Karelian shungite - an indication of 2.0-Ga-old metamorphosed oil-shale and generation of petroleum: geology, lithology and geochemistry

• Published in: Earth-Science Reviews
• Main Authors: Melezhik, V., Fallick, A., Filippov, M., Larsen, O.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 1999
• Subjects: Onega; karelia*; karelian
• Online Access: http://hdl.handle.net/21.11116/0000-0005-4CC2-B; http://hdl.handle.net/21.11116/0000-0005-4CC4-9

The ca. 2.0-Ga-old, 600-m-thick upper Zaonezhskaya Formation near Lake Onega, NW Russia, contains unusually high concentrations of C-org (up to 98%), averaging around 25%. The formation contains an estimated 25 X 10(10) tonnes of organic carbon accumulated within an area of 9000 km(2). Organic mater...