Fig. 11
From: Bubbles to Chondrites-I. Evaporation and condensation experiments, and formation of chondrules
Binary diagrams showing that a majority of real chondrules (crosses) is covered by the composition space defined by combinations of the three components, jet-dropet (in red), differential vapor (in light blue) and integrated vapor (in deep blue), that evolve by evaporation of the primordial silicates. Trajectories of chemical compositions (mol%) calculated for the three components are shown separately for five different initial CI sil compositions with different fs values, 0.01, 0.1, 0.3, 0.5 and 1. For the sake of visual clarity the parameter fs is not shown in the figures; in the two left-most figures, a smaller fs corresponds to higher concentrations in Mg, Na and Si for all three components; in the right-most figure, a smaller fs corresponds to lower Fe concentration. Open triangle in each figure connects the three components that coexist at a specified evaporation step (or VD%) for the same fs value, in order to show the composition space that can be expressed by combination of the three components. Such examples are shown: in the left, middle, and right figure, the triangle corresponds to fs & VD = 0.1 & 20.1%, 0.1 & 63.3%, and 0.5 & 63.3%, respectively. ‘Chondrules’ are compositions of real chondrules from all types of chondrites analyzed so far (see Appendix D for their data source). ’Initials’ are initial compositions, CI sil corresponding to the five selected fs values