Originally Posted By: Iowegian
Since Mars and Venus has about a 95% carbon dioxide atmosphere, can some tell me if that is abiotic?
The theory that coal, oil, and natural gas was created from swamps and bogs never made sense to me. The vast quantities of the stuff in such huge reservoirs could not have accumulated from bogs and thus finite.
If that is tge case than riddle me this...
Since it is estimated that nearly 1 mill barrels of oil seep, naturally, into the Gulf of Mexico each year then after a million years, how is it that there is any oil left there???
On this planet anyway, loads of carbonate containing minerals are being subducted all the time, and vulcanism is well known to emit CO2 through geologic processes, so I see no link between geologic CO2 and petroleum, personally. Is there any reason to think these minerals and processes were never present or never occur elsewhere?
I think the fact we don't see petroleum emissions near hydrothermal vents on the ocean floor is quite significant. If petroleum was created in the mantle, shouldn't we see petroleum condensing out of the emissions of such vents in the deep cold ocean heat sink?