(Table 3) Run conditions and phase relations and proportions during cooling rate experiments on ODP Interval 163-989B-10R-7,55-59 ...

• Main Authors: Lesher, Charles E, Cashman, Katharine V, Mayfield, J D
• Format: Dataset
• Language: English
• Published: PANGAEA 1999
• Subjects: Sample code/label; Run Number; Temperature, technical; Time in minutes; Cooling rate; Mineral assemblage; Volcanic glass; Olivine; Plagioclase; Augite; Drilling/drill rig; DSDP/ODP/IODP sample designation; Experiment; Leg163; Joides Resolution; Ocean Drilling Program ODP; Greenland
• Online Access: https://dx.doi.org/10.1594/pangaea.804763; https://doi.pangaea.de/10.1594/PANGAEA.804763

Equilibrium melting and controlled cooling experiments were undertaken to constrain the crystallization and cooling histories of tholeiitic basalts recovered by the Ocean Drilling Program drilling of Site 989 on the Southeast Greenland continental margin. Isothermal experiments conducted at 1 atm. and at the fayalite-magnetite-quartz buffer using lava sample Section 163-989B-10R-7 yielded the equilibrium appearance sequence with decreasing temperature: olivine at 1184 ± 2ºC; plagioclase at 1177ºC ± 5ºC; augite at 1167 ± 5ºC; and pigeonite at 1113 ± 12ºC. In controlled cooling experiments using the same starting composition and cooling rates between 10ºC/hr and 2000ºC/hr, we find a significant temperature delay in the crystallization of olivine, plagioclase, and augite (relative to the equilibrium appearance temperature); pigeonite does not form under any dynamic crystallization conditions. Olivine exhibits the largest suppression in appearance temperature (e.g., 30º for 10ºC/hr and >190º at 100ºC/hr), ... : Data of T1 and T2 can be found in Thy et al. (1999) datasets: doi:10.1594/PANGAEA.804686 (Table 1 and Table 2). ...