Yes! Just to pick one famous ophiolite, the peridotites of the Semail ophiolite in Oman are perhaps 300km * 50km * 5km from a quick look at some maps and cross sections [1], so 75000 km3 at 3300 kg/m3 comes out to about 2.5E17 kg or 2.5 E14 metric tons. So that's just one ophiolite and we've got a few orders of magnitude to spare.

If for any reason ophiolites weren't enough, there's places at slow-spreading ridges where it's peridotite all the way from the ocean floor to the outer core, albeit expensive to mine.

In short, we would run out of CO2 before we run out of olivine.

[1] https://doi.org/10.1144/gsjgs.151.3.0555

> I’m guestimating we have about 1/3 of that which needs to be pulled out to correct for emissions to this point.

For the moment, that’s a slight overestimate; we’re a little over 400ppm, and pre-Industrial levels were about 300ppm, so we “only” need to remove 1/4 (and we don’t really need to go back all the way to preindustrial levels, it was about 325ppm in 1970)