RR
Member Since 1982
Roberta L. Rudnick
Distinguished Professor, University of California Santa Barbara
AGU Research
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To the lower crust and back again: a tectonic history of metasedimentary xenoliths from the Eocene Missouri Breaks diatremes, central Montana
RATES AND DATES OF LITHOSPHERIC PROCESSES II ORAL
tectonophysics | 15 december 2023
Mary S. Ringwood, Sophia E. Ortner, Gareth Seward,...
Metapelitic xenoliths carried within the Missouri Breaks diatremes in central Montana, USA, document an ~1800 Ma history of sediment deposition, tecto...
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REE and Radiogenic Sr, Nd Isotopic Variability in Saprolites formed on Metadiabase: Implications for REE Mobility and Age of Saprolitization
TOPICS IN VOLCANOLOGY, GEOCHEMISTRY, AND PETROLOGY II POSTER
volcanology, geochemistry and petrology | 15 december 2023
Utpalendu Haldar, Ramananda Chakrabarti, Roberta L...
We report trace element concentration, 143Nd/144Nd and 87Sr/86Sr in saprolites developed on the Mesozoic subvertical, 7 m thick Cayce metadiabase dike...
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The role of scapolite in sequestering SO3 and CO2 in the lower crust and implications for S isotope signatures of crustal fluids.
VOLATILES AND CHALCOPHILES FROM MANTLE TO SURFACE: SOURCES, TRANSPORT, AND MAGMATIC-HYDROTHERMAL RELEASE I ORAL
volcanology, geochemistry and petrology | 14 december 2023
Johannes Haemmerli, Anthony I. Kemp, Anne-Sophie B...
Scapolite group minerals rich in SO3 and/or CO2 (Ca4Al6Si6O24SO4 - Ca4A16Si6024CO3) are common in lower crustal rocks, such as granulites. Scapolite m...
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Halogen (F, Cl, Br, and I) Systematics in Loess: Implications for Halogen Enrichments at Earth’s Land Surface
ORIGIN, DISTRIBUTION, AND TRANSPORT OF VOLATILES IN EARTH AND TERRESTRIAL PLANETS I POSTER
volcanology, geochemistry and petrology | 11 december 2023
Pengyuan Han, Roberta L. Rudnick, Zhaochu Hu, Tao ...
Halogens (F, Cl, Br, and I) mainly reside on Earths surface and play a critical role in modulating the habitability of the Earth. However, their behav...
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Temporal evolution of the upper continental crust revealed by potassium isotope geochemistry of glacial diamictites
THE ARCHEAN: CRUSTAL EVOLUTION AND PLANETARY HABITABILITY II POSTER
volcanology, geochemistry and petrology | 11 december 2023
Tianyi Huang, Fang-zhen Teng, Roberta L. Rudnick, ...
To investigate the possible secular change in the composition of the upper crust, we analyzed the stable K isotope composition of glacial diamictite c...
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Significant Variability in 87Sr/86Sr and δ88/86Sr in Saprolites: Implications for Timing of Weathering and Secondary Mineral formation
TOPICS IN VOLCANOLOGY GEOCHEMISTRY AND PETROLOGY II POSTER
volcanology, geochemistry and petrology | 12 december 2022
Utpalendu Haldar, Sourav Ganguly, Ramananda Chakra...
The Cayce diabase saprolite in South Carolina formed during the Mesozoic and is well characterized in terms of its mineralogy and isotopic composition...
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Heat Transfer and Production in Cratonic Continental Crust: U‐Pb Thermochronology of Xenoliths From the Siberian Craton
GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS
19 october 2022
Francisco Apen, Roberta L. Rudnick, Dmitri Ionov, ...
Coupled U‐Pb and trace‐element analyses of accessory phases in crustal xenoliths from the Late Devonian Udachnaya kimberlite (Siberian ...
Secular Rb/Sr Evolution of the Upper Continental Crust as Constrained Through Radiogenic Sr Isotopes in Glacial Diamictites.
EVOLUTION OF THE EARTH SYSTEM I ORAL
paleoceanography and paleoclimatology | 15 december 2021
Utpalendu Haldar, Ramananda Chakrabarti, Roberta L...
The strontium paradox refers to the low depositional 87Sr/86Sr observed in sediments with depositional ages ranging from late Precambrian to recent, d...
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