Article
Geosciences, Multidisciplinary
Yousef Zoleikhaei, Rajat Mazumder, Peter A. Cawood, Shuvabrata De
Summary: Archean cratons provide valuable information about Earth's early history. This study focuses on the Singhbhum Craton in India and examines the magmatism and basin formation events in its northern margin. By analyzing the ages and geochemical characteristics of granite and sedimentary rocks, the study reveals the role of crustal melting in magma genesis and the sources of terrigenous sediments. The findings contribute to our understanding of the early geological evolution of the Earth.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Stephen J. Puetz, Christopher J. Spencer, Carlos E. Ganade
Summary: This study compares the accuracy of four different best age models using a new global detrital zircon database, finding that the age distributions based on the five non-iterative class-based models are better correlated.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Anirban Mitra, Sukanta Dey, Pranab Das, Keqing Zong, Yongsheng Liu
Summary: Through the study of whole-rock geochemistry, detrital zircon U-Pb-Hf isotopes, and trace element data from Mesoarchean clastic rocks in two greenstone belts of the western Dharwar Craton, it is found that these rocks were derived from a strongly weathered stable continental provenance dominated by low-HREE TTGs and K-rich granites of shallow crustal origin. The detrital zircon U-Pb and Lu-Hf data indicate two major crust formation events, with the antiquity of the western Dharwar Craton traced back to at least 3.8 Ga. The detrital record suggests episodic crustal growth and reworking in the western Dharwar Craton during the Paleoarchean to early Mesoarchean period, possibly related to intraplate processes.
Article
Geochemistry & Geophysics
Luciano Ribeiro da Silva, Davis Carvalho de Oliveira, Aline Costa do Nascimento, Claudio Nery Lamara, Jose de Arimateia Costa de Almeida
Summary: The study reveals that the different rock types in the Ourilandia plutonic complex were formed at different depths and under different conditions, representing a period of crustal growth in the region around approximately 2.88 billion years ago.
Article
Geosciences, Multidisciplinary
Hugo K. H. Olierook, Christopher L. Kirkland, Milo Barham, Matthew L. Daggitt, Julie Hollis, Michael Hartnady
Summary: The study presents a technique to rapidly extract meaningful core model ages from core-rim mixtures, along with a Python-based program for easy application of this approach. The efficacy of the technique is demonstrated on a detrital sample from East Greenland, recovering dates of detrital cores from core-rim mixtures. Caution is advised against using this technique without checking the appropriateness of the underlying assumptions, and chemical means are provided for evaluating the assumptions.
Article
Geosciences, Multidisciplinary
Benjamin Wasilewski, Jonathan O'Neil, Hanika Rizo, Jean-Louis Paquette, Abdel-Mouhcine Gannoun
Summary: The Saglek-Hebron Complex in Northern Labrador, Canada, contains some of the oldest crustal rocks on Earth, with over one billion years of early magmatic history recorded. New analyses on zircons suggest six distinct magmatic events formed the felsic crust, with ages ranging from approximately 3857 Ma to 2750 Ma. The complex and protracted crustal history of the SHC is marked by the reworking of mafic and felsic crust over one billion years.
PRECAMBRIAN RESEARCH
(2021)
Article
Geology
Tao Wu, Yaqin Luo, Kongyang Zhu, Qinglong Lin, Yan Zhang, Zilong Li
Summary: This study presents new zircon ages and Lu-Hf isotopes of felsic volcanic rocks in southeastern Zhejiang Province, revealing their petrogenesis and tectonic background. The distribution of volcanic rocks in the province is found to be correlated with time and juvenile components in the source region. The results support the episodic roll-back of the Palaeo-Pacific plate model and refute the hypothesis of a large volume eruption over a short interval of time.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Arathy Ravindran, Klaus Mezger, S. Balakrishnan, Jasper Berndt, Sameer Ranjan, Dewashish Upadhyay
Summary: Combining U-Pb zircon ages with Hf-Sr-Pb isotopes, this study provides insights into the petrogenetic evolution of the continental crust in the western Dharwar Craton, India. The research reveals the presence of the oldest felsic crustal material in the region, and the formation of major felsic continental crust during a specific time interval. The study also suggests that the Mesoarchean felsic crust in the Dharwar Craton was formed through differentiation of melts from different source rocks and incorporated reprocessed crustal material over time.
Article
Geosciences, Multidisciplinary
Sameer Ranjan, Dewashish Upadhyay, C. Srikantappa
Summary: This study utilized the U-Pb-Hf isotope composition of detrital zircon to investigate the geological history and rock formation in the Western Dharwar Craton. The analysis revealed different periods of crust formation and extraction, as well as detrital zircon with both radiogenic and crust-like Hf isotopic compositions.
PRECAMBRIAN RESEARCH
(2022)
Article
Geochemistry & Geophysics
Sean P. Gaynor, Melissa Ruiz, Urs Schaltegger
Summary: This study presents high-precision isotope dilution-thermal ionization mass spectrometry (ID-TIMS) U-Pb zircon data from the Carboniferous Punteglias granodiorite in Switzerland. The results show that the zircon crystals have a mixture of two different age components, and the crystallization age of the zircon is determined to be 335.479 +/- 0.041 Ma. Additionally, pretreating the zircon samples with physical and chemical abrasion reduces age dispersion and allows for a more accurate determination of the initial magmatic domains. The high analytical precision of this study is crucial for correctly interpreting complex age spectra.
Article
Chemistry, Analytical
Jia-Long Hao, Wei Yang, Sen Hu, Rui-ying Li, Jiang-Long Ji, Hitesh G. Changela, Yang-Ting Lin
Summary: This paper presents a novel Pb-Pb and U-Pb analytical method at a sub-micron scale using a NanoSIMS with a new RF ion source. The technique allows for high spatial resolution but may introduce depth effects, requiring adjustments in the scan area to eliminate mass fractionation. Results from zircon and lunar samples are in good agreement with reference ages within analytical uncertainties.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Geochemistry & Geophysics
Jian-Wei Zi, Birger Rasmussen, Janet R. Muhling, Ian R. Fletcher
Summary: Zircon U-Pb geochronology is crucial for calibrating the geologic timescale. This study found that zircon grains in the Brockman Iron Formation yielded ages younger than the host sedimentary rock. In situ U-Pb dating techniques were used to directly analyze zircon crystals, and the results were consistent with independent age constraints. The study also discovered that young zircon dates could be attributed to hydrothermal alteration.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Clauber R. F. Assis, Candido A. Moura, Joao M. Milhomem Neto, Paulo S. S. Gorayeb, Airton N. C. Dias
Summary: The Araguaia Belt exposes Archean and Paleoproterozoic basement rocks, which have been accurately dated and studied for their evolution. The basement rocks show different components from the Archean and Paleoproterozoic periods, shedding light on their relationship with the southeastern Amazonian Craton.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
J. W. D. Strong, J. A. Mulder, P. A. Cawood, A. R. Cruden, O. Nebel
Summary: This study analyzes zircon U-Pb-Hf isotopic data from the Winnipeg River plutonic-gneiss terrane and reveals its early crustal evolution. The results show similar geological histories between the Winnipeg River terrane and the Hudson Bay and Minnesota River Valley terranes, suggesting that an Eo-Paleoarchean proto-craton disaggregated into three fragments during the formation of intervening granite-greenstone terranes in the Mesoarchean, and then reaggregated in the Neoarchean. This study highlights that Archean cratons are not simple entities that formed in a single event, but may have experienced times of cratonic breakup and reassembly.
PRECAMBRIAN RESEARCH
(2023)
Article
Geology
Bruna Saar Almeida, Carlos Augusto Sommer, Farid Chemale, Antonio Joao Paes de Barros, Mauro Cesar Geraldes
Summary: This paper presents zircon U-Pb, REE and Hf data for Paleoproterozoic felsic volcanic rocks from the Colider Group in the southwestern Amazonian Craton, revealing geographical differences in the origin and age of the rocks.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Sukanta Dey, Sayantan Pal, S. Balakrishnan, Jaana Halla, Matti Kurhila, Esa Heilimo
PRECAMBRIAN RESEARCH
(2018)
Article
Geochemistry & Geophysics
Jaana Halla, Esa Heilimo
Article
Geochemistry & Geophysics
E. Heilimo, J. Halla, P. Holtta
Review
Geochemistry & Geophysics
J. Halla
Article
Geosciences, Multidisciplinary
Jaana Halla, Jeroen van Hunen, Esa Heilimo, Pentti Holtta
PRECAMBRIAN RESEARCH
(2009)
Article
Geosciences, Multidisciplinary
Esa Heilimo, Jaana Halla, Tom Andersen, Hannu Huhma
PRECAMBRIAN RESEARCH
(2013)
Article
Geosciences, Multidisciplinary
Jaana Halla
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geochemistry & Geophysics
Kumar Batuk Joshi, Sunil Kumar Singh, Jaana Halla, Talat Ahmad, Vinai K. Rai
Summary: The Bundelkhand craton in central India is an important region for studying the growth of Archaean crust and the stability of supercontinents. The high-K granitoids in this craton are divided into low silica-high Mg and high silica-low Mg groups based on their geochemical characteristics. The study aims to understand the role of juvenile and crustal sources in the evolution of different types of granitoids by comparing their geochemical signatures and Nd isotope evidence. The results suggest that the crustal contribution and residence times vary for different types of granitoids, reflecting the transition from early mafic sources to strong crust-mantle interactions.
Review
Geosciences, Multidisciplinary
Jaana Halla
Article
Geochemistry & Geophysics
J Halla
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.
