Article
Geosciences, Multidisciplinary
Jun-Jian Li, Zhi-Cai Dang, Chao Fu, Peng-Peng Zhang, Jie-Peng Tian, Jiang-Tao He
Summary: The Yangjiakuang gold deposit, located in the Penglai-Qixia-Fushan Gold Belt, is different from previous gold deposits in terms of host rocks. It is formed in the marble of the Paleoproterozoic Fenzishan Group, unlike the Archean gneiss and Mesozoic granite-hosted deposits. Two orebodies controlled by the Yangjiakuang syncline have been explored, and three ore-forming stages have been identified.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Alf Andre Orvik, Trond Slagstad, Bjorn Eske Sorensen, Ian Millar, Harald Hansen
Summary: This study presents new mineralogical, geochronological, and isotopic data for the Gallojavri ultramafic intrusion in the Karasjok Greenstone Belt. The study suggests that the intrusion was formed around 2.05 billion years ago and experienced incomplete magma mixing and crustal interaction.
PRECAMBRIAN RESEARCH
(2022)
Article
Geochemistry & Geophysics
Zhao-yang Song, Yan-chen Yang, Shi-jiong Han, Bao-yi Li, Zi-jian Zeng, Tian-wen Chen
Summary: The Yawan Sb deposit in Gansu, China is a large deposit hosted in Triassic limestone. It is controlled by NE-trending faults and exhibits different ore-forming stages. Sulfur isotopes suggest a magmatic source, while lead isotopes indicate a mixed source of crust and mantle. Carbon and oxygen isotopes of calcites show a magmatic origin with influences from water-rock interaction and meteoric water. The deposit formed in the Late Triassic to Early Jurassic and belongs to a distal magmatic-hydrothermal deposit. Future exploration should focus on similar deposits controlled by faults around concealed granites and skarn-type deposits in the Yawan-Daqiao district.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2023)
Article
Geosciences, Multidisciplinary
Marie Pierre Dabard, Alfredo Loi, Pamela Pavanetto, Mattia Alessio Meloni, Natalia Hauser, Massimo Matteini, Antonio Funedda
Summary: This study investigates the sedimentary source areas of the Armorican Massif using U-Pb LA-MC-ICP-MS geochronology on detrital zircons, whole-rock Sm-Nd, and zircon Lu-Hf isotope analysis. It reveals changes in sediment flux characteristics post-Cadomian orogenesis and differences in paleogeographic locations during the Lower Ordovician. The results suggest geological continuity between the Armorican Massif and neighboring massifs, and highlight the importance of accurate sediment provenance analysis for reconstructing paleogeographic affinities.
Article
Geochemistry & Geophysics
Yanick Brice Lemdjou, Huan Li, Scott A. Whattam, Kevin Igor Azeuda Ndonfack, De Pesquidoux I. Tchato Tchaptchet, Yanick Blaise Ketchaya, Jonathan Atuquaye Quaye, Franck Wilfried Nguimatsia Dongmo
Summary: The Ouaden, Doumba Bello, and Ngoura granitic plutons in eastern Cameroon are part of the Central African Fold Belt. They formed during a late-subduction early-collision setting by mixing of mantle- and crust-derived melts. The study indicates that these plutons were emplaced at around 640 Ma and were derived from partial melting of Paleoproterozoic crust.
Article
Geology
Xiaolei Chu, Jinggui Sun, Yong Zhang, Yang Liu, Zhikai Xu, Jilong Han, Chuntao Zhao, Yanpeng Liu, Kezhang Qin
Summary: The Ermi porphyry Cu deposit is a medium-sized copper deposit located on the northeastern margin of the North China Craton. The copper mineralization mainly occurs within intrusions of various rock types and is thought to have formed in an active continental margin environment related to plate rollback during the Cretaceous period.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Cheng Wang, Yong-Jun Shao, Peter A. Cawood, Jian-Feng Chen, Yi-Qu Xiong, Yue-Jun Wang
Summary: The Renli-Chuanziyuan pegmatite field in South China shows distinct zonation and variation in mineral composition and geochemical characteristics. The in-depth analysis of minerals and isotopes indicates that the formation of the pegmatite deposits is primarily controlled by Rayleigh-type fractional crystallization, and the source rocks are chemically zoned granites.
JOURNAL OF PETROLOGY
(2023)
Article
Geology
Qin Ye, Hanjie Wen, Chongguang Luo, Yu Chen, Wenxiu Yu, Yi Cui
Summary: A lithium-rich claystone with great potential for lithium exploration has been discovered in Central Yunnan, China. However, the origin of the claystone is still being debated. Through various analyses, it was found that the age distribution and source of the claystone differ. It is suggested that the weathering products from the Weining Formation may have provided the primary material for the Daoshitou Formation claystone.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Qing-fei Sun, Ke-yong Wang, Feng-yue Sun, Chun-kit Lai, Miao Zhang, Chen-guang Zhao, Li-xue Sun
Summary: The southern Great Xing'an Range in NE China is a significant polymetallic mineral province with superimposing mineralization at the Panjiaduan deposit, occurring in the Late Triassic and Early Cretaceous, influenced by post-collision tectonics and extensional settings after tectonic events in the region.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Yusuke Miyajima, Michal Jakubowicz, Jolanta Dopieralska, Akihiro Kano, Robert G. Jenkins, Zdzislaw Belka, Takafumi Hirata
Summary: This study investigates the hydrogeological regime and structural evolution of the Cretaceous subduction zone in Hokkaido, Japan, by analyzing the timing and migration pathways of fluids emitted at ancient methane seeps. Results show that two fluid discharge events occurred during the accretionary stages, originating from the forearc basin rather than the underplating materials. The seeping fluids experienced interactions with the mafic rocks of the lower Sorachi ophiolite and siliciclastic sediments of the Yezo Group.
Article
Geosciences, Multidisciplinary
Hao-Xiang Zhang, Shao-Yong Jiang, Si-Qi Liu, Feng Yuan
Summary: We investigated the trace elements, U-Pb, and Sm-Nd isotope systems of accessory minerals from the Huangjiagou Paleoproterozoic rare-earth pegmatite to determine the timing of magmatism and the overprinted metamorphic and hydrothermal events. Our study provides insights into the behavior of these accessory minerals during metamorphism and fluid-rock reaction under hydrothermal conditions. We identified two periods of accessory minerals and found that the Sm-Nd isotopic system of magmatic allanite remains robust despite later metamorphism and metasomatism disturbances.
PRECAMBRIAN RESEARCH
(2023)
Article
Geology
Ling Xing, Wenchang Li, Jun Liu, Mei Zang, Fucheng Yang, Hang Liu, Weiguo Liu, Li Guo, Bing Liu
Summary: The Qukulekedong Au-Sb deposit is the first large Au-Sb deposit discovered in the western section of the East Kunlun Orogenic Belt. This study integrated a regional geological survey and the analysis of deposit characteristics with newly acquired geochemical data to gain insights into the chronology and genesis of this deposit. The results show that the deposit was formed in a Late Triassic post-collision extensional background and is related to crust-derived magmatic activity.
ORE GEOLOGY REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Hadi Shafaii Moghadam, Qiu-Li Li, Xian-Hua Li, Massimo Chiaradia, Orhan Karsli, Kaj A. Hoernle, William L. Griffin
Summary: Most continental arcs have episodic behavior with high-flux magmatic events and overall low rate of magmatism. The causes of these events are still enigmatic. The Cenozoic magmatic arcs of Iran provide a good opportunity to study the geochemical and isotopic feedback of magmatic pulses. The high magmatic fluxes in NE Iran were mainly caused by Eocene slab steepening after Paleocene flat-slab subduction. Rating: 8/10
Article
Geology
Cem Yucel, Emre Aydincakir, Abdullah Kaygusuz, Mehmet Arslan, Keewook Yi, Youn-Joong Jeong, Derya Cicerali
Summary: The Late Cretaceous magmatic activity in the Eastern Pontides Orogenic Belt of NE Turkey was characterized by the intrusion of I-type and A-type plutons. A-type plutons from the Sebinkarahisar area, with ages of approximately 77.36 +/- 0.96 Ma, display characteristics of enrichment in K2O and Na2O, Ga, Zr, and strong negative Eu anomalies. These plutons were formed in an extensional tectonic environment and were sourced from a metasomatized lithospheric mantle and juvenile crust.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Zhihua Li, Bile Li, Peng Li, Yaming Sun, Yufan Shi
Summary: The Heishishan skarn Cu-Pb-Zn deposit is located in the East Kunlun Orogenic Belt and is associated with the Heishishan monzogranite and marble of the Jinshuikou Group. Geochemical analysis indicates that the monzogranite represents a crust-mantle magma mixing origin, while the granodiorite originated from partial melting of the lower crust. The ore-forming rock is determined based on the spatial contact relationship, geochemistry, and magma fertility. The metallogenic epoch of 241.7 Ma is under the subduction tectonic setting of the PaleoTethys Ocean.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
M. E. Bickford, W. R. Van Schmus, K. E. Karlstrom, P. A. Mueller, G. D. Kamenov
PRECAMBRIAN RESEARCH
(2015)
Article
Geosciences, Multidisciplinary
Adejardo Francisco da Silva Filho, Ignez de Pinho Guimaraes, Lucilene Santos, Richard Armstrong, William Randall Van Schmus
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2016)
Article
Geosciences, Multidisciplinary
Renata da Silva Schmitt, Rudolph Trouw, William Randall Van Schmus, Richard Armstrong, Natasha S. Gomes Stanton
BRAZILIAN JOURNAL OF GEOLOGY
(2016)
Article
Geosciences, Multidisciplinary
Christopher M. Fisher, Staci L. Loewy, Calvin F. Miller, Peter Berquist, W. Randall Van Schmus, Robert D. Hatcher, Joseph L. Wooden, Paul D. Fullagar
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2010)
Article
Geology
Adejardo Francisco da Silva Filho, Ignez de Pinho Guimaraes, William Randall Van Schmus, Elton Dantas, Richard Armstrong, Lorena Concentino, Dayse Lima
INTERNATIONAL GEOLOGY REVIEW
(2013)
Article
Geosciences, Multidisciplinary
A. F. Da Silva Filho, I. P. Guimares, W. R. Van Schmus, R. A. Armstrong, J. M. Rangel da Silva, L. S. Osako, L. M. Cocentino
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2014)
Article
Geosciences, Multidisciplinary
M. Bouyo Houketchang, S. F. Toteu, E. Deloule, J. Penaye, W. R. Van Schmus
JOURNAL OF AFRICAN EARTH SCIENCES
(2009)
Article
Geosciences, Multidisciplinary
Ticiano J. Saraiva dos Santos, Allen H. Fetter, P. C. Hackspacher, W. R. Van Schmus, J. A. Nogueira Neto
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2008)
Article
Geosciences, Multidisciplinary
W. R. Van Schmus, M. Kozuch, B. B. de Brito Neves
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2011)
Editorial Material
Geosciences, Multidisciplinary
L. G. Medaris, R. H. Dott, B. S. Singer, W. R. Van Schmus, D. K. Holm
PRECAMBRIAN RESEARCH
(2008)
Article
Geosciences, Multidisciplinary
Ignez Pinho Guimaraes, William R. Van Schmus, Benjamin B. de Brito Neves, Sheila M. Bretas Bittar, Adejardo F. Silva Filho, Richard Armstrong
PRECAMBRIAN RESEARCH
(2012)
Article
Environmental Sciences
F. M. Talarico, E. Stump, B. F. Gootee, K. A. Foland, R. Palmeri, W. R. Van Schmus, P. K. Brand, C. A. Ricci
Article
Geosciences, Multidisciplinary
W. R. Van Schmus, D. A. Schneider, D. K. Holm, S. Dodson, B. K. Nelson
PRECAMBRIAN RESEARCH
(2007)
Review
Geosciences, Multidisciplinary
David A. Gonzales, W. R. Van Schmus
PRECAMBRIAN RESEARCH
(2007)