4.6 Article

Extensive melting of ancient depleted oceanic mantle evidenced by decoupled Hf-Nd isotopes in the lowermost oceanic crust

Related references

Note: Only part of the references are listed.
Article Geochemistry & Geophysics

Effective global mixing of the highly siderophile elements into Earth's mantle inferred from oceanic abyssal peridotites

Marine Paquet et al.

Summary: Late accretion on Earth led to potential heterogeneity in highly siderophile elements distribution within the mantle. Recent research showed that despite differences in spreading rate, abyssal peridotites from various mid-ocean ridges exhibit similar behavior in terms of HSE distribution and Os isotopes, indicating efficient mixing in Earth's mantle for these elements.

GEOCHIMICA ET COSMOCHIMICA ACTA (2022)

Article Geosciences, Multidisciplinary

An intracontinental orogen exhumed by basement-slice imbrication in the Longmenshan Thrust Belt of the Eastern Tibetan Plateau

Zhenhua Xue et al.

Summary: The Longmenshan Thrust Belt in Eastern Tibet was formed during a Mesozoic orogeny and Cenozoic reworking. Detailed structural analysis reveals that the thrust belt can be divided into a Southeastern Zone and a Northwestern Zone, both of which experienced major tectonic events. Geological data suggests that episodic imbrication of basement slices occurred during the Late Jurassic-Early Cretaceous and Late Cretaceous-earliest Paleocene, leading to the exhumation of amphibolite facies rocks.

GEOLOGICAL SOCIETY OF AMERICA BULLETIN (2022)

Article Geosciences, Multidisciplinary

Subduction initiation triggered by accretion of a Jurassic oceanic plateau along the Bangong-Nujiang Suture in central Tibet

Wei-Qi Zhang et al.

Summary: Lower crusts of oceanic plateaus are rarely studied, but research on the Pengco Complex in central Tibet reveals the presence of lower crust from an oceanic plateau formed around 188 Ma. The lower crust has distinct mineral crystallization and geochemical features, indicating a different origin than mid-ocean ridge cumulates.

TERRA NOVA (2021)

Article Geochemistry & Geophysics

Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu-Bonin Arc From IOPD Expedition 352

John W. Shervais et al.

Summary: The International Ocean Discovery Program Expedition 352 collected comprehensive data on over 800 meters of in situ oceanic crust comprising boninite and boninite-series lavas in the Izu-Bonin forearc. The lavas were categorized into high-silica boninite, low-silica boninite, and basaltic boninite based on their chemical compositions, with distinct axial and off-axis lava types identified through chemostratigraphic analysis. This study provides insights into the origins and petrogenesis of these unusual boninite lavas in the forearc setting.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2021)

Article Geochemistry & Geophysics

Recycling of ancient sub-oceanic mantle in the Neo-Tethyan asthenosphere: Evidence from major and trace elements and Hf-Os isotopes of the Kop Mountain ophiolite, NE Turkey

Tong Liu et al.

Summary: The asthenosphere beneath ancient and modern oceans is heterogeneous due to the recycling of old mantle domains and subducted oceanic crust and sediments. The mantle peridotites from the Kop Mountain ophiolite in the Neo-Tethys underwent ancient melt extraction and Jurassic melt metasomatism, representing recycled ancient sub-oceanic mantle domains. The Os isotopic distribution of Neo-Tethyan ophiolites is similar to global abyssal peridotites, indicating a highly heterogeneous asthenosphere with various mantle inputs.

GEOCHIMICA ET COSMOCHIMICA ACTA (2021)

Article Multidisciplinary Sciences

Competing effects of spreading rate, crystal fractionation and source variability on Fe isotope systematics in mid-ocean ridge lavas

Marianne Richter et al.

Summary: Two-thirds of the Earth is covered by mid-ocean ridge basalts, which show chemical diversity mainly attributed to igneous differentiation and source heterogeneity. This study reveals that basalts from the ultraslow spreading Gakkel Ridge in the Arctic Ocean are driven to heavier iron isotope compositions through partial melting processes, contrasting with fast spreading ridges.

SCIENTIFIC REPORTS (2021)

Article Geochemistry & Geophysics

MORB Melt Transport through Atlantis Bank Oceanic Batholith (SW Indian Ridge)

Wei-Qi Zhang et al.

Summary: The Atlantis Bank Oceanic Batholith is a 660 km(2) gabbro massif representing the plutonic foundation of a major ridge magmatic center. Drill core data suggests that the chromian-spinel-bearing troctolites were formed by reactions within a spinel-bearing mush, while the olivine gabbros show reactive flow of melts through the cooling crystal mush zone.

JOURNAL OF PETROLOGY (2021)

Article Geochemistry & Geophysics

Ancient refractory asthenosphere revealed by mantle re-melting at the Arctic Mid Atlantic Ridge

Alessio Sanfilippo et al.

Summary: The upper mantle is a mixture of refractory and recycled crustal domains, with the recycled portions dominating the composition of surface basalts. Hf isotope ratios may provide hints for melting of refractory source materials in basalts, allowing the identification of depleted mantle materials. Basalts from the Arctic Atlantic show high Hf isotope ratios, suggesting a highly depleted asthenospheric mantle source beneath this region.

EARTH AND PLANETARY SCIENCE LETTERS (2021)

Article Geochemistry & Geophysics

The nature and origin of upper mantle heterogeneity beneath the Mid-Atlantic Ridge 33-35°N: A Sr-Nd-Hf isotopic perspective

Pengyuan Guo et al.

Summary: The study provides new Sr-Nd-Hf isotopic data on mid-ocean ridge basalts from the Oceanographer and Hayes fracture zones at the Mid-Atlantic Ridge to constrain the nature and origin of upper mantle heterogeneity. The data illustrate that the mantle sources of these lavas comprise three components, including ADM, E-type I, and E-type II components, which explain the contrast in crustal thickness, ridge morphology, and mantle Bouguer anomalies between the two ridge segments.

GEOCHIMICA ET COSMOCHIMICA ACTA (2021)

Article Multidisciplinary Sciences

A subduction influence on ocean ridge basalts outside the Pacific subduction shield

A. Y. Yang et al.

Summary: The plate tectonic cycle produces chemically distinct mid-ocean ridge basalts and arc volcanics, with the latter enriched in specific elements due to water-rich flux from subduction. The influence of subduction can be identified in Arctic Gakkel Ridge samples, indicating a pervasive subduction effect in the region and an absence of it in Pacific mid-ocean ridge basalts. The geographical distribution of subduction-modified mantle heterogeneity is controlled by a long-standing subduction shield around the Pacific Ocean.

NATURE COMMUNICATIONS (2021)

Article Multidisciplinary Sciences

Recycled arc mantle recovered from the Mid-Atlantic Ridge

B. M. Urann et al.

NATURE COMMUNICATIONS (2020)

Article Geochemistry & Geophysics

Role of ancient, ultra-depleted mantle in Mid-Ocean-Ridge magmatism

A. Sanfilippo et al.

EARTH AND PLANETARY SCIENCE LETTERS (2019)

Article Geosciences, Multidisciplinary

Highly heterogeneous depleted mantle recorded in the lower oceanic crust

Sarah Lambart et al.

NATURE GEOSCIENCE (2019)

Article Geochemistry & Geophysics

Magmatic evolution biases basaltic records of mantle chemistry towards melts from recycled sources

David A. Neave et al.

EARTH AND PLANETARY SCIENCE LETTERS (2019)

Article Geosciences, Multidisciplinary

Ubiquitous ultra-depleted domains in Earth's mantle

Andreas Stracke et al.

NATURE GEOSCIENCE (2019)

Article Geosciences, Multidisciplinary

Neoproterozoic sedimentary rocks track the location of the Lhasa Block during the Rodinia breakup

Xiang Zhou et al.

PRECAMBRIAN RESEARCH (2019)

Article Geochemistry & Geophysics

Isotopic variation in Semail Ophiolite lower crust reveals crustal-level melt aggregation

M. N. Jansen et al.

GEOCHEMICAL PERSPECTIVES LETTERS (2018)

Article Multidisciplinary Sciences

Boninite-like intraplate magmas from Manihiki Plateau require ultra-depleted and enriched source components

Roman Golowin et al.

NATURE COMMUNICATIONS (2017)

Article Geochemistry & Geophysics

Hf-Nd isotope decoupling in bulk abyssal peridotites due to serpentinization

Carl Frisby et al.

CHEMICAL GEOLOGY (2016)

Article Geochemistry & Geophysics

Precise Determination of Sm and Nd Concentrations and Nd Isotopic Compositions in Highly Depleted Ultramafic Reference Materials

Zhuyin Chu et al.

GEOSTANDARDS AND GEOANALYTICAL RESEARCH (2014)

Article Geochemistry & Geophysics

Central Tibetan Meso-Tethyan oceanic plateau

Kai-Jun Zhang et al.

LITHOS (2014)

Article Geochemistry & Geophysics

Atypically depleted upper mantle component revealed by Hf isotopes at Lucky Strike segment

Cedric Hamelin et al.

CHEMICAL GEOLOGY (2013)

Article Geochemistry & Geophysics

Age and geochemistry of the oceanic Manihiki Plateau, SW Pacific: New evidence for a plume origin

Christian Timm et al.

EARTH AND PLANETARY SCIENCE LETTERS (2011)

Article Geochemistry & Geophysics

Abyssal peridotite Hf isotopes identify extreme mantle depletion

A. Stracke et al.

EARTH AND PLANETARY SCIENCE LETTERS (2011)

Article Geochemistry & Geophysics

Geochemical Composition of K-rich Lavas from the Lena Trough (Arctic Ocean)

F. Nauret et al.

JOURNAL OF PETROLOGY (2011)

Article Geochemistry & Geophysics

Wrangellia flood basalts in Alaska: A record of plume-lithosphere interaction in a Late Triassic accreted oceanic plateau

Andrew R. Greene et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2008)

Article Multidisciplinary Sciences

Ancient, highly heterogeneous mantle beneath Gakkel ridge, Arctic Ocean

Chuan-Zhou Liu et al.

NATURE (2008)

Article Geosciences, Multidisciplinary

Role of recycled oceanic basalt and sediment in generating the Hf-Nd mantle array

Catherine Chauvel et al.

NATURE GEOSCIENCE (2008)

Article Geochemistry & Geophysics

Hf-Nd isotope decoupling in the oceanic lithosphere: constraints from spinel peridotites from Oahu, Hawaii

M Bizimis et al.

EARTH AND PLANETARY SCIENCE LETTERS (2004)

Article Geochemistry & Geophysics

A fossil melt lens in the Oman ophiolite: Implications for magma chamber processes at fast spreading ridges

CJ MacLeod et al.

EARTH AND PLANETARY SCIENCE LETTERS (2000)