tag:blogger.com,1999:blog-912833525313223921.post7414112300171501034..comments2023-07-29T04:49:49.059-03:00Comments on Unconventional Geology: Isotopic Composition of Hydrocarbon GasesGeologisthttp://www.blogger.com/profile/03044199967329570135noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-912833525313223921.post-5527859560767922092014-05-06T23:22:41.707-03:002014-05-06T23:22:41.707-03:00Hello Anonymous,
Natural hydrocarbons are abiotic...Hello Anonymous, <br />Natural hydrocarbons are abiotic. Just some methane can be formed by degradation processes of organic materials by fermentation on Earth's surface. Never activity of microorganisms could form gases such as ethane, propane, ecc. This is impossible. You'll never find ethane into landfills, only methane, carbon dioxide. <br />The issue of classification of gases in thermogenic / biogenic relates to values, isotopic signatures of them. When shallower gas migration occurs on the planet, more negative values of Delta 13C PDB, this because the lighter isotope 12C has faster flow and enriched on the surface. I disagree with that classification used by the petroleum geochemists as thermogenic / biogenic. If you read the book by Thomas Gold, The Deep Hot Biosphere surely you will find the best answers to your questions. I also recommend reading the publications of studies of thermodynamics HC system published by Dr. JF Kenney. Thank you.<br />Geologisthttps://www.blogger.com/profile/03044199967329570135noreply@blogger.comtag:blogger.com,1999:blog-912833525313223921.post-21607079796226022352014-05-04T04:36:27.493-03:002014-05-04T04:36:27.493-03:00Wow, I'm a college student studying the geoche...Wow, I'm a college student studying the geochemistry of natural gas and I've never known so much evidence was available for primordial abiotic hydrocarbons until after reading this and other paper by Thomas Gold. I have 2 questions I'd appreciate if someone could answer, and forgive me if I seem ignorant: You say that because ethane and propane are present in natural gas pools but bacteria can only produce methane, and that the thermogenic idea of genesis is "dogma", which is actually the process the biogenic hypothesis uses to explain ethane/propane+ gases and not bacterial fermentation. My questions are what does the abiogenic hypothesis say about the formation of gases other than methane and what evidence for disproving thermogenic formation is there?Anonymousnoreply@blogger.com