SZI Forum

Hello everyone, First of all, thank you for this initiative and for setting up this platform. I would like to start a discussion on the links between SZI and collision, and eventually on the (indirect?) evidences that can build that link. In particular on the South China Sea / Philippine Sea plate and surrounding plate boundaries. I am myself working in the Taiwan/Philippine/Ryukyu areas mostly on tectonic problems primarily based on field geology and geochronology, and would like to compile, share and discuss some of the evidences found on those areas. I am still exploring the database to see the best way to contribute to avoid redundancies.

For most SZI events in the SZI Database 1.0, a nearby subduction zone is common, while a nearby passive margin is not. ➥ Is dynamic (tectonic & mantle) forcing more important to start a new subduction zone than a major structural heterogeneity in the plate system?

We currently cover 13 events that occurred since around 105 Ma: Lesser Antilles (Atlantic; 49±10 Ma) Cascadia (East Pacific; 48 ± 5 Ma) Sunda-Java (Indian Ocean; 50 ± 10 Ma) Aleutian (North Pacific; 53 ± 2 Ma) South Sandwich (South Atlantic; 34 ± 5 Ma) Ryukyu (West Pacific; 6 ± 1 Ma) Philippine (West Pacific; 93 Ma) New Hebrides-New Britain (West Pacific; 10 ± 2 Ma) Halmahera ( /East Molucca ; West Pacific; 15 ± 4 Ma) Tonga-Kermadec (West Pacific; 50 ± 5 Ma) Izu-Bonin-Mariana (West Pacific; 52 ± 0.5 Ma) Anatolia (Western Neotethys; 104 ± 1 Ma) Oman (Western Neotethys; 104 ± 1 Ma) Any SZI event you would like to see added?