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25th International Meeting on Organic Geochemistry IMOG 2011

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P-315<br />

<strong>Organic</strong> <strong>Geochemistry</strong> of Lower Proterozoic of Kodar-Udokan<br />

trough (Aldan shield)<br />

Irina Timoshina, Elena Fursenko<br />

Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russian Federati<strong>on</strong> (corresp<strong>on</strong>ding<br />

author:TimoshinaID@ipgg.nsc.ru)<br />

Within the bounds of the Kodar-Udokan trough in<br />

the Aldan shield, the studied Lower Proterozoic (1.86<br />

Ga) organic matter (OM) c<strong>on</strong>tains Сorg 0.03-0.05%<br />

and chloroform-extractable bitumens 0.0009-<br />

0.0015%. OM is overmature, judging from the<br />

isotopically heavy carb<strong>on</strong> of the insoluble OM (δ 13 С<br />

value −29.5…−27.0‰) and low c<strong>on</strong>centrati<strong>on</strong>s of<br />

chloroform-extractable bitumens, represented by<br />

mainly resins (64.0-83.6%).<br />

Saturated fracti<strong>on</strong> of chloroform-extractable<br />

bitumens (13.7-26.9%) was analyzed with a gas<br />

chromatography / mass spectrometry method.<br />

The peaks in normal alkanes pertain to nC18-20;<br />

phytane is predominating (Pr/Ph

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