Site U1546
Creators
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Teske, A.1
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Lizarralde, D.2
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Höfig, T.W.3
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Aiello, I.W.4
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Ash, J.L.5
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Bojanova, D.P.6
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Buatier, M.D.7
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Edgcomb, V.P.2
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Galerne, C.Y.8
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Gontharet, S.9
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Heuer, V.B.8
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Jiang, S.10
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Kars, M.A.C.11
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Khogenkumar Singh, S.12
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Kim, J.13
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Koornneef, L.M.T.14
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Marsaglia, K.M.15
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Meyer, N.R.16
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Morono, Y.17
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Negrete-Aranda, R.18
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Neumann, F.19
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Pastor, L.C.20
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Peña-Salinas, M.E.21
- Pérez Cruz, L.L.
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Ran, L.22
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Riboulleau, A.23
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Sarao, J.A.24
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Schubert, F.19
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Stock, J.M.25
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Toffin, L.M.A.A.20
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Xie, W.26
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Yamanaka, T.27
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Zhuang, G.
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1.
University of North Carolina at Chapel Hill
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2.
Woods Hole Oceanographic Institution
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3.
Forschungszentrum Jülich
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4.
Moss Landing Marine Laboratories
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5.
Rice University
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6.
University of Southern California
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7.
Chrono-Environment Laboratory
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8.
University of Bremen
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9.
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
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10.
Jinan University
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11.
International Ocean Discovery Program
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12.
National Institute of Oceanography
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13.
Korea Institute of Geoscience and Mineral Resources
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14.
Plymouth University
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15.
California State University, Northridge
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16.
Stanford University
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17.
Japan Agency for Marine-Earth Science and Technology
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18.
Center for Scientific Research and Higher Education at Ensenada
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19.
Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
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20.
French Research Institute for Exploitation of the Sea
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21.
Autonomous University of Baja California
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22.
Second Institute of Oceanography
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23.
Laboratoire d'Océanologie et de Géosciences
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24.
Texas A&M University
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25.
California Institute of Technology
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26.
Hohai University
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27.
Tokyo University of Marine Science and Technology
Abstract
Site U1546 is located just 1.1 km away from Site U1545 and ~51 km northwest of the axial graben of the northern Guaymas Basin spreading segment (Figures F1, F2). The primary objective was to compare these two adjacent sites that have shared sedimentation history but very different degrees of alteration resulting from intruding sills. Preexpedition seismic survey data at Site U1546 revealed a bright reflector at ~2.6 s two-way traveltime (TWT) that was interpreted to be the contact with a sill intrusion. Disruption of the sedimentary strata above the interpreted sill (~2.3–2.6 s TWT) was supposed to have formed as a response to the sill emplacement. This feature abruptly terminates laterally toward Site U1545, coincident with the termination of the underlying sill. This same sedimentary sequence appears undisrupted at Site U1545 to ~2.8 s TWT, where another sill was observed in the seismic data. The shared objective for Sites U1545 and U1546 was to compare the composition, physical properties, geochemical gradients, and microbial communities at these sites. Thus, the major objective for Site U1546 was to provide a postintrusion sedimentary succession for comparison with reference Site U1545; this comparison will provide direct measurements of changes in response to sill intrusion.
Copyright and License
Attribution 4.0 International CC BY 4.0.
Files
385_104.pdf
Additional details
Funding
- National Science Foundation
- OCE-1326927
- European Consortium for Ocean Research Drilling
- Japan Agency for Marine-Earth Science and Technology
Caltech Custom Metadata
- Caltech groups
- Division of Geological and Planetary Sciences (GPS) , Seismological Laboratory
- Publication Status
- Published