Photo credit: Pierre Martin, Ingenium | Canada Science and Technology Museum
Back in 2013, a team of scientists, led by geochemist Dr. Barbara Sherwood Lollar, discovered what could quite possibly be the oldest known groundwater yet in the Kidd Creek Mine. This Canadian Precambrian was then analyzed for its geochemical as well as radiogenic fingerprints, and determined to be around 2.6-billion-years-old.
This groundwater was trapped in thin fissures amid a granite-like rock, and scientists stated that this probably isn’t a liquid for human consumption, but for research purposes, Lollar decided to try some. Her first observation was that of saltiness, most likely caused by the reactions between the water and rock. She then described the liquid as being more viscous than tap water, and more like a very light maple syrup. It was colorless coming out of the ground, but as soon as it comes in contact with oxygen, the water turns orange because minerals in it begin to form, most notably the iron.
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This evidence led to the conclusion that the water’s mean residence time was more than a billion years – from the Precambrian era. Like ancient rocks, this water brings messages from the Earth’s early day, said the Canada Science and Technology Museum.