Continental-scale geographic change across Zealandia during Paleogene subduction initiation
| Type | Article | ||||||||
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| Date | 2020-05 | ||||||||
| Language | English | ||||||||
| Author(s) | Sutherland R.1, Dickens G.R.2, Blum P.3, Agnini C.4, Alegret L.5, Asatryan G.6, Bhattacharya J.2, Bordenave A.7, Chang L.8, Collot Julien7, Cramwinckel M.J.9, Dallanave E.10, Drake M.K.11, Etienne S.J.G.7, Giorgioni M.12, Gurnis M.13, Harper D.T.11, Huang H.-H.M.14, Keller A.L.15, Lam A.R.16, Li H.17, Matsui H.18, Morgans H.E.G.19, Newsam C.20, Park Y.-H.21, Pascher K.M.19, Pekar S.F.22, Penman D.E.23, Saito S.24, Stratford W.R.19, Westerhold T.25, Zhou X.26 | ||||||||
| Affiliation(s) | 1 : SGEES, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand 2 : Earth, Environmental and Planetary Sciences, Rice University, Houston, Texas 77005, USA 3 : International Ocean Discovery Program, Texas A&M University, College Station, Texas 77845-9547, USA 4 : Dipartimento di Geoscienze, Università di Padova, 35131 Padova, Italy 5 : Departamento de Ciencias de la Tierra & IUCA, Universidad de Zaragoza, 50009 Zaragoza, Spain 6 : Museum für Naturkunde, Leibniz-Institut für Evolutions und Biodiversitätsforschung, 10115 Berlin, Germany 7 : Geological Survey of New Caledonia, Noumea BP 465, New Caledonia 8 : School of Earth and Space Sciences, Peking University, Beijing, China 9 : Department of Earth Sciences, Utrecht University, 3584 CB Utrecht, The Netherlands 10 : Faculty of Geosciences, Universität Bremen, 28359 Bremen, Germany 11 : Ocean Sciences Department, University of California, Santa Cruz, California 95064, USA 12 : Instituto de Geociência, Universidade de Brasília, Brasília, Brazil 13 : Seismological Laboratory, California Institute of Technology, Pasadena, California 91125, USA 14 : Atmosphere and Ocean Research Institute, University of Tokyo, Tokyo 113-8654, Japan 15 : Department of Earth Sciences, University of California, Riverside, California 92521, USA 16 : Department of Geosciences, University of Massachusetts, Amherst, Massachusetts 01003-9297, USA 17 : Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China 18 : Department of Earth Science, Tohoku University, Sendai 980-8572, Japan 19 : GNS Science, P.O. Box 30368, Lower Hutt 5040, New Zealand 20 : Department of Earth Sciences, University College London, London WC1E 6BT, UK 21 : Department of Oceanography, Pusan National University, Busan 46421, Republic of Korea 22 : School of Earth and Environmental Sciences, Queens College (CUNY), Flushing, New York 11451, USA 23 : Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06511, USA 24 : Research and Development Center for Ocean Drilling Science, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, 236-0001, Japan 25 : Center for Marine Environmental Sciences (MARUM), University of Bremen, 28359 Bremen, Germany 26 : Institute of Marine and Coastal Sciences, Rutgers University, Rutgers, New Jersey 08854, USA |
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| Source | Geology (0091-7613) (Geological Society of America), 2020-05 , Vol. 48 , N. 5 , P. 419-424 | ||||||||
| DOI | 10.1130/g47008.1 | ||||||||
| WOS© Times Cited | 67 | ||||||||
| Abstract | Data from International Ocean Discovery Program (IODP) Expedition 371 reveal vertical movements of 1–3 km in northern Zealandia during early Cenozoic subduction initiation in the western Pacific Ocean. Lord Howe Rise rose from deep (∼1 km) water to sea level and subsided back, with peak uplift at 50 Ma in the north and between 41 and 32 Ma in the south. The New Caledonia Trough subsided 2–3 km between 55 and 45 Ma. We suggest these elevation changes resulted from crust delamination and mantle flow that led to slab formation. We propose a “subduction resurrection” model in which (1) a subduction rupture event activated lithospheric-scale faults across a broad region during less than ∼5 m.y., and (2) tectonic forces evolved over a further 4–8 m.y. as subducted slabs grew in size and drove plate-motion change. Such a subduction rupture event may have involved nucleation and lateral propagation of slip-weakening rupture along an interconnected set of preexisting weaknesses adjacent to density anomalies. |
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