Article
Geochemistry & Geophysics
James M. D. Day, Kimberley L. R. Nutt, Brendon Mendenhall, Bradley J. Peters
Summary: The Steens Formation in the Columbia River Basalt Group represents one of the earliest and most primitive eruptive products, showing compositions originating from a relatively depleted mantle source with no compelling evidence for a subducted slab component but increasing crustal contamination over time. This suggests a progressive increase in the amounts of crustal contamination and potential CO2 degassing during the later stages of CRBG magmatism, contributing to climate change during the mid-Miocene Climatic Optimum.
Article
Geochemistry & Geophysics
Jordan J. Lindsay, Jens C. O. Andersen, Hannah S. R. Hughes, Iain McDonald, Alan R. Hastie, Marcell L. Besser, Otavio A. B. Licht, Edir E. Arioli
Summary: This study analyzed plume-derived basalts from the Brazilian side of the PELIP, revealing three distinct metallogenic groupings and explaining the compositional variations in the melts through trace element melt modeling.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geosciences, Multidisciplinary
Junaid Khan, Huazhou Yao, Junhong Zhao, Qiwei Li, Wenshuai Xiang, Junsheng Jiang, Asma Tahir
Summary: The central Ethiopian Plateau is characterized by the presence of voluminous Choke Shield basalts and flood basalts. These basalts have tholeiitic composition and exhibit geochemical features similar to ocean island basalts (OIB). The Choke Shield basalts, formed around 23 Ma, display a range of chemical compositions and show enrichment of certain trace elements in primitive mantle-normalized diagrams. The flood basalts, formed around 24 Ma, also exhibit similar composition trends but with slightly different elemental abundances. Both types of basalts experienced contamination from crustal materials and underwent fractional crystallization. The mantle source beneath the central Ethiopian Plateau during the Tertiary period was heterogeneous, consisting of different end-members formed through metasomatism.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Joseph Biasi, Leif Karlstrom
Summary: This study developed a magnetic geothermometer method using paleomagnetic data and thermal modeling to constrain the active transport lifetime of flood basalts. Results indicate that some dike segments of flood basalts were actively heating host rocks for a short period of time, while others may have been active for several years.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Vanessa M. Swenton, Martin J. Streck, Daniel P. Miggins, William C. McIntosh
Summary: The Miocene rhyolitic volcanism in eastern Oregon, USA, can be divided into two main episodes, one concurrent with the Columbia River Basalt Group (CRBG) lavas and the other related to the later stage of CRBG volcanic activity. These data reveal the timing, duration, and influencing factors of volcanic activity in the region.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Vanessa M. Swenton, Martin J. Streck, Daniel P. Miggins, William C. McIntosh
Summary: The Miocene rhyolitic volcanism in eastern Oregon, USA, can be divided into two main episodes, the Columbia River Basalt Group (CRBG) lavas and coeval silicic volcanism (>16.5-15 Ma) and the High Lava Plains province (12-0 Ma). New data suggests that these two episodes occurred at different times and were influenced by different tectonic activities and geological factors.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Review
Geology
Yang Zhen, Wang GuiQin, Xu YuMing, Zeng YuLing
Summary: The challenge of studying the Earth's core-mantle interaction is that samples at the boundary between the core and mantle cannot be obtained using current technology. Ocean island basalts and flood basalts are considered to be the best samples for researching this interaction. W-182 isotope has unique geochemical properties and is an important tool for studying the Earth's core-mantle interaction. However, the mechanism of W isotope exchange between the core and mantle is still controversial.
ACTA PETROLOGICA SINICA
(2022)
Article
Geosciences, Multidisciplinary
Tilahun Tamirat, Takele Chekol, Daniel Meshesha
Summary: Petrography and geochemical data of basaltic lavas from the north western Ethiopian plateau reveal three distinct groups: Alkali, tholeiitic, and transitional basalts. These groups show significant variations in major and trace element compositions, with the alkali and transitional basalts resembling oceanic island basalts and the tholeiitic basalts showing similarities to enriched mid oceanic ridge basalts. This suggests a complex mantle source involving components from OIB, E-MORB, and SCLM, leading to considerable source heterogeneity within and among the basaltic groups.
JOURNAL OF AFRICAN EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Saskia Ruttor, Oliver Nebel, Yona Nebel-Yacobsen, Benjamin E. Cohen, Stephen Eggins
Summary: The research suggests that Tasmantid Seamount lavas exhibit dichotomy in alkalinity and form a continuum between EM1 and PREMA in radiogenic isotope systems, indicating a unique character of the Tasmantid plume. Furthermore, stable Fe isotopes point towards residual garnet as a key factor influencing the relationship between degrees of melting and Fe isotopes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Qi-Wei Hu, Sheng-Wang Mei, Le Zhang, Zhong-Yuan Ren
Summary: In this study, the trace element and Pb-Sr isotope compositions of olivine-hosted melt inclusions in Hainan basalts were analyzed to understand the mantle source and the mixing processes. The results showed that FOZO, EM2, and EM1 are the main mantle components in the Hainan mantle plume, while HIMU components play a minor role. Recycled oceanic crust and sediments were found to have a significant contribution to the mantle source.
Article
Geosciences, Multidisciplinary
Emily B. Cahoon, Martin J. Streck, Anthony A. P. Koppers
Summary: This study reassesses the spatial distribution and eruptive volume of the Picture Gorge Basalt (PGB) and finds that the eruptive volume is more than double the previous estimates. The study also identifies differences in the chemical characteristics of PGB compared to other Columbia River Basalt Group (CRBG) formations, suggesting a distinct magmatic source for PGB.
Article
Geosciences, Multidisciplinary
Emily B. Cahoon, Martin J. Streck, Anthony A. P. Koppers
Summary: The Picture Gorge Basalt (PGB) of the Columbia River Basalt Group (CRBG) has a much larger eruptive volume and distribution than previously estimated, and it is the earliest and longest eruptive unit compared to other main-phase CRBG formations. Extensive field observations and geochemical data analysis reveal a wider distribution of PGB lava flows and mafic dikes, with new correlations found between previously identified flows. The revised distribution and eruptive volume of PGB are estimated to be at least 4200 km(3).
Article
Geochemistry & Geophysics
Chenguang Sun, Rajdeep Dasgupta
Summary: The carbon content of the convecting mantle, the Earth's largest carbon reservoir, is uncertain. To fill this knowledge gap, a global assessment of CO2 in ocean island basalts (OIBs) is necessary. However, limited samples and debates on the origin of OIBs hinder this approach. This study examines the origin of silica-poor, alkaline OIBs and constrains CO2 in the primary melts of global OIBs. Rating: 8/10.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Fanchao Meng, Yulu Tian, Andrew C. Kerr, Wei Wang, Zhiping Wu, Qiang Xu, Qing Du, Yaoqi Zhou, Jiaqi Liu
Summary: Plume-lithosphere interactions play a significant role in the formation of Large Igneous Provinces (LIPs). This study focuses on the Permian Emeishan Large Igneous Province (ELIP) and the role of plume-lithosphere interaction in the formation of basalts in the outer zone. The research findings suggest that the high-Ti basalts in the Sichuan Basin are different from those in the inner zone, indicating different plume-lithosphere interactions in different parts of the ELIP.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Environmental Sciences
Katie E. Hughes, Amanda Wild, Eva Kwoll, Marten Geertsema, Alexandra Perry, K. Darcy Harrison
Summary: This study used remote sensing imagery, topographic surveys, and field observation to investigate a retrogressive landslide near a tributary to the Peace River in British Columbia. The landslide delivered a significant amount of sediment to the river annually and high plume activity was found to be related to increased groundwater pressure. Monitoring using readily available imagery is a feasible method for tracking the activity of this recurring landslide.
Article
Geochemistry & Geophysics
Wendy R. Nelson, Tanya Furman, Peter E. van Keken, Steven B. Shirey, Barry B. Hanan
Article
Geochemistry & Geophysics
Joerg Geldmacher, Kaj Hoernle, Barry B. Hanan, Janne Blichert-Toft, F. Hauff, James B. Gill, Hans-Ulrich Schmincke
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2011)
Article
Geochemistry & Geophysics
Cedric Hamelin, Laure Dosso, Barry B. Hanan, Manuel Moreira, Andrew P. Kositsky, Marion Y. Thomas
EARTH AND PLANETARY SCIENCE LETTERS
(2011)
Article
Geochemistry & Geophysics
Barry B. Hanan, Janne Blichert-Toft, Christophe Hemond, Kaan Sayit, Arnaud Agranier, David W. Graham, Francis Albarede
EARTH AND PLANETARY SCIENCE LETTERS
(2013)
Review
Geochemistry & Geophysics
J. G. Konter, H. Staudigel, J. Blichert-Toft, B. B. Hanan, M. Polve, G. R. Davies, N. Shimizu, P. Schiffman
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2009)
Article
Geochemistry & Geophysics
Mark K. Reagan, Osamu Ishizuka, Robert J. Stern, Katherine A. Kelley, Yasuhiko Ohara, Janne Blichert-Toft, Sherman H. Bloomer, Jennifer Cash, Patricia Fryer, Barry B. Hanan, Rosemary Hickey-Vargas, Teruaki Ishii, Jun-Ichi Kimura, David W. Peate, Michael C. Rowe, Melinda Woods
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2010)
Article
Geochemistry & Geophysics
Doshik Hahm, David R. Hilton, Paterno R. Castillo, James W. Hawkins, Barry B. Hanan, Erik H. Hauri
GEOCHIMICA ET COSMOCHIMICA ACTA
(2012)
Article
Geosciences, Multidisciplinary
Cedric Hamelin, Laure Dosso, Barry Hanan, Jean-Alix Barrat, Helene Ondreas
GEOPHYSICAL RESEARCH LETTERS
(2010)
Article
Geochemistry & Geophysics
Liyan Tian, Paterno R. Castillo, David R. Hilton, James W. Hawkins, Barry B. Hanan, Aaron J. Pietruszka
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2011)
Article
Geochemistry & Geophysics
Mark K. Reagan, Barry B. Hanan, Matthew T. Heizler, Brian S. Hartman, Rosemary Hickey-Vargas
JOURNAL OF PETROLOGY
(2008)
Article
Geochemistry & Geophysics
Tyrone O. Rooney, Barry B. Hanan, David W. Graham, Tanya Furman, Janne Blichert-Toft, Jean-Guy Schilling
JOURNAL OF PETROLOGY
(2012)
Article
Geosciences, Multidisciplinary
Liyan Tian, Paterno R. Castillo, James W. Hawkins, David R. Hilton, Barry B. Hannan, Aaron J. Pietruszka
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2008)
Article
Geosciences, Multidisciplinary
Seiko Yamasaki, Tomomi Kani, Barry B. Hanan, Takahiro Tagami
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2009)
Article
Geochemistry & Geophysics
Biltan Kurkcuoglu, Tanya Furman, Barry Hanan
Article
Oceanography
Hubert Staudigel, Anthony A. P. Koppers, Terry A. Plank, Barry B. Hanan