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.
Hi Lucas, thanks for starting the discussion. The area surrounding the Philippine Sea plate has been and still is a very complex tectonic area from which we certainly can learn more. In terms of the link between SZI and collision, we have used several entries related to pre-existing volcanic arcs. Such arcs seem to foster SZI, much more than e.g., a passive margin, during the last 100 Ma. Following the suggestion you submitted (https://www.szidatabase.org/contribute), one additional entry that could be added to the database may be the size of the ocean basin in which SZI occurs? Hall (2019) suggests that small basins favour SZI compared to wider ones.
You additionally mention the following potential entries, which could be discussed further:
Thermal state (e.g. recent volcanism, not necessarily crustal age)
Ocean/continent topographic difference
Single-point vs. wide-trench SZI
Hall, R. (2019). The subduction initiation stage of the Wilson cycle. Geological Society, London, Special Publications, 470(1), 415–437. https://doi.org/10.1144/SP470.3