<ARTICLE>                     5
<LEGEND>
This schedule  contains  summary  financial  information  from the  Consolidated
Balance  Sheet at March  31,  1998 and the  related  Statement  of  Consolidated
Operations  for the three  months  ended March 31, 1998, restated to reflect the
April 30, 1998 pooling of interests with Plutonic Resources Limited.
</LEGEND>
<RESTATED>
<MULTIPLIER>                                   1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                                DEC-31-1998      
<PERIOD-END>                                     MAR-31-1998
<CASH>                                               153,219
<SECURITIES>                                         120,288
<RECEIVABLES>                                         48,124
<ALLOWANCES>                                               0
<INVENTORY>                                           99,310
<CURRENT-ASSETS>                                     454,283
<PP&E>                                             2,380,611
<DEPRECIATION>                                     1,367,545
<TOTAL-ASSETS>                                     1,609,709
<CURRENT-LIABILITIES>                                145,537
<BONDS>                                              377,264
<PREFERRED-MANDATORY>                                      0
<PREFERRED>                                                0
<COMMON>                                             210,623
<OTHER-SE>                                           459,390
<TOTAL-LIABILITY-AND-EQUITY>                       1,609,709
<SALES>                                              200,472
<TOTAL-REVENUES>                                     216,217
<CGS>                                                171,647 <F1>
<TOTAL-COSTS>                                        184,212 <F2>
<OTHER-EXPENSES>                                      22,331 <F3>
<LOSS-PROVISION>                                           0
<INTEREST-EXPENSE>                                     5,112
<INCOME-PRETAX>                                        4,562 
<INCOME-TAX>                                           7,220 
<INCOME-CONTINUING>                                   (6,586)
<DISCONTINUED>                                             0
<EXTRAORDINARY>                                            0
<CHANGES>                                                  0
<NET-INCOME>                                          (6,586)
<EPS-PRIMARY>                                          (0.03)
<EPS-DILUTED>                                          (0.03)

<FN>
<F1> Includes  Production  costs and  Depreciation,  depletion and  amortization
     from the Statement of Consolidated Operations.
<F2> Includes  Production  costs,  Depreciation,  depletion and amortization and
     Administrative  and general  expense  from the  Statement  of  Consolidated
     Operations.
<F3> Includes  Exploration  expense,  Write-downs  and  other  unusual  charges,
     Business  combination  and  integration  costs and Other  expense  from the
     Statement of Consolidated Operations.


</FN>