How to analyze それが元で?


I understand the meaning of this phrase, but I have a hard time understanding
how it's constructed.

In phrases like それで or というわけで you have a noun plus the particle で. This looks
superficially similar, except that それが元(です) is a sentence, not a noun (or noun
phrase).

What's going on here? Is there a bunch of other stuff being left unspoken?




Might be worthwhile rendering it into partial English:

[code]

    So, with that as the 元, ...
    
[/code]

And 元 can mean foundation, start, beginning, entranceway, original,... it
could be rendered many ways.

Essentially, this construction requires that there be a preceding
sentence/clause/word to point to. (それが)

You could also see it as

[code]

    それが元となって, or それを元として, ...
    
[/code]

So you're wondering if it's related to それで or というわけで

Kind-of. というわけで is literally "by way of the [mentioned] reason" or "for that
reason" in more natural English. The で in the phrase you posted can also be
interpreted as "by way of [this] 元... (something occurred) "

Well you asked this over a month ago, but I wrote out this response so, I'll
post it in case it's useful to someone down the line.

