Abstract

Despite a large variability, a systematic pattern of heat flow is discernable from 41 new measurements between the Caribbean Sea and the mid-Atlantic ridge. The highest values are measured within 200 km of the mid-Atlantic ridge crest, and low heat flow occurs 300 to 600 km west of the ridge crest. A smaller-scale pattern is found from more detailed measurements between fracture zones between 9° and 12°N latitude. The equilibrium heat flux beneath the thickly sedimented floor of the Vema fracture is probably about twice the measured values of 3.0 HFU (μcal/cm2 sec).

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