Evaluating thermal maturity using transmitted light techniques: Color changes in structureless organic matter and palynomorphs
Mastalerz, M., Hampton, L., and Drobniak, A., 2016, Evaluating thermal maturity using transmitted light techniques--color changes in structureless organic matter and palynomorphs: Indiana Geological Survey Occasional Paper 73, 41 p.
Progressive color changes were observed in immature to postmature shale samples from various ages (Silurian to Tertiary) and geographic locations. The thermal alteration index, assessed based on the color of structureless organic matter, along with the spore color index determined on palynomorphs, were compared with vitrinite reflectance values obtained from more than 200 samples. While some correspondence occurs, the resolution of the thermal alteration index and the spore color index is not as precise as changes in vitrinite reflectance, as was expected. The 138 photomicrographs of structureless organic matter and palynomorphs included in this paper can serve as a color reference for the various stages of maturity.
Keywords: shale, thermal maturity, photomicrographs, color, hydrocarbon, petroleum
Can't find what you're looking for? Feel free to contact us directly:Publication Sales Office
Indiana Geological Survey
611 North Walnut Grove
Bloomington, IN 47405-2208
(812) 855-7636 office phone
(812) 855-2862 office fax
IGS Return Policy
All sales are final. Materials may not be returned after they have been accepted by the customer. Any discrepencies in mail orders must be reported to IGS within 10 days of receipt of order.
The Indiana Geological Survey will refund the purchase price and sales tax of products if returned with the original sales receipt within 10 days of receipt of order. Refunds will be issued with the same method of payment as indicated on the original receipt except for cash purchases, which will be refunded by check. Items must be returned in the same condition as purchased. Refunds on digital products and services are not allowed, except for defective media such as CD-ROMs, flash drives, and so on. The customer is responsible for paying shipping costs to return items.