by rockdoc123 » Wed 19 Sep 2007, 11:37:59
$this->bbcode_second_pass_quote('', 'G')eologists are as dogmatic as the other speculative sciences. These guys refused to accept the theory of plate tectonics. Only when there was overwhelming practical evidence did they accept it. Could be the same with abiotic oil.
that is not only a strawman argument, but a pretty lame one at that. What you refer to is Alfred Weggener's hypothesis in the late 1800's regarding continental drift, which was dismissed by the Royal Society. At the time Wegener's only evidence was that there was an uncanny fit between the coast lines of South America and Africa, the Royal Society critics pointed out that the fit left a number of gaps so wasn't by any sense perfect. Of course at the time there was no way of looking at the fit of the continental shelf areas but only that of the areas above water. By the time J. Tuzo Wilson formulated his hypothesis on Plate Tectonics in the mid-seventies there was a tremendous amount of evidence in support, including relatively detailed magnetic maps of the oceanic crust, ocean bottom surveys which pointed to mid-ocean rises and transcurrent faults in linkage across large areas of the ocean and planar dipping surfaces of earthquake epicentres coincident with deepsea trenches. In short technology had come up with the appropriate overwhelming evidence in support of Wegener's original hypothesis, albeit with the enhancements proposed by Wilson which accomodated an non-expanding earth.
In the case of organic origins for oil's there is about 30-40 years worth of laboratory experimental work that has substantiated the fact that organic rich source rocks when heated produce hydrocarbons. This is a common misinformation put forth from the abiotic crowd...."no one has ever created hydrocarbons experimentally from source rock kerogens"...which is completely wrong since geochemists have been doing this through "pyrolysis" for decades. Just for fun one such experimental evidence is given in the following paper written by a
Russian scientist from the Komi Republic research centre, an academy that I have had dealings with in the past and has some pretty good scientists attached to it :
Bushnev, D.A., 2001. Pyrolysis products of kerogen from the Upper Jurassic sequence of the Sysol'sk shale-bearing region, Lithology and Mineral Resources, V. 36, No. 1-2, pp 86-91.
$this->bbcode_second_pass_quote('', 'M')ultiple alkyl derivatives of thiophene, alkyl benzenes, n-alkanes, alkenes, and isoprenoid hydrocarbons, as well as phenols, were identified in products of the pyrolysis by the chromatomass-spectrometry method.
Outside of the experimental evidence we also have the ability to use organic "fingerprints" which are the output from gas chromatography run on source rock samples or oils. By comparing various ratios of sterances, phytanes etc. from the chormatograms it is possible to trace oils with a very high degree of certainty to their source rock precursors. The presence of diamondoids, which are derived from lipids, and other organically derived elements such as oleane are also clear evidence of an organic source for oils.
Add all that to the fact that oil companies have been incredibly successful modeling the process of oil formation from organic source rocks and migration and entrapment to reservoir rocks suggests that the organic origin of oil is much beyond just being a theory.