Article
Geosciences, Multidisciplinary
Eben Blake Hodgin, Juan Carlos Gutierrez-Marco, Jorge Colmenar, Francis A. Macdonald, Victor Carlotto, James L. Crowley, Justin R. Newmann
Summary: This study provides detailed insights into the tectonic and evolutionary history of the Eastern Cordillera in Peru, with important evidence related to the accretion of the Arequipa Terrane. It sheds light on the early Paleozoic tectonic history of the region and presents a new tectonic model explaining the late Neoproterozoic to early Cambrian collision events.
Article
Geochemistry & Geophysics
H. S. Moghadam, Q. L. Li, M. Kirchenbaur, D. Garbe-Schoenberg, F. Lucci, W. L. Griffin, G. Ghorbani
Summary: The study reveals that collisional magmatism in the NE Iran back-arc began around 24 million years ago, with magmatism starting as early as the Late Cretaceous and continuing until the Pleistocene. The collisional igneous rocks exhibit bimodal characteristics, with significant isotopic differences between basaltic-andesitic and dacitic-rhyolitic components, suggesting a role of fractional crystallization and assimilation-fractional crystallization in the genesis of felsic rocks. Trace element and isotopic modeling point to triggers of magmatism in NE Iran being a depleted to enriched mantle and the Cadomian continental crust of Iran, with temporal magmatic variations observed from Late Cretaceous to Pleistocene.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Paleontology
Francois Pujos, Martin R. Ciancio, Analia M. Forasiepi, Michel Pujos, Adriana M. Candela, Barbara Vera, Marcelo A. Reguero, Ana Maria Combina, Esperanza Cerdeno
Summary: The late Oligocene mammalian fauna of Quebrada Fiera is diverse, featuring 13 endemic xenarthran species including sloths and armoured cingulates. The vertebrate fauna suggests a mix of endemic and high latitude species, indicating a varied ecosystem under a temperate or hot climate in late Oligocene South America.
PAPERS IN PALAEONTOLOGY
(2021)
Article
Multidisciplinary Sciences
Noelia S. Bedoya-Perales, Elias Escobedo-Pacheco, Diogo Maus, Alisson Neimaier, Guilherme Pumi
Summary: This study presents the first dataset on the accumulation of heavy metals and metal(loid)s in food crops and agricultural soils in a typical mining region in Peru. The dataset includes samples from diverse geographical regions and altitudes. It can be used for agricultural and food safety studies, as well as for monitoring pollution changes and comparing with other mining-influenced farmlands.
Article
Geosciences, Multidisciplinary
Julia Corradino, Alex Pullen, Andrew L. Leier, David L. Barbeau, Howie D. Scher, Amy Weislogel, Austin Bruner, Dale A. Leckie, Lisel D. Currie
Summary: The Bell River hypothesis suggests the existence of a transcontinental river in northern North America during the Cenozoic Era. Researchers have analyzed detrital zircon grains and marine shell fragments to support this hypothesis and understand its implications for Labrador Sea circulation and chemistry.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geology
Zhenchao Ye, Jingwen Mao, Minjie Lu, Xiaosan Zhu, Nian Chen, Hantao Wei, Wenqiang Jin, Xuyang Meng
Summary: The Don Javier porphyry Cu-Mo deposit is located in the Yarabamba district of the Arequipa region, Peru. The mineralized zone measures approximately 500 meters in width by 800 meters in length and formed between approximately 60.5 and 59.6 million years ago, possibly overlaid by later hydrothermal activity in the Eocene.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
T. N. Lamont, M. P. Searle, B. R. Hacker, Kyi Htun, Kyaw Min Htun, C. K. Morley, D. J. Waters, R. W. White
Summary: The Mogok Metamorphic Belt in Myanmar is a polymetamorphic terrane with mainly marbles and calc-silicates hosting spinel, ruby, and sapphire. The rocks show evidence of multiple metamorphic events, with core samples from the Kyi-Tauk-Pauk gold mine consisting mainly of garnet, biotite, and sillimanite gneisses. Monazite data suggest a high-grade granulite event followed by an upper amphibolite sillimanite-grade event, with a change in monazite chemistry indicating fluid/melt interaction and garnet breakdown.
Article
Geosciences, Multidisciplinary
B. Duncan, R. McKay, R. Levy, T. Naish, J. G. Prebble, F. Sangiorgi, S. Krishnan, F. Hoem, C. Clowes, T. Dunkley Jones, E. Gasson, C. Kraus, D. K. Kulhanek, S. R. Meyers, H. Moossen, C. Warren, V Willmott, G. T. Ventura, J. Bendle
Summary: The Cenozoic evolution of the Antarctic ice sheets is influenced by both changes in radiative forcing and tectonic evolution. This study presents an Antarctic compilation of Cenozoic upper-ocean temperature and reveals a correlation between ocean temperature, atmospheric carbon dioxide, and oxygen isotopes. The retreat of the West Antarctic Ice Sheet during the late Oligocene was primarily caused by a tectonically driven marine transgression. The expansion of marine ice sheets occurred when ocean temperatures further cooled during the Oligocene-Miocene transition.
Article
Geography, Physical
Pierre-Olivier Antoine, Johan Yans, Angelica Aliaga Castillo, Narla Stutz, M. Alejandra Abello, Sylvain Adnet, Michele Andriolli Custodio, Aldo Benites-Palomino, Guillaume Billet, Myriam Boivin, Fabiany Herrera, Carlos Jaramillo, Camila Martinez, Federico Moreno, Rosa E. Navarrete, Francisco Ricardo Negri, Francisco Parra, Francois Pujos, Jean-Claude Rage, Ana Maria Ribeiro, Celine Robinet, Martin Roddaz, Julia Tejada-Lara, Rafael Varas-Malca, Roberto Ventura Santos, Rodolfo Salas-Gismondi, Laurent Marivaux
Summary: The study focused on investigating the late Eocene-earliest Oligocene stratigraphic section in Shapaja, Peruvian Amazonia, utilizing chemostratigraphy and paleontological analysis to understand the Eocene-Oligocene Transition and climatic events in the region. The research revealed significant changes in sedimentary deposits and biodiversity, offering insights into environmental shifts during this transitional period.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Biotechnology & Applied Microbiology
Cesar Augusto Napa-Almeyda, Celia Criado, Jhony Mayta-Hancco, Marcial Silva-Jaimes, Luis Condezo-Hoyos, Maria Angeles Pozo-Bayon
Summary: The study aimed to isolate and characterize non-Saccharomyces yeast strains (NSYSs) from grapes used for pisco production in Peru, as well as to characterize the volatile compounds and sensory attributes of pisco made from these grapes. Different NSYSs were found on the skin of aromatic and non-aromatic grapes, which showed different abilities in various fermentation-related activities. Pisco made from these grapes also had different volatile profiles, and sensory analysis revealed distinct attributes for each type of pisco.
FERMENTATION-BASEL
(2023)
Article
Geochemistry & Geophysics
Suzanna H. A. van de Lagemaat, John A. Mering, Peter J. J. Kamp
Summary: This study documents the geochemistry of calcite veins in the Late Cretaceous Tikihore Formation in New Zealand, providing insights into their fluid composition and source. The results suggest that subduction initiation at the Hikurangi margin of the Australia-Pacific plate boundary likely occurred around 30-27 Ma, based on the U-Pb age of the vein calcite and modeling of apatite fission track data.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Paleontology
Santiago Hernandez Del Pino, Federico D. Seoane, Esperanza Cerdeno
Summary: This study focuses on the Oligocene mammals from Quebrada Fiera in Argentina and provides new anatomical data and taxonomic decisions on three families of typotherian notoungulates. The researchers present a detailed description of the skulls of Prohegetotherium schiaffinoi, provide new information on other species within Hegetotheriidae, record several ontogenetic stages of Archaeohyrax suniensis, and suggest the presence of a new Interatheriinae species at Quebrada Fiera.
ACTA PALAEONTOLOGICA POLONICA
(2022)
Article
Geosciences, Multidisciplinary
Chao Fu, Xinghe Yu, Shunli Li, Zixiao Peng, Shi Shi
Summary: The study integrated multiple indices to reconstruct the paleo-water depth distribution and paleo-sea level in the Ordos Basin, showing that the second-order transgression/regression cycles were mainly influenced by local variations in sediment supply and regional uplift. The sediment provenance area was estimated using detrital zircon U-Pb data and REE content, indicating a shift from the uplifted Helan Mountain in the Carboniferous to multi-sourced detrital material from the Yinshan range and Qinling range in the middle Permian.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Francis J. Sousa, Stephen E. Cox, Sidney R. Hemming, E. Troy Rasbury, Elena Steponaitis, Kevin Hatton, Mae Saslaw, Gregory Henkes, Patricia Princehouse, Natasha S. Vitek, Isaiah Nengo
Summary: New field observations and geochronology have revealed that the Topernawi Formation in the Ekitale Basin of northern Turkana Depression in Kenya is the oldest dated syn-rift sedimentary unit from the Oligocene.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Multidisciplinary Sciences
Chun-Sheng Jin, Deke Xu, Mingsong Li, Pengxiang Hu, Zhaoxia Jiang, Jianxing Liu, Yunfa Miao, Fuli Wu, Wentian Liang, Qiang Zhang, Bai Su, Qingsong Liu, Ran Zhang, Jimin Sun
Summary: Based on a geological record from the Nima Basin, it is shown that the South Asian monsoon (SAM) had advanced to the central Tibetan Plateau at least 27.3 million years ago, and intensified around 25.8 million years ago. These findings suggest that the monsoon changes were driven by the uplift of the plateau and astronomical factors.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Clinical Neurology
J. P. Dyke, D. Sondhi, H. U. Voss, D. C. Shungu, X. Mao, K. Yohay, S. Worgall, N. R. Hackett, C. Hollmann, M. E. Yeotsas, A. L. Jeong, B. Van de Graaf, I. Cao, S. M. Kaminsky, L. A. Heier, K. D. Rudser, M. M. Souweidane, M. G. Kaplitt, B. Kosofsky, R. G. Crystal, D. Ballon
AMERICAN JOURNAL OF NEURORADIOLOGY
(2013)