Abstract:
:Intraplate magmatic provinces found away from plate boundaries provide direct sampling of the composition and heterogeneity of the Earth's mantle. The chemical heterogeneities that have been observed in the mantle are usually attributed to recycling during subduction1-3, which allows for the addition of volatiles and incompatible elements into the mantle. Although many intraplate volcanoes sample deep-mantle reservoirs-possibly at the core-mantle boundary4-not all intraplate volcanoes are deep-rooted5, and reservoirs in other, shallower boundary layers are likely to participate in magma generation. Here we present evidence that suggests Bermuda sampled a previously unknown mantle domain, characterized by silica-undersaturated melts that are substantially enriched in incompatible elements and volatiles, and a unique, extreme isotopic signature. To our knowledge, Bermuda records the most radiogenic 206Pb/204Pb isotopes that have been documented in an ocean basin (with 206Pb/204Pb ratios of 19.9-21.7) using high-precision methods. Together with low 207Pb/204Pb ratios (15.5-15.6) and relatively invariant Sr, Nd, and Hf isotopes, the data suggest that this source must be less than 650 million years old. We therefore interpret the Bermuda source as a previously unknown, transient mantle reservoir that resulted from the recycling and storage of incompatible elements and volatiles6-8 in the transition zone (between the upper and lower mantle), aided by the fractionation of lead in a mineral that is stable only in this boundary layer, such as K-hollandite9,10. We suggest that recent recycling into the transition zone, related to subduction events during the formation of Pangea, is the reason why this reservoir has only been found in the Atlantic Ocean. Our geodynamic models suggest that this boundary layer was sampled by disturbances related to mantle flow. Seismic studies and diamond inclusions6,7 have shown that recycled materials can be stored in the transition zone11. For the first time, to our knowledge, we show geochemical evidence that this storage is key to the generation of extreme isotopic domains that were previously thought to be related only to deep recycling.
journal_name
Naturejournal_title
Natureauthors
Mazza SE,Gazel E,Bizimis M,Moucha R,Béguelin P,Johnson EA,McAleer RJ,Sobolev AVdoi
10.1038/s41586-019-1183-6subject
Has Abstractpub_date
2019-05-01 00:00:00pages
398-403issue
7756eissn
0028-0836issn
1476-4687pii
10.1038/s41586-019-1183-6journal_volume
569pub_type
杂志文章相关文献
NATURE文献大全abstract::(S)-2-hydroxypropylphosphonate ((S)-2-HPP) epoxidase (HppE) is a mononuclear non-haem-iron-dependent enzyme responsible for the final step in the biosynthesis of the clinically useful antibiotic fosfomycin. Enzymes of this class typically catalyse oxygenation reactions that proceed via the formation of substrate radic...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature11998
更新日期:2013-04-04 00:00:00
abstract::Ia antigens are membrane-bound glycoproteins that play a part in antigen recognition and subsequent cell-cell interactions in the immune response. In the mouse they are coded for by the I region of the major histocompatibility complex H-2 and have been demonstrated on B lymphocytes, monocytes, activated T cells, macro...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/303426a0
更新日期:1983-06-02 00:00:00
abstract:: ...
journal_title:Nature
pub_type: 评论,信件
doi:10.1038/d41586-019-00764-z
更新日期:2019-03-01 00:00:00
abstract::On the basis of their primary structure, the lysine-rich histones are a unified family of proteins. Each has an amino acid chain which falls into three distinct domains. Only the central domain (approximately 80 residues) is in a folded conformation. It is protected from trypsin digestion in chromatin and corresponds ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/288675a0
更新日期:1980-12-25 00:00:00
abstract::The application of a sufficiently strong magnetic field to a superconductor will, in general, destroy the superconducting state. Two mechanisms are responsible for this. The first is the Zeeman effect, which breaks apart the paired electrons if they are in a spin-singlet (but not a spin-triplet) state. The second is t...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/35073531
更新日期:2001-04-19 00:00:00
abstract::Numerous reports have emphasized the need for major changes in the global food system: agriculture must meet the twin challenge of feeding a growing population, with rising demand for meat and high-calorie diets, while simultaneously minimizing its global environmental impacts. Organic farming—a system aimed at produc...
journal_title:Nature
pub_type: 杂志文章,meta分析
doi:10.1038/nature11069
更新日期:2012-05-10 00:00:00
abstract::The perception of yellow has played a central role in distinguishing two main theories of colour vision. Hering proposed that yellow results from the activation of a distinct retinal-neural mechanism, whereas according to the Young-Helmholtz-Maxwell view, yellow results from the combined activation of red and green co...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/386066a0
更新日期:1997-03-06 00:00:00
abstract::Immunoprecipitation and tryptic peptide analysis of newly synthesized proteins from rat islets have identified an 18,000 molecular weight (MW) protein as proglucagon. Conversion of this precursor was kinetically similar to the conversion of proinsulin and resulted in the formation of both pancreatic glucagon and a 10,...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/282260a0
更新日期:1979-11-15 00:00:00
abstract::The Southern Ocean is very important for the potential sequestration of carbon dioxide in the oceans and is expected to be vulnerable to changes in carbon export forced by anthropogenic climate warming. Annual phytoplankton blooms in seasonal ice zones are highly productive and are thought to contribute significantly ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/35007061
更新日期:2000-04-06 00:00:00
abstract::The tumour-suppressor gene p53 is frequently mutated in human cancers and is important in the cellular response to DNA damage. Although the p53 family members p63 and p73 are structurally related to p53, they have not been directly linked to tumour suppression, although they have been implicated in apoptosis. Given th...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/416560a
更新日期:2002-04-04 00:00:00
abstract::Abundant data link hypercholesterolaemia to atherogenesis. However, only recently have we appreciated that inflammatory mechanisms couple dyslipidaemia to atheroma formation. Leukocyte recruitment and expression of pro-inflammatory cytokines characterize early atherogenesis, and malfunction of inflammatory mediators m...
journal_title:Nature
pub_type: 杂志文章,评审
doi:10.1038/nature01323
更新日期:2002-12-19 00:00:00
abstract::Transforming viral proteins such as E1A force cells through the restriction point of the cell cycle into S phase by forming complexes with two cellular proteins: the retinoblastoma protein (Rb), a transcriptional co-repressor, and CBP/p300, a transcriptional co-activator. These two proteins locally influence chromatin...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/24190
更新日期:1998-11-12 00:00:00
abstract::DNA lesions interfere with DNA and RNA polymerase activity. Cyclobutane pyrimidine dimers and photoproducts generated by ultraviolet irradiation cause stalling of RNA polymerase II, activation of transcription-coupled repair enzymes, and inhibition of RNA synthesis. During the S phase of the cell cycle, collision of r...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature05842
更新日期:2007-06-07 00:00:00
abstract::Gradual accumulation of evidence is thought to be fundamental for decision-making, and its neural correlates have been found in several brain regions. Here we develop a generalizable method to measure tuning curves that specify the relationship between neural responses and mentally accumulated evidence, and apply it t...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature14066
更新日期:2015-04-09 00:00:00
abstract::Fast radio bursts (FRBs) are millisecond-duration radio transients1,2 of unknown origin. Two possible mechanisms that could generate extremely coherent emission from FRBs invoke neutron star magnetospheres3-5 or relativistic shocks far from the central energy source6-8. Detailed polarization observations may help us t...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/s41586-020-2827-2
更新日期:2020-10-01 00:00:00
abstract::Nerve growth factor (NGF) is involved in a variety of processes involving signalling, such as cell differentiation and survival, growth cessation and apoptosis of neurons. These events are mediated by NGF as a result of binding to its two cell-surface receptors, TrkA and p75. TrkA is a receptor with tyrosine kinase ac...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/43705
更新日期:1999-09-09 00:00:00
abstract::It has long been thought that mature oligodendrocytes in the adult mammalian central nervous system (CNS) are post-mitotic and are unable to proliferate in response to injury. The implications of this have been profound, because it has been suggested that this failure of oligodendrocytes to undergo mitosis is perhaps ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/308274a0
更新日期:1984-03-15 00:00:00
abstract::Despite active transport into Earth's mantle, water has been present on our planet's surface for most of geological time. Yet water disappeared from the Martian surface soon after its formation. Although some of the water on Mars was lost to space via photolysis following the collapse of the planet's magnetic field, t...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature25031
更新日期:2017-12-20 00:00:00
abstract::Tumour necrosis factor-alpha (TNF-alpha) is a potent pro-inflammatory and immunomodulatory cytokine implicated in inflammatory conditions such as rheumatoid arthritis, Crohn's disease, multiple sclerosis and the cachexia associated with cancer or human immunodeficiency virus infection. TNF-alpha is initially expressed...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/370555a0
更新日期:1994-08-18 00:00:00
abstract::Q beta replicase, in the absence of added template, will synthesize RNA autocatalytically. A variety of small RNa species, termed '6S RNAs' are generated. As this reaction purportedly occurs in the absence of template, it has been termed 'de novo' RNA synthesis. The question of whether Q beta replicase can polymerize ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/301350a0
更新日期:1983-01-27 00:00:00
abstract::Multistranded DNA structures based upon guanine association have been proposed to be important in the structure of chromosome telomeres and in immunoglobulin class switching. Nucleic acids containing runs of guanine bases form a number of structures in vitro, including fold-back structures (Fig. 1a) and parallel-stran...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/360280a0
更新日期:1992-11-19 00:00:00
abstract::Where continental plates break apart, slip along multiple normal faults provides the required space for the Earth's crust to thin and subside. After initial rifting, however, the displacement on normal faults observed at the sea floor seems not to match the inferred extension. Here we show that crustal thinning can be...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature04608
更新日期:2006-03-16 00:00:00
abstract::The embryos and larvae of stalked crinoids, which are considered the most basal group of extant echinoderms, have not previously been described. In contrast, much is known about the development of the more accessible stalkless crinoids (feather stars), which are phylogenetically derived from stalked forms. Here we des...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature01236
更新日期:2003-01-09 00:00:00
abstract::In Drosophila melanogaster, the rRNA genes (rDNA) are clustered at single sites on two non-homologous chromosomes, the X and Y. Examination of the structure of X and Y rDNAs with restriction endonucleases reveals that the X rDNA contains repeating units not present in the Y. Such observations, as well as genetic evide...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/263027a0
更新日期:1976-09-02 00:00:00
abstract::Graphene oxide membranes-partially oxidized, stacked sheets of graphene-can provide ultrathin, high-flux and energy-efficient membranes for precise ionic and molecular sieving in aqueous solution. These materials have shown potential in a variety of applications, including water desalination and purification, gas and ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature24044
更新日期:2017-10-19 00:00:00
abstract::The autosomal dominant hyper-IgE syndrome (HIES, 'Job's syndrome') is characterized by recurrent and often severe pulmonary infections, pneumatoceles, eczema, staphylococcal abscesses, mucocutaneous candidiasis, and abnormalities of bone and connective tissue. Mutations presumed to underlie HIES have recently been ide...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature06764
更新日期:2008-04-10 00:00:00
abstract::Mycobacterium tuberculosis (Mtb) is the leading cause of death from infection worldwide1. The only available vaccine, BCG (Bacillus Calmette-Guérin), is given intradermally and has variable efficacy against pulmonary tuberculosis, the major cause of mortality and disease transmission1,2. Here we show that intravenous ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/s41586-019-1817-8
更新日期:2020-01-01 00:00:00
abstract::High-temperature superconductivity is achieved by doping copper oxide insulators with charge carriers. The density of carriers in conducting materials can be determined from measurements of the Hall voltage--the voltage transverse to the flow of the electrical current that is proportional to an applied magnetic field....
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature01890
更新日期:2003-08-21 00:00:00
abstract::53BP1 governs a specialized, context-specific branch of the classical non-homologous end joining DNA double-strand break repair pathway. Mice lacking 53bp1 (also known as Trp53bp1) are immunodeficient owing to a complete loss of immunoglobulin class-switch recombination1,2, and reduced fidelity of long-range V(D)J rec...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/s41586-018-0362-1
更新日期:2018-08-01 00:00:00
abstract::DNA fragments of chemically transformed and normal avian and murine cells induce transformation of NIH 3T3 mouse cells with low efficiencies. High molecular weight DNAs of cells transformed by DNA fragments induce transformation with high efficiencies in secondary transfection assays. It thus seems that endogenous tra...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/284418a0
更新日期:1980-04-03 00:00:00