👉 The Auckland fluid, also known as the Auckland Sea Water or Auckland Submarine Trough Fluid, is a unique and dense brine solution found beneath the Auckland Basin in New Zealand's North Island. This fluid is characterized by its extremely high salinity, often exceeding 35,000 parts per thousand (ppt), making it denser than the surrounding seawater. The formation of this fluid is attributed to the evaporation of ancient seawater, which left behind a concentrated brine. This dense, saline water sinks and accumulates in the deep parts of the basin, creating a distinct layer that influences the basin's geology and marine ecosystems. The Auckland fluid plays a crucial role in shaping the underwater topography and has implications for understanding tectonic activity and sediment deposition in the region.
