![]() ![]() ![]() Temperature perturbations are minimal for N v 2 the temperature profile along the vent zone axis follows the one-dimensional steady state advection profile and horizontal heat losses are negligible. It provides an easy way to estimate the thermal consequences of venting in cases where the geometry of the vent and its rate and duration of discharge can be estimated. The vent number, N v, depends on the depth extent and width of the vent zone and the rate and duration of venting and is applicable to many common geologic situations such as mud and salt diapirism and gas venting. A dimensionless vent number is derived that characterizes the axial temperature changes caused by vertical heat advection in vent zones of planar or cylindrical shape and horizontal dimensions of meters to hundreds of meters or more.
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