Article
Geochemistry & Geophysics
Benjamin E. Cohen, Darren F. Mark, William S. Cassata, Lara M. Kalnins, Martin R. Lee, Caroline L. Smith, David L. Shuster
Summary: Research found that the shergottites have a wide range of ages, with statistically robust Ar-40/Ar-39 isochron ages ranging from 161+/-9 Ma to 540+/-63 Ma, consistent with other dating methods. These data indicate that, despite experiencing shock metamorphism, the shergottites were sourced from the youngest volcanoes on Mars.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Allan Silva Gomes, Paulo Marcos Vasconcelos, Isabela de Oliveira Carmo
Summary: The presence of secondary phases in volcanic rocks and intrusive units may pose challenges for high resolution 40Ar/39Ar geochronology. Acid treatment is used to remove alteration products, but it has minimal impact on the accuracy of age determinations. Effective separation of atmospheric and radiogenic gases can successfully mitigate deleterious effects associated with alteration phases.
Article
Geochemistry & Geophysics
C. Antoine, R. A. Spikings, D. Miletic, J. S. Marsh, S. P. Gaynor, U. Schaltegger
Summary: The extrusive component of the Karoo Large Igneous Province, the Drakensberg Continental Flood basalts of South Africa and Lesotho, is mainly composed of altered tholeiitic basalts without suitable uraniferous mineral phases for high-precision dating. Multiple techniques were used to study the plagioclase in the lavas, revealing two distinct generations of plagioclase and different alteration phases. The study explains the inaccuracies in previous dating results and provides the most accurate age for the entire lava stack.
Article
Geochemistry & Geophysics
Edgar A. Cortes-Calderon, Ben S. Ellis, Chris Harris, Darren F. Mark, Julia Neukampf, John A. Wolff, Peter Ulmer, Olivier Bachmann
Summary: Through the study of the Fataga Group on Gran Canaria, it is found that it is a new location of low-delta O-18 felsic rocks, and the main magmatic process is fractional crystallization at shallow depths. The volcanic caldera and fault system also play a role in the assimilation of hydrothermally altered rocks.
JOURNAL OF PETROLOGY
(2022)
Article
Geology
Timothy Paulsen, John Encarnacion, Anne M. Grunow, Victor A. Valencia, Mark E. Pecha, Jeffrey Benowitz, Paul Layer
Summary: New age data from the Queen Maud Mountains in the Ross orogenic belt of Antarctica reveal that plutonism primarily occurred during the Cambrian to Ordovician periods, with polymodal age distributions consistent with regional magmatic flare-ups along the Pacific-Gondwana margin. Deformed plutons indicate deformation during the Cambrian to Ordovician periods, transitioning to post-tectonic magmatism and cooling at around 509-470 Ma. This suggests that the Queen Maud-Horlick Mountains share a similar petrotectonic history with other regions along the Pacific-Gondwana margin, providing new evidence for their tectonic evolution.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geosciences, Multidisciplinary
F. Marra, G. L. Cardello, M. Gaeta, B. R. Jicha, P. Montone, E. M. Niespolo, S. Nomade, D. M. Palladino, A. Pereira, G. De Luca, F. Florindo, A. Frepoli, P. R. Renne, G. Sottili
Summary: In this study, the Quaternary Volsci Volcanic Field in central Italy was investigated with new geochronological data and compositional analysis of eruptive products. The research revealed a history of volcanic activity and its implications on magma systems and subduction processes. The fast ascent of primitive magma batches is suggested to be controlled by tectonic forces in a compressive stress field.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Herve Wabo, Nicolas J. Beukes, Sarbani Patranabis-Deb, Dilip Saha, Georgy Belyanin, Jan Kramers
Summary: The Southern Purana basins in the Bastar and Dharwar cratons contain well-preserved carbonate layers dating back to the Mesoproterozoic era, including the unique Narji Limestone in the Cuddapah basin. These carbonates share a similar primary paleomagnetic signature, suggesting interconnected successions deposited during a marine flooding event on the Southern India craton in the middle to late Mesoproterozoic periods. This contradicts previous interpretations based on geochronological data and supports the idea that the Neoproterozoic ages for Sequence III may reflect post-depositional events.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geology
Igor M. Villa, Giulia Bosio
Summary: The substoichiometric potassium concentrations and low alkali occupation observed in biotite phenocrysts from marine tephra layers are likely the result of diagenetic alteration caused by exposure to interstitial water and brine intrusions. This alteration has been shown to affect potassium-argon ages, leading to discordance, high step ages, and anomalies in elemental ratios. The preferential leaching of potassium from the phyllosilicate interlayers and the shielding of radiogenic Ar* in the tetrahedral-octahedral-tetrahedral (T-O-T) phyllosilicate layer are proposed as mechanisms for the observed discrepancies.
Article
Geochemistry & Geophysics
Leah E. E. Morgan, Brett Davidheiser-Kroll, Klaudia F. F. Kuiper, Darren F. F. Mark, Noah M. M. McLean, Jan R. R. Wijbrans
Summary: The accuracy and traceability of geochronometers are crucial to questions asked by Earth scientists. This study focuses on the 40Ar/39Ar geochronometer and its co-irradiation with reference materials. The authors used various calibration methods to determine the ages of monitor minerals and found that the current results do not meet the desired accuracy, but the extensive methodology development presented in this study can help improve future measurements.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2023)
Article
Geochemistry & Geophysics
V Brombin, E. A. Pettitt, M. F. Fahnestock, M. Casalini, L. E. Webb, J. G. Bryce, G. Bianchini
Summary: The Veneto Volcanic Province (VVP) is an intraplate magmatic area with relationships to coexisting subduction processes. Research findings show that VVP melts were affected by metasomatic enrichments, and their isotope ratios conform to mantle component features. Geochronological data indicate the oldest magmatic episodes occurred around 45-42 million years ago, with subsequent eastward migration of VVP activity.
Article
Geography, Physical
H. S. Monteiro, P. M. Vasconcelos, K. A. Farley, C. L. Mello, F. T. Conceicao
Summary: Distinctive sediments containing quartz, kaolinite, detrital and authigenic hematite and goethite are present along the Atlantic coast of Brazil. These sediments represent a significant period of erosion and weathering, with strong influence from biologically driven weathering reactions. The ages of detrital and authigenic goethites and hematites suggest that sedimentation occurred between 26-20 million years ago. Furthermore, (U-Th)/He geochronology indicates a period of tropical climate and abundant vegetation dominating the coast of Espirito Santo since the Pliocene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geography, Physical
A. Cisneros de Leon, M. Danisik, J. C. Schindlbeck-Belo, S. Kutterolf, A. K. Schmitt, A. Freundt, J. Kling, K. -L. Wang, H. -Y. Lee
Summary: Defining precise eruption timelines for explosive volcanoes in continental arcs is essential for forecasting future hazards and mitigating volcanic disasters. However, establishing reliable ages for past eruptions in the Central American Volcanic Arc has been challenging due to the lack of suitable materials for dating. In this study, zircon was used to determine the eruption ages of the Amatitlan caldera in Guatemala, revealing a more frequent eruptive activity than previously thought.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geochemistry & Geophysics
E. Scibiorski, F. Jourdan, K. Mezger, E. Tohver, H. Vollstaedt
Summary: In 40Ar/39Ar geochronology, cryptic excess 40Ar phenomenon was identified with anomalously old apparent dates that are difficult to determine by traditional methods. Rb/Sr geochronology proved to be an effective method for testing the geological significance of 40Ar/39Ar plateau dates.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Bryant Ware, Fred Jourdan, Nicholas E. Timms
Summary: This study investigates the duration of magmatic activity in the Tasmanian dolerites (Ferrar) using high-precision geochronology. The results show that the magmatic activity lasted for about 1.6 million years, longer than previously thought. The study also reveals the inheritance of plagioclase crystals and the evolution of magma chemistry.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Qiang Jiang, Fred Jourdan, Hugo K. H. Olierook, Renaud E. Merle, Chrystele Verati, Celia Mayers
Summary: 40Ar/39Ar geochronology is crucial for determining the timing of basaltic events due to the lack of suitable minerals for other dating techniques. Plagioclase, a common mineral in basalts, is often altered, affecting the accuracy of dating results. Even a small amount of alteration can lead to younger ages, and the Ca/K ratios of plagioclase play a role in the sensitivity of age determination to alteration. Inspecting age spectra, Ca/K ratios, and degassing curves can help identify alteration signatures in plagioclase samples.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geosciences, Multidisciplinary
Ciro Cucciniello, Ashwini Kumar Choudhary, Kanchan Pande, Hetu Sheth
GEOLOGICAL MAGAZINE
(2019)
Article
Geosciences, Multidisciplinary
L. Franciosi, M. D'Antonio, L. Fedele, V. Guarino, C. C. G. Tassinari, R. de Gennaro, C. Cucciniello
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2019)
Article
Geosciences, Multidisciplinary
Noel-Aimee Keutchafo Kouamo, Depesquidoux Tchato Tchatptchet, Anne Laure Tezanou Ngueguim, Nicole Armelle Simeni Wambo, Jean Pierre Tchouankoue, Ciro Cucciniello
ARABIAN JOURNAL OF GEOSCIENCES
(2019)
Correction
Geosciences, Multidisciplinary
Noel-Aimee Keutchafo Kouamo, Depesquidoux Tchato Tchaptchet, Anne Laure Tezanou Ngueguim, Nicole Armelle Simeni Wambo, Jean Pierre Tchouankoue, Ciro Cucciniello
ARABIAN JOURNAL OF GEOSCIENCES
(2019)
Article
Environmental Sciences
Ilenia Arienzo, Marcello Liotta, Lorenzo Brusca, Massimo D'Antonio, Federica Lupone, Ciro Cucciniello
Article
Geochemistry & Geophysics
Ciro Cucciniello, Hetu Sheth, Raymond A. Duraiswami, Wencke Wegner, Christian Koeberl, Tarulata Das, Vivek Ghule
Article
Construction & Building Technology
Celestino Grifa, Chiara Germinario, Mariano Mercurio, Francesco Izzo, Francesco Pepe, Piero Bareschino, Ciro Cucciniello, Vincenzo Morra, Giuseppe Cultrone, Antonio Carafa, Alessio Langella
Summary: The history of brick manufacturing in Madagascar can be traced back to the early 19th century, with the country using lateritic soils and carbonate-bearing clays as raw materials for brick making. Bricks are prepared on site with no additional manipulation of the base clay, and fired using rice husk, peat, and wood as fuel sources. However, the poor quality of furnaces leads to significant heat loss and lower firing temperatures, impacting the quality of the bricks.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Geochemistry & Geophysics
Ciro Cucciniello, Riccardo Avanzinelli, Hetu Sheth, Martina Casalini
Summary: Continental flood basalt (CFB) provinces often contain both tholeiitic basalts and alkaline magmas, which may come from different degrees of partial melting of the same mantle source or metasomatised, incompatible element-enriched mantle sources. This study focuses on the Saurashtra region in India, where tholeiitic lavas have been intruded by the Mount Girnar plutonic complex. The study found that the alkaline magmas of the Girnar plutonic suite were derived from enriched mantle, while the tholeiitic intrusions were derived from depleted mantle and experienced significant contamination by ancient granitic basement crust. The tholeiitic and alkaline magmas are petrogenetically and structurally unrelated in this region.
JOURNAL OF PETROLOGY
(2022)
Article
Geochemistry & Geophysics
S. Minissale, M. Casalini, C. Cucciniello, C. Balagizi, D. Tedesco, G. Boudoire, V Morra, L. Melluso
Summary: In this study, the geochemical and isotopic variability of primitive and evolved magmas from the Nyamulagira and Nyiragongo volcanic complexes were investigated. The differences in silica undersaturation and incompatible element enrichment between the two volcanoes were remarkable. The concentration of volatile elements increased with magmatic evolution and showed distinct differences between the two volcanic complexes. The isotopic range of Sr-Nd-Pb overlapped with previous analyses in the Virunga Volcanic Province and suggested a negligible role for subducted sediments as a mantle-added geochemical component.
Article
Geosciences, Multidisciplinary
Ciro Cucciniello, Celestino Grifa, Roberto de'Gennaro, Luigi Franciosi, Ivana Rocco, Vincenzo Morra, Leone Melluso
Summary: The Bobaomby volcanic field in Madagascar is a diverse volcanic area with varying rock compositions, suggesting a complex magma source and crystallization processes.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Helga de Wall, Anette Regelous, Frank Tomaschek, Michel Bestmann, Gregor Hahn, Kamal Kant Sharma
Summary: A new model for a Tonian active continental margin in the Neoproterozoic western foreland of the Delhi Fold Belt of NW India is introduced in this study, indicating a transition from continental crust into an active arc setting before the emplacement of the volcano-plutonic Malani Igneous Suite. The Erinpura Granites in a large area west of the Delhi Fold Belt are S-type, whereas the granites, granodiorites, and gabbros in the westernmost basement outcrops are I-type and show positive Nd ratios. The integration of data from East Pakistan and East Oman establishes an evolutionary model for a Tonian active continent margin, suggesting 130 Myr of ongoing subduction along the continental margin from 900 to 770 Ma.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Kamal Kant Sharma, C. V. Dharma Rao, Sung Won Kim, Ritesh Purohit, Riya Dutta
Summary: This study focuses on the geochemistry and geochronology of a gabbro in the northwestern Indian Shield, showing an Oceanic Floor Basalt (OFB) affinity and limited degrees of crustal contamination.
JOURNAL OF EARTH SYSTEM SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Noel-Aimee Kouamo Keutchafo, Nicole Armelle Wambo Simeni, Brillant Kandzi Nforba, Agathe Arrissa Noucoucouk, Josiane Demlabin Sonmo, Depesquidoux Tchato Tchaptchet, Jean Pierre Tchouankoue, Ciro Cucciniello
Summary: Several dyke swarms of Paleozoic-Mesozoic age have been discovered in western Cameroon, intruding the Precambrian basement in the southern continental part of the Cretaceous Cameroon Volcanic Line. In the Njimom area, two groups of mafic dykes have been observed, crossing the Neoproterozoic basement rocks. The geochemical features of these dykes, particularly those that intrude the granites, are similar to those of Paleozoic and Mesozoic dykes recorded in the southern continental part of the Cameroon Volcanic Line, indicating multiple reactivations of pre-existing fractures.
Article
Geosciences, Multidisciplinary
Riya Dutta, Harsh Bhu, Ritesh Purohit, Kamal Kant Sharma
Summary: The study focuses on the granitoids from the PARB, revealing their relatively young age and complex relationship with associated metasediments. Quartzite outcrops and "Remnant" outcrops play a crucial role in the research.
JOURNAL OF EARTH SYSTEM SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Vanit Patel, Hetu Sheth, Ciro Cucciniello, Gopal W. Joshi, Wencke Wegner, Hrishikesh Samant, Bibhas Sen, Christian Koeberl
Article
Geochemistry & Geophysics
Huichuan Liu, Alan R. Hastie, Chiara Maria Petrone
Summary: This study conducted isotope analyses on two ocean island basalt (OIB)-associated enriched mafic intrusions in the Yunnan-Burma region, and found that these rocks may have originated from the subduction recycling of marine sediments and altered oceanic crust.
Article
Geochemistry & Geophysics
L. Notini, M. Scambelluri, A. Tommasi, A. Zanetti, F. Ferri, A. Rodriguez-Vargas, E. Rampone
Summary: This study provides important petrologic information on the mantle wedge above an active subduction zone in Southern Colombia. The researchers analyzed a unique suite of rock samples and found evidence of hydration, metasomatism, and partial melting in the mantle wedge. They also observed variations in lithotypes, textures, and mineral abundance, indicating different interactions with melts and fluids. This study sheds light on the complex petrological processes occurring in the mantle wedge and contributes to our understanding of subduction zone dynamics.
Article
Geochemistry & Geophysics
Sourav Bhattacharjee, Aniket Chakrabarty, Roger H. Mitchell, Suresh Chandra Patel, Evgeniy N. Kozlov, Ekaterina N. Fomina, Monojit Dey, Supratim Pal
Summary: The Hogenakkal complex in India consists of silicate-rich and silicate-poor carbonatites and clinopyroxenites. The formation of carbonatite is influenced by silicate minerals. The carbohydrothermal mineralization in the carbonatites is induced by magma-derived fluids and interactions with the surrounding rocks.
Article
Geochemistry & Geophysics
Jia-Min Wang, Kyle Patrick Larson, Jin-Jiang Zhang, Liang Zhao, Fu-Yuan Wu
Summary: The role of collisional belts in the global carbon budget is controversial. This study reveals a previously unrecognized carbon source in the collisional orogen of the Himalayas, where metamorphism of carbonate-bearing rocks in the hanging wall resulted in significant CO2 degassing.
Article
Geochemistry & Geophysics
Joseph Martial Akame, Elson Paiva Oliveira, Vinciane Debaille, Marc Poujol, Bernhard Schulz, Dieudonnee Bisso, Fabien Humbert, Serge Parfait Koah Na Lebogo, Philmont Zo'o Zame
Summary: Archean granitoids play key roles in the crustal evolution and can provide important insights into early geologic processes.
Article
Geochemistry & Geophysics
Xiguang Huang, Jun He, Jingxin Zhao, Jingzhao Dou, Weiyong Li, Aimin Hu, Ge Liu, Yiru Ji, Fukun Chen, Shuangqing Li
Summary: This study investigates the zircon ages and whole-rock geochemical data of Late Paleozoic magmatic rocks in the Western Yunnan Tethyan belt to identify the origin and mechanism of mantle melting. The results suggest that these magmatic rocks may originate from different mantle domains that were metasomatized by slab-derived fluids and sediment-derived melts.
