Radiocarbon Dating is used on organic objects only, so the fact that your whole example is based on inorganic rocks and radio carbon dating only suggests that you do not know with any detail or understanding the topic that you are discussing.
There are 2 calories in 1 cup of Unsweetened Iced Tea. Calorie breakdown: 0% fat, 97% carbs, 3% protein.
According to the USDA Nutrient Database (where all the figures here come from), a typical 8oz. cup of brewed black tea has 2.4 calories, which is almost nothing compared to the Recommended Daily Intake(RDI) of 2000 calories for a typical adult.