adjusted exploration expenditures
(1) Adjusted exploration expenditures The term “adjusted exploration expenditures” means, with respect to any property or mine— (A) the amount of the expenditures allowed for the taxable year and all preceding taxable years as deductions under subsection (a) to the taxpayer or any other person which are properly chargeable to such property or mine and which (but for the election under subsection (a)) would be reflected in the adjusted basis of such property or mine, reduced by (B) for the taxable year and for each preceding taxable year, the amount (if any) by which (i) the amount which would have been allowable for percentage depletion under section 613 but for the deduction of such expenditures, exceeds (ii) the amount allowable for depletion under section 611, properly adjusted for any amounts included in gross income under subsection (b) or (c) and for any amounts of gain to which subsection (d) applied.