A
Alcides N. Sial
Researcher at Universidade de Pernambuco
Publications - 8
Citations - 178
Alcides N. Sial is an academic researcher from Universidade de Pernambuco. The author has contributed to research in topics: Sedimentary depositional environment & Aggradation. The author has an hindex of 6, co-authored 8 publications receiving 163 citations.
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Journal ArticleDOI
Chemostratigraphy of Carbonates from the Minas Supergroup, Quadrilátero Ferryífero (Iron Quadrangle), Brazil: A Stratigraphic Record of Early Proterozoic Atmospheric, Biogeochemical and Climactic Change
Andrey Bekker,Alcides N. Sial,Juha A. Karhu,V. P. Ferreira,C. M. Noce,Alan J. Kaufman,A. W. Romano,Márcio Martins Pimentel +7 more
TL;DR: The ca. 2.42 Ga-old Gandarela Formation overlies the finely laminated Caue Banded Iron Formation (BIF) of the Itabira Group, Minas Supergroup, Brazil and consists of red carbonate facies BIF grading up into buff dolomites and limestones, which are locally stromatolitic.
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Multiproxy studies of Early Miocene pedogenic calcretes in the Santa Cruz Formation of southern Patagonia, Argentina indicate the existence of a temperate warm vegetation adapted to a fluctuating water table
M. Sol Raigemborn,M. Sol Raigemborn,Verónica Krapovickas,Elisa Beilinson,Elisa Beilinson,Lucia Gómez Peral,Lucia Gómez Peral,Alejandro Fabián Zucol,Luciano Zapata,Luciano Zapata,M. Richard F. Kay,M. Susana Bargo,Sergio F. Vizcaíno,Sergio F. Vizcaíno,Alcides N. Sial +14 more
TL;DR: In this paper, the authors performed a multiproxy study of pedogenic calcretes examining abiotic and biotic components, and found that the calcrete exhibits a variety of morphologies (horizontal and vertical rhizoliths, laminar structure, nodules, massive crusts), microfabrics (Beta- predominant over Alpha-microfabrics), and fluctuate within each morphotype and throughout the analysed interval.
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C and Sr isotopic evolution of carbonate sequences in NW Argentina: Implications for a probable Precambrian-Cambrian transition
Alcides N. Sial,V. P. Ferreira,Alejandro J. Toselli,Florencio Gilberto Aceñolaza,Márcio Martins Pimentel,Marcela Alejandra Parada,Ricardo N. Alonso +6 more
TL;DR: In this article, the authors show that the Las Tienditas carbonates of the La Laja Fm. show a gradual decrease from the base (+3.4 ‰PDB) to the top with a minimum of −1.6‰ observed at ∼15m from the top.
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Preglacial palaeoenvironmental evolution of the Ediacaran Loma Negra Formation, far southwestern Gondwana, Argentina
Lucía E. Gómez-Peral,Alan J. Kaufman,Maria Julia Arrouy,Sebastián Miguel Richiano,Alcides N. Sial,Daniel Gustavo Poire,Valderez P. Ferreira +6 more
TL;DR: The Loma Negra Formation (LNF) is the uppermost unit of the Sierras Bayas Group and has been extensively studied in the literature as mentioned in this paper, showing consistent carbon and oxygen isotope trends that may be useful for detailed intrabasinal correlations.
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Rare earth elements and stable isotope geochemistry of carbonates from the mélange zone of Manipur ophiolitic Complex, Indo-Myanmar Orogenic Belt, Northeast India
TL;DR: In this paper, rare earth element (REE) contents (51 ppm average value) in the MOC carbonates are high compared with the average value of typical marine carbonate (~28 ppm).