collected from the Cachirí area, Carboniferous Region of Tulé (Lake Maracaibo Basin,
Venezuela), associated with the Tigre Fault. Biomarkers (hopanes, steranes, n-alkanes,
acyclic isoprenoids, and aromatic steroids) were analyzed using gas chromatography-mass
spectrometry (GC-MS). These hydrocarbon rich fluids have undergone biodegradation (2–6
on the Peters and Moldowan scale), showing both the partial loss of n-alkanes and the …