Article
Geosciences, Multidisciplinary
Paul A. Bedrosian, Carol A. Finn
Summary: Researchers developed a new 3D resistivity model of the southern Trans-Hudson orogen and interpreted it alongside other data, revealing a synoptic crustal view of the region and proposing a new tectonic model. The model shows high-conductivity belts marking paleo-subduction zones, providing insight into the tectonic processes that formed the orogen.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geology
Dao-Ming Yang, Tong Hou, Wenlei Song, Jingyi Qin, Diao Luo, Meng Wang, Ilya V. Veksler
Summary: The Miaoya carbonatite-syenite complex in central China hosts both Nb and REE mineralization. Our study of zircon grains within the complex revealed that the zircons experienced different formation processes during early and late stages of magma differentiation. Secondary zircons underwent solid-state recrystallization and dissolution-reprecipitation, likely caused by infiltration of late-stage residual carbonatitic melts.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Ke Su, Shao-Bing Zhang, Zhen-Xin Li, Liang Zhang, Ting Liang, Yifan Du, Long Li
Summary: A set of carbonatite dykes intruded into Paleoproterozoic granites in Fengzhen area, and some pyroxenites and syenites were also developed close to the carbonatite dykes. However, the genetic relationship between these rocks and carbonatite dykes has not been solved.
Article
Geosciences, Multidisciplinary
T. Martins, N. Rayner, D. Corrigan, P. Kremer
Summary: The collaborative federal-provincial Southern Indian Lake project in north-central Manitoba conducted detailed geological studies, including mapping, sampling, and geochemical analysis. The results revealed distinct lithologies and multiple episodes of plutonism in the region.
CANADIAN JOURNAL OF EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Christopher J. M. Lawley, David A. Schneider, Alfredo Camacho, Christopher R. M. McFarlane, William J. Davis, Xue-Ming Yang
Summary: Metamorphic devolatilization is thought to be the critical process for the formation of orogenic gold deposits, but recent studies show that multiple hydrothermal stages are responsible for the formation of these deposits. New geochronology results from the Lynn Lake greenstone belt in Canada provide evidence for the timing of gold deposition and suggest that burial and exhumation of reactive trap rocks, rather than regional metamorphism, drove the post-orogenic auriferous fluids. This revised mineral systems model has implications for mineral exploration and highlights the importance of studying the earliest ore-forming structures reactivated during multiple stages of orogenesis.
PRECAMBRIAN RESEARCH
(2023)
Article
Geochemistry & Geophysics
Roger H. Mitchell, John Gittins
Summary: This article proposes a taxonomy and naming method for carbonatites and carbothermalites based on mineralogy and origin. It suggests classifying them solely based on their modal mineralogy and abandoning redundant names. The currently used compositional classifications do not reflect the mineralogy of these rocks. Alternative methods are provided for those who still prefer using bulk rock compositions.
Article
Mineralogy
Chris g. Coueslan
Summary: The Huzyk Creek area contains graphite deposits that are enriched in V, U, Zn, Mo, and Cu, which were leached from rocks of the nearby Flin Flon arc-collage. The proposed model suggests that the metal-enriched water drained into the Kisseynew Basin and interacted with organic matter, resulting in the formation of insoluble organometallic complexes. This model may be applicable to similar basins worldwide.
CANADIAN MINERALOGIST
(2022)
Article
Geosciences, Multidisciplinary
A. Djeddi, F. Parat, J-L Bodinier, K. Ouzegane, J-M Dautria
Summary: The study on the Ihouhaouene alkaline complex revealed significant compositional differences among different rock types, as well as disequilibrium between apatite and clinopyroxene. The results suggest that the formation process of these rocks may have been influenced by the differentiation of parental magmas and mixing between different types of melts.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Mbili Tshiningayamwe, Robert Bolhar, Paul A. M. Nex
Summary: The Epembe Alkaline Carbonatite Complex is an intrusion in the Paleoproterozoic basement, composed of alkaline rocks and calcite-carbonatite dykes. The age and geochemical characteristics of the rocks suggest that they were formed from mantle-derived magmas and were not affected by interaction with the crust.
JOURNAL OF AFRICAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Ron M. Clowes, Baishali Roy
Summary: This study reprocessed geological data of the Kisseynew domain and its boundaries, revealing the complex structures within the crust and characteristics of the boundary region through gravity analysis and seismic reflection profiles.
CANADIAN JOURNAL OF EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Caitlin M. J. Beland, Anthony E. Williams-Jones
Summary: Due to technological advances in aerospace and automotive industries and concerns about supply, scandium has become a critical metal and a target of exploration activity. The Crater Lake deposit is the only known deposit with scandium production potential, where hedenbergite and hastingsite are the main scandium minerals concentrated in a cumulate facies of ferrosyenite. A fractional crystallization model based on mineral paragenesis and compositional data suggests that the ferrosyenite formed as a result of fractionation of various minerals, leading to the formation of a potentially large scandium resource.
Article
Geology
Zhe Li, Yan Liu
Summary: This study presents zircon U-Pb dating, whole-rock geochemical, Sr-Nd-Pb isotope, and zircon Hf-O isotope data for the Dunkeldik carbonatite-syenite complex on the Pamir Plateau. The results indicate that the complex was formed by partial melting of enriched lithospheric mantle during the Miocene India-Asia collision and was assimilated by upper crustal material during magma ascent. The limited REE mineralization potential of the complex is attributed to the involvement of crustal material in the magma and less fenitization.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Jian Li, Chenyang Ye, Jifeng Ying
Summary: Through the study of apatite, we investigate the magma evolution and mantle sources of the Shaxiongdong complex. Apatites record the distinct evolution of their parental magmas and show compositional variations among different lithologies. The Sr-Nd isotope data of apatite suggest a mixed mantle source for the carbonatite in the complex.
Article
Geochemistry & Geophysics
Michael Mints, Ksenia A. Dokukina, Tamara B. Afonina
Summary: The study suggests that during the Palaeoproterozoic era, the formation and evolution of the Lauroscandia supercontinent were closely linked to the activity of the Hudson Bay superplume, which initiated a series of significant tectonic events.
Article
Geochemistry & Geophysics
Vratislav Hurai, Monika Huraiova, Patrik Konecny
Summary: The accessory mineral assemblage of igneous cumulate xenoliths in volcanoclastic deposits in the Carpathian back-arc basin provides insights into the intrusive complexes beneath Upper Miocene-Pliocene basalt volcanoes, consisting of gabbro, alkalic to alkali-calcic syenite, and calcic orthopyroxene granite. The magmatic reservoir beneath Pincina maar includes mafic cumulates, carbonatite, and calc-alkalic granite, while the wider area around Fiakovo and Hajnacka maars contains alkalic syenite and calc-alkalic granite. These reservoirs are believed to have formed through underplating, differentiation, and interaction of basaltic magma with the mantle and crust, with specific accessory minerals characterizing each rock type.
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.