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Geochemistry & Geophysics
Zhenkai Zhang, Tengfei Zhou, Dongtao Li, Hua Wang, Biao Du, Duanchang Zhao, Yafeng Zhang, Chen Zhang, Zuochen Li, Ning Chen, Xinlei Zhang, Yuehan Shang
Summary: Geochemical and detrital zircon U-Pb-Hf isotopic studies of the Late Devonian metasedimentary rocks from the Xinghongpu Formation provide insights into its depositional age, provenance, and tectonic setting. The research shows that the Xinghongpu Formation was deposited in the Late Devonian with a depositional age no earlier than 363.2 Ma. The metasedimentary rocks mainly originated from mature continental sources, with contributions from mafic and intermediate igneous sources, and were deposited in an active continental margin to continental arc setting.
Article
Geochemistry & Geophysics
Zeng Lu, Jun Yan, Jiabin Li
Summary: Kyanite, a common aluminous mineral in high-to medium-pressure metapelitic rocks, has been discovered in the well-established low-temperature - ultrahigh-pressure (LT-UHP) metamorphic belt of Chinese southwestern Tian-shan through detailed petrographic investigations. It occurs as minute inclusions or porphyroblasts in two different types of metasedimentary rocks. The presence and characteristics of kyanite provide important information about the tectonometamorphic history of orogenic belts and contribute to the understanding of the fate of subducted sediments.
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
Geosciences, Multidisciplinary
Zhang Chenglong, Qin Ya, Yang Yicheng, Feng Zuohai, Liu Xijun, Li Saisai, Wan Lei, Wang Chunzeng
Summary: The study analyzed detrital zircons from a sandstone in northern Guangxi, China, revealing the existence of a Pan-African thermal event. It was found that the study area experienced three stages of crustal growth and the sediments of the Chang'an Formation may have been sourced from the southeastern margin of the Yangtze block. Comparison with zircon age spectra from the Cathaysian block suggests a close connection between the Cathaysian block and Gondwana.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Geosciences, Multidisciplinary
Colin L. Jones, Evan A. Orovan, Sebastien Meffre, Jay Thompson, Elena A. Belousova, Matthew J. Cracknell, John Everard, Ralph Bottrill, Simon Bodorkos, David R. Cooke
Summary: The Tasmanian Devonian granites were emplaced during the Tabberabberan Orogeny and have different zircon isotope compositions and melt evolution paths. The high epsilon Hf group of granites is strongly associated with granite-related Au, Sn, and Sn-W ore deposits.
Article
Geochemistry & Geophysics
Li-Ran Chen, Wang-Chun Xu, Hong-Fei Zhang, Jing-Liang Guo, Bi-Ji Luo
Summary: In this study, new U-Pb isotopic analyses on detrital zircons from Late Paleozoic metasedimentary rocks in the eastern end of the Lhasa terrane were conducted to investigate the origin and characteristics of the terrane. The results suggest a strong affinity between the Lhasa terrane and Indian Gondwana during the Paleozoic, with tectonic activity and climatic variation playing important roles in the detrital zircon record.
Article
Geosciences, Multidisciplinary
Bowen Si, Chunrong Diwu, Rongjun Si
Summary: This study reports the existence of a ca. 3.8 Ga detrital zircon from the quartzite of the Paleoproterozoic Songshan Group in the southern North China Craton. In situ zircon hafnium isotopic characteristics indicate the presence of source rocks as old as ca. 4.5 Ga in the southern North China Craton. Combined with global zircon U-Pb-Hf isotope data and available μ^142Nd values, the study suggests that the silicate Earth differentiated at 4.4-4.5 Ga, developing continental crust and a complementary depleted mantle reservoir.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
A. S. Tabaud, P. Stipska, S. Mazur, K. Schulmann, J. Mikova, J. Wong, M. Sun
Summary: The study of rocks samples from GSM in Poland, using geochemistry and isotopic data, revealed the origin and geological evolution of sedimentary rocks in the area, suggesting that it may have been located along the northern periphery of the Gondwana margin, forming in the middle to late Cambrian period.
Article
Geosciences, Multidisciplinary
Ajay K. Singh, Dewashish Upadhyay, Kamal Lochan Pruseth, Klaus Mezger, Jayanta K. Nanda
Summary: The Simlipal Complex in eastern India is a circular/elliptical structure at the eastern margin of the Singhbhum Craton, possibly representing the remnant of an Archean impact structure. The metasedimentary rocks in the complex, including sandstones/quartzites and shales/slates/phyllites, show a moderate to extensive weathering trend, with the shales/slates/phyllites likely sourced from a granodioritic source. Additionally, the sediments have detrital zircon ages suggesting deposition between approximately 2.8 Ga and 2.5 Ga.
PRECAMBRIAN RESEARCH
(2021)
Article
Geology
Bo Hui, Yunpeng Dong, Franz Neubauer, Shuai He, Jan Varga
Summary: The Neoproterozoic Zhoutan Group in South China provides an important record of sedimentary system, with new detrital zircon U-Pb dating revealing its depositional age, provenance mainly from the Jiangnan Orogen, and metamorphic history during the Silurian period. These findings suggest its tectonic affinity between the Yangtze and Cathaysia Blocks with a potential boundary north of its current location.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geology
Li YuTing, Lu JunSheng, Kong Xu, Liu Gang, Feng Qiang, Zhang YiYi
Summary: The Longshan Complex in the Qinling-Qilian connection area was studied using whole-rock geochemistry, U-Pb dating, and Lu-Hf isotope analysis of detrital zircons. The results provide information about the deposition age, provenance, and tectonic attribution of the complex. The metasedimentary rocks in the complex have a depositional age of 491-463 Ma and the detrital zircons show two main age groups of 593-486 Ma and 1294-634 Ma. The provenance of these rocks is mainly from the Qilian and Qinling orogenic belts. The Longshan Complex is considered as the western extension of the North Qinling orogenic belt, formed in a continental marginal arc environment.
ACTA PETROLOGICA SINICA
(2023)
Article
Geosciences, Multidisciplinary
Ruihong Chang, Franz Neubauer, Yongjiang Liu, Sihua Yuan, Johann Genser, Qianwen Huang, Qingbin Guan, Shengyao Yu
Summary: The pre-Alpine basement of the Austroalpine mega-unit in the Alps is composed of a heterogeneous series of continental units, island arcs, ophiolites, subduction meacute accent langes, accretionary wedges, and seamounts affected by different metamorphic grades. The complex tectonic evolutionary histories and remolten sources of different ages in the pre-Alpine complexes likely assembled not earlier than the Late Permian or Early Triassic, representing multiple locations before final accretion.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Ziyi Zhu, Ian H. Campbell, Charlotte M. Allen, Zefeng Li
Summary: Integrated U-Pb, O and Lu-Hf isotopic analyses of detrital zircons were conducted to study the evolution of the preserved European continental crust. The ages of detrital zircons generally match the major magmatic events in eastern and western Europe. The isotopic data indicate extensive reworking of pre-existing crustal rocks during the late Paleoproterozoic and Paleozoic.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Victor Ikechukwu Vincent, Huan Li, Musa Bala Girei, Hafizullah Abba Ahmed, Eyo Eyo Ntekim
Summary: This study investigates the genesis of Pb-Zn mineralization in the Ningi-Burra region in Nigeria, combining geochemical and geochronological data of magmatic and hydrothermal processes. The findings suggest that the mineralization mainly occurs in highly evolved granites, accompanied by silicification, chloritization, and limited metasomatism. Isotopic analysis of zircon indicates a magmatic source for the hydrothermal fluids involved in the formation of mineralization, highlighting the importance of U-Th-Hf isotopes as robust tools for constraining magmatic and mineralization processes in differentiated granites.
Article
Geochemistry & Geophysics
V. A. Zaika, A. A. Sorokin
Summary: The study reveals that the metasedimentary rocks of the Galam Terrane contain a significant amount of Archean and Paleoproterozoic zircons, sourced mainly from igneous and metamorphic complexes of the southeastern margin of the Siberian Craton. Additionally, some Devonian and Carboniferous zircons were found to be derived from eroded island arcs in the Mongol-Okhotsk Paleocean.