Geology articles within Nature Communications

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  • Article
    | Open Access

    Small, frequent rockfalls are thought to dominate the erosion of mountains above rockfalls, and little is known about rare large landslides as material is rapidly reworked. Here, the authors present sub-surface data from a large rock avalanche showing how such landslides can be recognized from their deposits.

    • Stuart A. Dunning
    • , Nicholas J. Rosser
    •  & Natalya V. Reznichenko

  • Article
    | Open Access

    U-shaped glacial valleys dominate >10 ka since the last major glaciation and the transitions from glacier-dominated to fluvial regimes are poorly understood. Here, the authors use digital topographic data to show that glacial topography is rapidly replaced by fluvial topography where rock uplift rates are high.

    • Günther Prasicek
    • , Isaac J. Larsen
    •  & David R. Montgomery

  • Article |

    Previous studies suggest that rates of gorge formation are controlled by bedrock erodibility, erosion mechanism and hillslope processes. Here, the authors show evidence of rapid gorge formation in granite bedrock and report no relationship with flood size or bedload, attributing the rate to pre-existing jointing.

    • L. Anton
    • , A. E. Mather
    •  & G. De Vicente

  • Article
    | Open Access

    The behaviour of airborne fine ash during explosive volcanic eruptions is poorly understood. Here, the authors study hail formation during an eruption, proposing a mechanism of particle aggregation that leads to the fallout of fine ash and the occurrence of concentrically layered aggregates in volcanic deposits

    • Alexa R. Van Eaton
    • , Larry G. Mastin
    •  & Amanda B. Clarke

  • Article
    | Open Access

    The rapid decay of Earth’s dipole magnetic field has recently captured the public imagination. Here, the authors present a southern hemisphere magnetic record from South African Iron Age sites using oriented samples in the floors and suggest that the anomalous field behaviour is not just a recent feature.

    • John A. Tarduno
    • , Michael K. Watkeys
    •  & Courtney L. Wagner

  • Article
    | Open Access

    Utilizing supercritical geothermal water could multiply energy production, but the abundance, location and size of such resources is unclear. Here, the authors present numerical simulations and suggest that supercritical water may play a key role in removing heat from all magmatic intrusions.

    • Samuel Scott
    • , Thomas Driesner
    •  & Philipp Weis

  • Article
    | Open Access

    Striped geochemical zonation has been observed along parts of hotspot tracks, although its origin is not well-understood. Here, the authors present Sr–Nd–Pb–Hf isotope data and present a model that can explain the evolution of zonation in both Tristan-Gough and Hawaiian hotspots, reflecting two end members.

    • Kaj Hoernle
    • , Joana Rohde
    •  & Jason P. Morgan

  • Article |

    The Earth’s mantle transition zone may play a key role in large-scale intraplate magmatism and plate tectonics. Here, the authors provide evidence for the origin of continental flood basalts in this zone, by combining oxygen isotope and geochemical evidence from the late Cenozoic Chifeng volcanics of East Asia.

    • Xuan-Ce Wang
    • , Simon A. Wilde
    •  & Ya-Nan Yang

  • Article
    | Open Access

    Following the Mw6 South Napa earthquake in California, previously dry streams and springs began to flow. Here, the authors present data from repeated stream surveys and laboratory measurements and suggest that the new flows originated from groundwater in the mountains and were released by the earthquake.

    • Chi-Yuen Wang
    •  & Michael Manga

  • Article
    | Open Access

    Recent studies suggest that the Moon is not as volatile-poor as once thought, and that volatile elements should be concentrated in crustal materials. Here, the authors present Zn isotopic and abundance data as evidence of evaporative loss of volatiles during formation of the Moon, supporting alternative models.

    • Chizu Kato
    • , Frederic Moynier
    •  & James M.D. Day

  • Article
    | Open Access

    Information regarding tectonic motion from before instrumental records can be found from palaeoshorelines and the reconstruction of sea level from observations. Here, the authors study corals uplifted by past earthquakes near the Solomon Islands and assess the Holocene deformation that took place there.

    • Kaustubh Thirumalai
    • , Frederick W. Taylor
    •  & Alison K. Papabatu

  • Article
    | Open Access

    The classic mantle plume concept explains large igneous provinces and hotspot magmatism, but often contradicts observed surface uplift and plume morphology. Here, the authors present a plume model that better supports observations by considering low-buoyancy plumes containing up to 15% of recycled oceanic crust.

    • Juliane Dannberg
    •  & Stephan V. Sobolev

  • Article
    | Open Access

    Whether exploration causes earthquakes has been a matter of recent contention particularly regarding shale gas exploration. Here, the authors use hydraulic modelling and earthquake locations to show that brine production and wastewater injection in the Azle area are likely causing earthquakes.

    • Matthew J. Hornbach
    • , Heather R. DeShon
    •  & James H. Luetgert

  • Article |

    Ocean island basalts contain primordial and recycled crustal components, sourced from the deep mantle by plumes. Here, the authors examine Hf-Nd-He isotopes in ocean floor basalts south of Samoa and suggest that selective ingress of only the primordial component from the Samoan plume can occur.

    • Oliver Nebel
    •  & Richard J. Arculus

  • Article |

    The behaviour of subducted carbonates at high pressures within the Earth is still poorly understood. Here, the authors present experimental and theoretical evidence of a new carbon–oxygen bond in a high-pressure mineral phase, which has implications for the viscosity and mobility of carbonate melts.

    • Eglantine Boulard
    • , Ding Pan
    •  & Wendy L. Mao

  • Article
    | Open Access

    The role of cohesion is vital to our understanding of how sedimentary bedforms evolve. Here, the authors show that microorganisms within the sediment affect cohesion and demonstrate that ripples can take up to one hundred times as long to develop when extracellular polymeric substances are present.

    • Jonathan Malarkey
    • , Jaco H. Baas
    •  & Peter D. Thorne

  • Article |

    Slow slip events have been observed in different subduction zones, but their relationship to megathrust earthquakes remains elusive. Here, the authors postulate that a transient event may have led to the 2011 Tohoku earthquake as the hypocentre falls within a zone of positive Coloumb stress change.

    • Yusuke Yokota
    •  & Kazuki Koketsu

  • Article |

    Understanding of the Earth’s interior requires insight into the thermal properties of silicate melts under high pressure. Here, the authors present high-pressure spectroscopic measurements of iron-enriched dense silicate glasses and infer the radiative conductivity of dense melts at the core–mantle boundary.

    • Motohiko Murakami
    • , Alexander F. Goncharov
    •  & Craig R. Bina

  • Article |

    To date, covariance of carbonate and organic carbon isotope records has been assumed to denote fidelity of the original signal. This study shows that post-depositional alteration can create strong correlations, raising doubts about the use of correlated records to imply important changes in past global carbon cycling.

    • Amanda M. Oehlert
    •  & Peter K. Swart

  • Article |

    With the exception of one occurrence, carbonatites worldwide are curiously deficient in alkalis. Here, Chen et al.present new melt inclusion data from plutonic relics in Canada that hint at a wider prevalence of alkali-enriched parental carbonatite in the geological record than previously thought.

    • Wei Chen
    • , Vadim S. Kamenetsky
    •  & Antonio Simonetti

  • Article
    | Open Access

    The mechanism by which Mars lost its early dense and carbon dioxide-rich atmosphere remains relatively unknown. Here, via mineralogical analysis of the Lafayette Martian meteorite, Tomkinson et al. infer that carbonation was an effective carbon dioxide sequestration mechanism on an early, water-rich Mars.

    • Tim Tomkinson
    • , Martin R. Lee
    •  & Caroline L. Smith

  • Article
    | Open Access

    Before the mass extinction that characterized the Late Triassic period, there were a series of biotic turnover events, the cause of which are the subject of debate. Sato et al. present geochemical evidence in support of the theory that extraterrestrial impacts had an important role in these events.

    • Honami Sato
    • , Tetsuji Onoue
    •  & Katsuhiko Suzuki

  • Article
    | Open Access

    The astronomical time scale is an essential geochronological tool, but is presently limited to the Cenozoic and Mesozoic eras. Here, Wuet al.time-calibrate Milankovitch cycles identified in strata from South China and extend this essential tool into the late Permian.

    • Huaichun Wu
    • , Shihong Zhang
    •  & Tianshui Yang

  • Article |

    In mature continental rifts, magma intrusion appears to accommodate significant crustal extension. Here, radiometric ages for lavas suggest that this style of focused magmatic accretion and rifting remained stable in the Ethiopian crust for at least ~200 kyr, prior to the onset of true oceanic spreading.

    • David J. Ferguson
    • , Andrew T. Calvert
    •  & Tim J. Wright

  • Article
    | Open Access

    Active seafloor spreading has been documented in some of the tectonically active basins of the Gulf of California. This work presents new geophysical and geochemical data as evidence that active seafloor spreading is also occurring in the northernmost Wagner and Consag basins of the Gulf.

    • Rosa Ma Prol-Ledesma
    • , Marco-Antonio Torres-Vera
    •  & Carlos Robinson

  • Article |

    Changes in bubble foam structure influence magma strength. Here, Bakeret al. measure bubble size and wall thickness of basaltic foams and find that basaltic magmas are most likely to fail immediately upon vesiculation, but a permeability increase within a few seconds may reduce the risk of explosive eruptions.

    • Don R. Baker
    • , Francesco Brun
    •  & Mark Rivers

  • Article |

    Kimberlites are volatile-rich magmas that form diverging pipes containing pelletal lapilli - well rounded clasts that consist of an inner seed particle. Gernonet al. suggest that pelletal lapilli are formed when fluid volatile-rich melts intrude into earlier volcaniclastic infill close to the diatreme root zone.

    • T.M. Gernon
    • , R.J. Brown
    •  & T.K. Hincks

  • Article |

    Dolomite sedimentary rock has lateral metre-scale periodic variations in porosity and composition, which may provide information on formation and transformation. This study suggests that such variations are fossilized chemical waves emerging from stress-mediated mineral-water interaction during sediment burial diagenesis.

    • Yifeng Wang
    •  & David A. Budd

  • Article |

    The internal textures of columnar-jointed lava flows and intrusions are poorly understood. Mattssonet al. propose a melt-migration model for Icelandic basalt driven by crystallization and volume decrease inside cooling columns, which explains the macroscopic features observed in columnar-jointed basalts.

    • Hannes B. Mattsson
    • , Luca Caricchi
    •  & Ann M. Hirt

  • Article |

    Continental export of silicon to the coast is linked to ocean carbon sinks, but terrestrial silicon fluxes have not been quantified. Here, human deforestation and cultivation of the landscape are shown to be the most important factors in silicon mobilization in temperate European watersheds.

    • Eric Struyf
    • , Adriaan Smis
    •  & Patrick Meire

  • Article
    | Open Access

    The Arctic Mid-Ocean Ridge spreads extremely slowly and hydrothermal vent fields have not been reported in its vicinity. Pedersenet al. describe a black smoker vent field with large hydrothermal deposits and novel fauna distinct from those found in similar environments in the Atlantic.

    • Rolf B. Pedersen
    • , Hans Tore Rapp
    •  & Steffen L. Jorgensen

  • Article |

    Ocean tides and infragravity waves—the Earths 'hum'—have very different periods and wavelengths. Sugioka and colleagues report resonance between these two phenomena using arrays of broadband ocean-bottom seismometers and show that some tidal energy is transferred to the deep oceans through this coupling.

    • Hiroko Sugioka
    • , Yoshio Fukao
    •  & Toshihiko Kanazawa

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