On the enigmatic birth of the Pacific Plate within the Panthalassa Ocean

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Science Advances  27 Jul 2016:
Vol. 2, no. 7, e1600022
DOI: 10.1126/sciadv.1600022
  • Fig. 1 Isochrons of the Pacific Plate based on marine magnetic anomaly data, including the Japanese, Hawaiian, and Phoenix sets (5) and accretionary intra-Panthalassa subduction complexes.

    KO, Kolyma-Omolon; AK, Anadyr-Koryak; ON, Oku-Niikappu; EP, New Zealand’s Eastern Province; WR, Wrangellia; ST, Stikinia; FR, Franciscan accretionary complex; VC, Vizcaíno-Cedros region of Baja California; GU, Guerrero; SR, Santa Rosa accretionary complex.

  • Fig. 2 Relative motion diagram of the PAC-IZA-FAR-PHO plate system.

    The sense of motion of transform segments (in blue) and the orientation of ridges (in green) of the conceptual IZA-FAR, FAR-PHO, and PHO-IZA plate boundaries.

  • Fig. 3 Three-step evolution of the FAR-PHO-IZA plate system and birth of the Pacific Plate.

    (A) Pre–190 Ma. (B) Approximately 190 Ma. (C) Post–190 Ma.

  • Fig. 4 Absolute plate motion path of the Pacific Plate.

    The black line is based on the model of Wright et al. (6), incorporated in a mantle reference frame (33); the gray line is based on the fixed Pacific hotspot frame from Wessel and Kroenke (21). Red and blue background colors represent the 2480-km depth slice of the UU-P07 tomographic model.

Supplementary Materials

  • Supplementary Materials

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    • Legend for movie S1

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    Other Supplementary Material for this manuscript includes the following:

    • movie S1 (.mov format). Comparison of the UU-P07 (23), S40RTS (24), SEMUCB-WM1 (25), and TX2015 (26) tomography models for the Panthalassa region at 1500- to 2840-km depth.

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