, where the west-east striking Oca-Ancón Fault acts as a boundary between a shallowly subducting segment to its south, and an underthrusting segment to its north.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105501"},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Central Andes of South America: A review of its tectono-magmatic evolution","authors":"Daniel Bertin ,&nbsp;Emilce Bustos ,&nbsp;Pablo Grosse ,&nbsp;Walter Báez","doi":"10.1016/j.jsames.2025.105503","DOIUrl":"10.1016/j.jsames.2025.105503","url":null,"abstract":"<div><div>The Central Andes is a long-lived orogenic belt along the western margin of South America that includes the Central Volcanic Zone and two long-lived flat-slab segments, encompassing more than 3500 km between ∼5 and 33°S. The Central Andes has been the place of several outstanding geological processes since at least the latest Triassic (∼200 Ma), with the main development of the orogen taking place during the Eocene-Oligocene (45-25 Ma). In this contribution, we review and discuss the processes that have shaped and defined the crustal architecture of the Central Andes. We particularly highlight the role played by shallowing-steepening subduction cycles in controlling the tectono-magmatic evolution of the orogen, track the location of the current deformation front and the distribution of the stress field, and identify the regions where future high-flux magmatic episodes are most likely.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105503"},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"U-Pb and Lu-Hf zircon analysis in orogenic basins - A case study in a hot orogen, SE Brazil","authors":"Sofia Goldbach D'Orsi ,&nbsp;Renata da Silva Schmitt ,&nbsp;Silvia Regina de Medeiros ,&nbsp;Mauro Cesar Geraldes ,&nbsp;Guilherme Gonçalves Martins","doi":"10.1016/j.jsames.2025.105499","DOIUrl":"10.1016/j.jsames.2025.105499","url":null,"abstract":"<div><div>During the convergence of the São Francisco and the Congo-Angola paleocontinents, between 600 and 500 Ma, sedimentary basins were generated and metamorphosed to paragneisses within the Ribeira Orogen, SE Brazil. The Oriental Terrane, part of this orogen, and the focus of this study, is constituted of paragneisses intruded by voluminous pre-, syn- and post-orogenic batholiths. Here, we investigate the origin of the paragneisses that crop out in the city of Rio de Janeiro. The São Fidélis Group consists mostly of cordierite-sillimanite-garnet-biotite paragneisses with minor quartzite layers at granulite facies. Peak metamorphic conditions are estimated at 850 °C and 7 kbar. Our goal is to study the provenance of the protoliths and the basin's tectonic evolution, using a combination of U-Pb and Lu-Hf methods in zircons, even though these rocks underwent metamorphism above the zircon closure temperature for the U-Pb system. Fieldwork was conducted at Niemeyer Avenue and Morro Cara de Cão. Three samples from distinct lithologies were analyzed: a cordierite-sillimanite-garnet-biotite paragneiss (kinzigite), a fine-grained biotite paragneiss, and a quartzite. All samples show similar detrital zircon populations, with predominant Neoproterozoic sources and minor Mesoproterozoic and Paleoproterozoic sources. The older populations might come from African sources, such as the Kunene Anorthosite Complex and the Eburnean magmatic units of the Angola Craton and the Cabo Frio Tectonic Domain. The main Neoproterozoic populations are 980-930 Ma, 856-838 Ma, 800-740 Ma, and 690-580 Ma. These peaks coincide with the ages of the magmatic arcs described in the Oriental Terrane, suggesting them as sources. The Neoproterozoic εHf values for the dated detrital zircons range from +5 to −18, which corroborates with magmatic arc nature of these sources. The youngest detrital zircon population (590-570 Ma) could be either interpreted as metamorphic or magmatic due to Pb-loss caused uncertainties. Therefore, we propose that the maximum age of sedimentation is a time interval of 590-570 Ma and the minimum age is about 560 Ma (age of the metamorphic rims and of the Facoidal Orthogneiss syntectonic intrusion). The short period between initiation of sedimentation and metamorphism, 590-560 Ma, suggests a syn-orogenic basin, related to an arc terrane (Oriental Terrane), either a back-arc or an intra-arc basin. This period coincides with the regional metamorphism in this hot orogen.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105499"},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An overview of Rhyacian continental magmatic arcs of the southeastern Guiana Shield, Amazonian Craton","authors":"Lúcia Travassos da Rosa-Costa ,&nbsp;Jean-Michel Lafon ,&nbsp;João Marinho Milhomem Neto ,&nbsp;João Alberto Evangelista Pinto","doi":"10.1016/j.jsames.2025.105504","DOIUrl":"10.1016/j.jsames.2025.105504","url":null,"abstract":"<div><div>The southeastern Guiana Shield comprises an extensive orogenic belt formed during the Rhyacian period. In its Brazilian portion (Amapá and northwestern Pará), this belt includes the Rhyacian Carecuru and Lourenço domains, which are located to the north and south of the Amapá Block, an Archean terrane that was significantly reworked during the Rhyacian orogeny. This paper provides an overview of field, petrographic, geochemical, isotopic, and geochronological data supporting the recognition of continental magmatic arcs that developed during a long-lived (∼170 Ma) evolution of the accretionary stage of the Rhyacian orogeny. In the Lourenço Domain, arc magmatism persisted from 2.26 to 2.09 Ga, while in the Carecuru Domain, it spanned from 2.19 to 2.14 Ga. The studied arc-related rocks mainly consist of calc-alkaline to high-K calc-alkaline granitoids and gneisses, most of which are metaluminous, I-type, and have high contents of large-ion lithophile elements (LILE). The Archean crustal contributions to the origin of the magmas have significantly shaped their isotopic signatures, highlighting the influence of the nearby Amapá Block. The magmatic evolution in Lourenço and Carecuru domains was marked by episodic flare-ups around 2.19–2.18 Ga and 2.14 Ga, indicating periods of intensified activity typical of continental arc systems. This dynamic evolution resembles tectonic settings with long-lived arc magmatism punctuated by episodes of increased activity. Overall, the data suggest that the Rhyacian orogeny in this part of the Amazonian Craton involved tectonic processes similar to those of modern plate tectonics, characterized by prolonged arc magmatism, episodic flare-ups, and crustal interactions, pointing to a complex tectonic environment.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"159 ","pages":"Article 105504"},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and geomorphological evolution of palm swamp system in the northernmost Amazon","authors":"Raquel Araújo Alves ,&nbsp;Cristiane Valéria de Oliveira ,&nbsp;Valdinar Ferreira Melo ,&nbsp;Samuel Rodrigues Ribeiro","doi":"10.1016/j.jsames.2025.105500","DOIUrl":"10.1016/j.jsames.2025.105500","url":null,"abstract":"<div><div>Palm swamp phytophysiognomy in the northernmost Amazon is evident by small valleys settled in deficit-drained areas in a region dominated by savannas. The limited number of studies on this ecological system has led to the assumption that groundwater exudation, conditioned by the subsurface and surface hydrological regimes, results in their establishment. The aim of the research was to investigate the evolution of palm swamp areas in the Amazon region. Thus, we hypothesized that the palm swamps are the product of the variability of the accumulated pulses in the region, represented by the alternation of allochthonous sedimentation processes originating from slope erosion with autochthonous conditions of pedological and climatic stability that allowed the bioconstruction of the bogs. To investigate palm swamp evolution, this study was based on a survey of images from remote sensors and fieldwork integrated into chronological data (OSL/SAR) and textural analyses of the sediment. The integration of field data and remote sensors indicated that palm swamps occurred mainly in the accumulation models, with predominantly sandy geo-covers, corresponding to the material sandstone resulting from the pedogenization of a pre-weathered mantle from the Boa Vista Formation. The absolute dating results indicated that palm swamps developed in different phases during the Late Holocene, between OSL/SAR = 2160 years before the present (BP) and OSL/SAR = 520 years BP, which correlated with wet regional events. The rise of palm swamps would be in response to the new conditions of the spatial arrangement imposed by the relief setting and the increase in humidity conditions that allowed the formation of peat bogs during periods of biostasis.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105500"},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term influence of Miocene intermontane basin alluvial sediments capture in arid valley thalwegs morphometry in the Central Andes (∼29°S)","authors":"Germán Aguilar ,&nbsp;Katia Rossel ,&nbsp;Albert Cabré ,&nbsp;María Pía Rodríguez","doi":"10.1016/j.jsames.2025.105498","DOIUrl":"10.1016/j.jsames.2025.105498","url":null,"abstract":"<div><div>Landscape evolution models suggest that thalweg morphometry is influenced by a combination of factors, including the rate of rock uplift, the soil erodibility, the channel geometry, the sediment properties and availability, and the climate changes. Approximately 6 Ma ago, the uppermost catchment of the El Transito river (∼29°S, Central Andes) captured an intermontane basin containing thick alluvial successions dating 19 to 13 Ma. We carried out an analysis of thalweg profiles to explore morphometric changes by this intermontane basin capture. The valleys that captured this basin exhibit flat profiles, with stationary knickpoints located at the basin boundaries. We propose that the supply of alluvial gravels from the intermontane basin shielded the thalweg upstream, reducing incision, while simultaneously providing abrasive material that favored incision downstream. Our findings underscore the importance of considering the long-term influence of sedimentary deposits capture when interpreting the morphometry of arid valleys in the Central Andes.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105498"},"PeriodicalIF":1.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of source terranes of beach sediments from the NW Gulf of Mexico, Atlantic ocean: Constraints from geochemistry and U–Pb detrital zircon geochronology","authors":"Mayank Shukla ,&nbsp;Sanjeet K. Verma ,&nbsp;John S. Armstrong-Altrin ,&nbsp;Mayla A. Ramos-Vázquez ,&nbsp;Sumit Mishra ,&nbsp;Elson P. Oliveira ,&nbsp;Eduardo González-Partida ,&nbsp;Héctor Hernández-Mendoza ,&nbsp;Vivek P. Malviya","doi":"10.1016/j.jsames.2025.105496","DOIUrl":"10.1016/j.jsames.2025.105496","url":null,"abstract":"<div><div>This study investigated mineralogy and bulk sediment geochemistry of 24 sediment samples, and U-Pb ages of 200 zircons retrieved from the Tamiahua beach, NW Gulf of Mexico. The study aims to infer the provenance and possible source terranes supplying sediments to the beach area. The XRD and SEM-EDS studies reveal that the sediments are associated with quartz, plagioclase, calcite, and microcline. The Chemical Index of Weathering (CIW'), Th/U and Ba/Sr ratios (&gt;92, 3.75, and 2.27, respectively) indicate high intensity of weathering in the source region. The major as well as trace element-based diagrams along with elemental ratios of TiO₂/Zr (∼15–35), Al₂O₃/TiO₂ (∼120–312), La/Sc (5.31–6.01), La/Co (4.27–5.64), Th/Sc (0.96–1.06), and Cr/Th (3.04–16.24) suggest that the sediments are derived from felsic rocks.</div><div>The Th/U ratios of Tamiahua zircons indicate an igneous origin. The chondrite normalized rare earth elements (REE) patterns exhibit positive Ce and negative Eu anomalies and are depleted in light rare earth elements (LREE) and enriched in heavy rare earth elements (HREE). The sediments are dominated with Proterozoic Eon (Mesoproterozoic; 1053.95–1502.36 Ma), Mesozoic Era (Jurassic; 145.42–179.19 Ma and Cretaceous; 68.84–124.45 Ma), and Cenozoic Era (Eocene; 34.08–54.21 Ma and Oligocene; 25.39–33.71 Ma) zircons indicating their derivation from heterogenous source. The Proterozoic zircons in Tamiahua beach sediments are possibly contributed by the Mesa Central Province, which contains zircons from Chiapas and Oaxacan Massif complexes as well as Granjeno schist and Tamatán group from Sierra Madre Oriental Province. Mesozoic zircons are likely contributed by multiple sources, including undifferentiated turbidites of Mesa Central and Zacatecas, Caracol, San Felipe formations and Huizachal group of Sierra Madre Oriental and from Eastern Alkaline Provinces. Similarly, the Cenozoic zircons are supplied by the felsic to intermediate volcanic rocks and granitoids from the Mesa Central Province. The sediment transport and distribution to the beach area is facilitated by the rivers and their tributaries that flow from the source terranes. The results of this study also reveal a passive margin setting for the northwestern Gulf of Mexico.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"158 ","pages":"Article 105496"},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}