Energy & the Environment Certificate : Publications since January 2023

%% Klein, Emily M.   
@article{fds369968,
   Author = {Zheng, T and Lin, J and Schouten, H and Smith, DK and Klein, E and Parnell-Turner, R},
   Title = {Gravity Anomalies and Implications for Shallow Mantle
             Processes of the Western Cocos-Nazca Spreading
             Center},
   Journal = {Geophysical Research Letters},
   Volume = {50},
   Number = {5},
   Year = {2023},
   Month = {March},
   url = {http://dx.doi.org/10.1029/2022GL102133},
   Abstract = {This study analyzes up-to-date gravity data in the Galapagos
             triple junction region to understand crustal structure and
             melt distribution beneath the propagating Cocos-Nazca
             spreading center (CNSC). Application of a standard thermal
             model to the mantle Bouguer gravity anomaly (MBA) does not
             appear to result in a realistic crustal thickness in this
             region. The cross-CNSC MBA profiles flatten and axial values
             increase from east toward the western end of the CNSC. A
             simple smoothing filter applied to the standard thermal
             model with different filter widths can explain the
             progressive flattening of the MBA and is interpreted as
             different distribution widths (concentrations) of partial
             melt in the mantle. The east-west residual MBA gradient
             along the CNSC is similar to the east flank of the East
             Pacific Rise (EPR), suggesting that the along-CNSC gradient
             could partly reflect the shallow mantle properties
             associated with the EPR.},
   Doi = {10.1029/2022GL102133},
   Key = {fds369968}
}

@article{fds370427,
   Author = {Karson, JA and Chutas, LA and Hayman, NW and Hey, RN and Horst, AJ and Hurst, SD and Klein, EM and Naar, DF and Varga, RJ},
   Title = {Upper Crustal Structure of Superfast-Spread Oceanic Crust
             Exposed at the Pito Deep Rift: Implications for Seafloor
             Spreading},
   Journal = {Geochemistry, Geophysics, Geosystems},
   Volume = {24},
   Number = {3},
   Year = {2023},
   Month = {March},
   url = {http://dx.doi.org/10.1029/2022GC010527},
   Abstract = {A tectonic window into the upper 2,000 m of oceanic crust
             generated at the superfast spreading (∼142 mm/yr)
             southern East Pacific Rise exposes a continuous layered
             structure of basaltic lavas and sheeted dikes over gabbroic
             rocks. This relatively simple structure is in accord with
             expectations for crustal accretion at a very fast spreading
             rate and high magma budget where magmatic construction keeps
             pace with plate separation. Detailed observations show that
             basaltic lava flows dip progressively more steeply inward
             (toward the spreading axis where they were erupted).
             Underlying sheeted dikes are faulted and tectonically
             rotated to dip steeply outward. These structures are
             interpreted in terms of subsidence beneath the axis of the
             southern East Pacific Rise during crustal construction that
             allowed the lava unit to thicken to >400 m without creating
             comparable relief at the spreading center. Transitional
             units above and below the sheeted dike complex show that the
             thickness of upper crustal rock units is modified by
             tectonic and intrusive processes during accretion. The
             crustal structure shows that even approaching the superfast
             spreading end-member of seafloor spreading, crustal
             accretion involves dramatic tectonic processes that are not
             obvious from the surface geology of spreading
             centers.},
   Doi = {10.1029/2022GC010527},
   Key = {fds370427}
}