FLUORESCENCE SPECTRAL-ANALYSIS OF RESINITE MACERALS FROM COALS OF THE HANNA FORMATION, WYOMING, USA

Fluoresence spectral analysis indicates that resinite marcerals from Tertiary Hanna Formation coals (Hanna Coal Field, southcentral Wyoming, USA) can be separated into five distinct groups. The first resinite group fluoresces a medium green (in blue light); its average spectral maximum occurs at or below 440 nm with a red/green quotient of 0. 22. The second resinite group fluoresces yellow-green with an average spectral maximum of 500 nm and a red/green quotient of 0. 53. The third resinite group displays a yellow fluorescence having an average spectral maximum of 580 nm and a red/green quotient of 0. 86. The fourth resinite group fluoresces orange-brown having an average spectral maximum of 610 nm and a red/green quotient of 1. 20