Prof. Dr. Henry J.B. DICK

Prof. Dr. Henry J.B. DICK

Prof. Dr. Henry J.B. DICK

Woods Hole Oceanographic Insitution | USA

Henry Dick is a field geologist and igneous petrologist who has been working on the tectonics and petrology of the ocean crust and mantle for over 40 years. Dick is a senior scientist at the Woods Hole Oceanographic Institution where he has worked for 42 years, but has yet to decide if he will make a career there.  He obtained his PhD at Yale University with a thesis on the origin and emplacement of the Josephine Peridotite in SW Oregon. He was among the first to recognize the supra-subduction zone origin of many ophiolites, and developed a widely used approach for understanding the petrogenesis of mantle peridotites in oceanic environments.  He first established that the composition of abyssal peridotites and basalt correlate along ocean ridges, showing that the two are directly related with more refractory basalts and peridotites near mantle hotspots. Much of his recent work has focused on ridge tectonics and the architecture of the ocean crust, demonstrating the existence of a fourth class of plate boundary that exist at ultraslow spreading ridges, amagmatic accretionary segments which can take any orientation to the spreading direction where the mantle spreads directly on to the seafloor creating regions of many thousands of square kilometers where there is no crust in the ocean basins. His suggestion that such ridges represent the initiation of seafloor spreading at continental rifted margins is now being widely applied in their interpretation.  Currently he is working on the geology and geophysics of the SW Indian Ridge, showing the connections between the geology of pre-breakup Gondwana, and the composition and tectonics of the ridge.  He is a fellow of the American Geophysical Union, the Geological Society of America, and the American Association for the Advancement of Science.  He was awarded the Harry H. Hess medal of the American Geophysical Union in 2011 for outstanding contributions to Earth and planetary science.


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