I can see the parallel, but only to a certain extent. In the Genesis story it is clearly a test of faith, i.e. Abraham has to be willing to offer even his beloved son to God, although God intervenes and substitute an animal for a human sacrifice. But the fact that Abraham would have been obedient to any divine commend makes him blessed indeed:
And the angel of the LORD called unto Abraham out of heaven the second time and said, By myself have I sworn, saith the LORD, for because thou hast done this thing, and hast not withheld thy son, thine only [son]: That in blessing I will bless thee, and in multiplying I will multiply thy seed as the stars of the heaven, and as the sand which [is] upon the sea shore; and thy seed shall possess the gate of his enemies; And in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice. (Gen 22.15-18, KJV)
In The Pyre of Denethor, however, the sacrifice is an inversion of this story -- not obedience to God, but a heathen rite, not at divine command, but instigated by the impersonation of evil, not due to love for God, but caused by human madness, pride and despair.
And in Owen, the Biblical story is turned into sheer and very bitter irony, of course.