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150 results
2020
Middleton J, Mukhopadhyay, Costa K, Pavia F, Winckler, McManus J, D’Almeida, Langmuir, Huybers P. The spatial footprint of hydrothermal scavenging on 230ThXS-derived mass accumulation rates. Geochimica et Cosmochimica Acta. 2020.
Middleton J, Mukhopadhyay, Costa K, Pavia F, Winckler, McManus J, D’Almeida, Langmuir, Huybers P. The spatial footprint of hydrothermal scavenging on 230ThXS-derived mass accumulation rates. Geochimica et Cosmochimica Acta. 2020.
Mid-ocean ridges are valuable archives of sedimentary flux records used to investigate atmospheric, oceanographic, and solid Earth responses to climate variability. Constant flux proxies, such as extraterrestrial helium-3 (3HeET) and excess thorium-230 (2...
Boulahanis, Carbotte S, Huybers P, Nedimović M, Aghaei, Canales J, Langmuir. Do sea level variations influence mid-ocean ridge magma supply? A test using crustal thickness and bathymetry data from the East Pacific Rise. Earth and Planetary Science Letters. 2020;535:116–121.
Boulahanis, Carbotte S, Huybers P, Nedimović M, Aghaei, Canales J, Langmuir. Do sea level variations influence mid-ocean ridge magma supply? A test using crustal thickness and bathymetry data from the East Pacific Rise. Earth and Planetary Science Letters. 2020;535:116–121.
Recent studies suggest that eustatic sea level fluctuations induced by glacial cycles in the Pleistocene influence mantle-melting and volcanic eruptions at mid-ocean ridges, with models predicting variations in oceanic crustal thickness and seafloor...
2019
Park S, Langmuir C, Sims KWW, Blichert-Toft, Kim S, Scott S, Lin, Choi, Yang Y, Michael P. An isotopically distinct Zealandia–Antarctic mantle domain in the Southern Ocean. Nature Geoscience. 2019;12(3):206–214.
Park S, Langmuir C, Sims KWW, Blichert-Toft, Kim S, Scott S, Lin, Choi, Yang Y, Michael P. An isotopically distinct Zealandia–Antarctic mantle domain in the Southern Ocean. Nature Geoscience. 2019;12(3):206–214.
Article | Published: 28 January 2019
An isotopically distinct Zealandia–Antarctic mantle domain in the Southern OceanMallick S, Salters V, Langmuir C. Geochemical variability along the northern East Pacific Rise: Coincident source composition and ridge segmentation. Geochemistry, Geophysics, Geosystems. 2019.
Mallick S, Salters V, Langmuir C. Geochemical variability along the northern East Pacific Rise: Coincident source composition and ridge segmentation. Geochemistry, Geophysics, Geosystems. 2019.
New trace element abundances and isotope compositions for more than 100 mid‐ocean ridge basalts from 5.5°N to 19°N on the East Pacific Rise show step function variations in isotopic composition along the ridge axis that coincide with ridge discontinuities...
2018
Middleton JL, Mukhopadhyay S, Langmuir CH, McManus JF, Huybers PJ. Millennial-scale variations in dustiness recorded in Mid-Atlantic sediments from 0 to 70 ka. Earth and Planetary Science Letters. 2018;482:12–22. doi:https://doi.org/10.1016/j.epsl.2017.10.034
Middleton JL, Mukhopadhyay S, Langmuir CH, McManus JF, Huybers PJ. Millennial-scale variations in dustiness recorded in Mid-Atlantic sediments from 0 to 70 ka. Earth and Planetary Science Letters. 2018;482:12–22. doi:https://doi.org/10.1016/j.epsl.2017.10.034
Sedimentary records of dust deposition in the subtropical Atlantic provide important constraints on millennial- and orbital-scale variability in atmospheric circulation and North African aridity. Constant flux proxies, such as extraterrestrial helium-3...
Le Voyer, Hauri EH, Cottrell, Kelley, Salters V, Langmuir C, Hilton D, Barry P, Füri. Carbon Fluxes and Primary Magma CO2 Contents Along the Global Mid‐Ocean Ridge System. Geochemistry, Geophysics, Geosystems. 2018;20(3).
Le Voyer, Hauri EH, Cottrell, Kelley, Salters V, Langmuir C, Hilton D, Barry P, Füri. Carbon Fluxes and Primary Magma CO2 Contents Along the Global Mid‐Ocean Ridge System. Geochemistry, Geophysics, Geosystems. 2018;20(3).
The concentration of carbon in primary mid‐ocean ridge basalts (MORBs), and the associated fluxes of CO2 outgassed at ocean ridges, is examined through new data obtained by secondary ion mass spectrometry (SIMS) on 753 globally distributed MORB glasses...
Kosta K, Anderson R, McManus J, Winckler, Middleton J, Langmuir. Trace element (Mn, Zn, Ni, V) and authigenic uranium (aU) geochemistry reveal sedimentary redox history on the Juan de Fuca Ridge, North Pacific Ocean. Geochimica et Cosmochimica Acta. 2018;(236):79–98.
Kosta K, Anderson R, McManus J, Winckler, Middleton J, Langmuir. Trace element (Mn, Zn, Ni, V) and authigenic uranium (aU) geochemistry reveal sedimentary redox history on the Juan de Fuca Ridge, North Pacific Ocean. Geochimica et Cosmochimica Acta. 2018;(236):79–98.
Changes in meridional overturning circulation and water mass chemistry can be recorded by oxygen concentrations in the deep ocean. Because the deep Pacific is the largest ocean reservoir, its oxygen concentrations may be related to global climate change...
Wu, Li Z, Zhou J, Mao, Langmuir C, Wang, Zhang, Gao, Chen R, Lin, et al. Petrogenesis of the Late Mesozoic Magnesian and Ferroan Granites in Northwest Zhejiang, Southeast China, and Their Implications. The Journal of Geology. 2018;126(4):407–425.
Wu, Li Z, Zhou J, Mao, Langmuir C, Wang, Zhang, Gao, Chen R, Lin, et al. Petrogenesis of the Late Mesozoic Magnesian and Ferroan Granites in Northwest Zhejiang, Southeast China, and Their Implications. The Journal of Geology. 2018;126(4):407–425.
Northwest Zhejiang Province (NWZJ) is located in the southeastern Lower Yangtze River Belt, southeastern China. Here we document the occurrence of both magnesian (149–131 Ma) and ferroan (162–121 Ma) granitoids in NWZJ. The magnesian granitoids are calc...
Wu, Qi, Perfit M, Gao, Langmuir C, Wanless V, Yu, Huang. Vanadium isotope compositions of mid-ocean ridge lavas and altered oceanic crust. Earth and Planetary Science Letters. 2018;493:128–139.
Wu, Qi, Perfit M, Gao, Langmuir C, Wanless V, Yu, Huang. Vanadium isotope compositions of mid-ocean ridge lavas and altered oceanic crust. Earth and Planetary Science Letters. 2018;493:128–139.
Vanadium isotope compositions of igneous rocks have the potential to constrain variations of physico-chemical conditions such as oxidation states during magmatism. Here, we present V isotope data for 27 fresh lavas (ranging from basaltic to dacitic...
2017
al D. Light Stable Isotopic Compositions of Enriched Mantle Sources:Resolving the Dehydration Paradox. Goechemistry Geophysics Geosystems. 2017.
al D. Light Stable Isotopic Compositions of Enriched Mantle Sources:Resolving the Dehydration Paradox. Goechemistry Geophysics Geosystems. 2017.
Costa KM, McManus JF, Middleton JL, Langmuir CH, Huybers PJ, Winckler G, Mukhopadhyay S. Hydrothermal deposition on the Juan de Fuca Ridge over multiple glacial–interglacial cycles. Earth and Planetary Science Letters. 2017;479:120–132. doi:https://doi.org/10.1016/j.epsl.2017.09.006
Costa KM, McManus JF, Middleton JL, Langmuir CH, Huybers PJ, Winckler G, Mukhopadhyay S. Hydrothermal deposition on the Juan de Fuca Ridge over multiple glacial–interglacial cycles. Earth and Planetary Science Letters. 2017;479:120–132. doi:https://doi.org/10.1016/j.epsl.2017.09.006
Hydrothermal systems play an important role in modern marine chemistry, but little is known about how they may have varied on 100,000 year timescales. Here we present high-resolution records of non-lithogenic metal fluxes within sediment cores covering...
Turner SJ, Langmuir CH, Dungan MA, Escrig S. The importance of mantle wedge heterogeneity to subduction zone magmatism and the origin of EM1. Earth and Planetary Science Letters. 2017;472:216–228. doi:https://doi.org/10.1016/j.epsl.2017.04.051
Turner SJ, Langmuir CH, Dungan MA, Escrig S. The importance of mantle wedge heterogeneity to subduction zone magmatism and the origin of EM1. Earth and Planetary Science Letters. 2017;472:216–228. doi:https://doi.org/10.1016/j.epsl.2017.04.051
The composition of the convecting asthenospheric mantle that feeds the mantle wedge can be investigated via rear-arc lavas that have minimal slab influence. This “ambient mantle wedge” composition (the composition of the wedge prior to the addition of a...