Heinrich Dieter Holland
Heinrich “Dick” Holland was born in Germany, but in 1939 conditions there led him to emigrate to the United States. Here he graduated from the Stony Brook School on Long Island. Dick then attended Princeton University, where he graduated in chemistry within three years at the age of 18. He continued graduate studies at Columbia University, and at age 23 joined the faculty of Princeton University. It did not take much time for his fame to spread and he came to Harvard University in 1972, where he became the Harry C. Dudley Professor of Economic Geology. Dick Holland was one of the founding fathers of the geochemistry of hydrothermal ore deposits as he pioneered the use of thermochemical calculations to deduce the temperature and chemical composition of ore-forming fluids from observed mineral assemblages. This made it possible to obtain reliable estimates of the temperature, pressure, and fugacities of sulfur, oxygen, carbon...