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Exploration and Evaluation | 6 Months Ended
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Jun. 30, 2024
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Exploration and evaluation | B.1 Exploration and evaluation
|  | Asia Pacific US$m |  |  | Americas US$m |  |  | Africa US$m |  |  | Total US$m |
Half-year ended 30 June 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying amount at 1 January 2024 |  |  | 568 |  |  |  | 76 |  |  |  | 24 |  |  |  | 668 |
Additions |  |  | 11 |  |  |  | 52 |  |  |  | 14 |  |  |  | 77 |
Amortisation of licence acquisition costs |  |  | — |  |  |  | (5 | ) |  |  | — |  |  |  | (5 | )
Transferred exploration and evaluation |  |  | (8 | ) |  |  | — |  |  |  | (18 | ) |  |  | (26 | )
Carrying amount at 30 June 2024 |  |  | 571 |  |  |  | 123 |  |  |  | 20 |  |  |  | 714 |
Year ended 31 December 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying amount at 1 January 2023 |  |  | 529 |  |  |  | 240 |  |  |  | 38 |  |  |  | 807 |
Additions |  |  | 79 |  |  |  | 161 |  |  |  | 6 |  |  |  | 246 |
Amortisation of licence acquisition costs |  |  | — |  |  |  | (2 | ) |  |  | (2 | ) |  |  | (4 | )
Expensed |  |  | (31 | ) |  |  | (28 | ) |  |  | (18 | ) |  |  | (77 | )
Transferred exploration and evaluation 1 |  |  | (9 | ) |  |  | (295 | ) |  |  | — |  |  |  | (304 | )
Carrying amount at 31 December 2023 |  |  | 568 |  |  |  | 76 |  |  |  | 24 |  |  |  | 668 |
1. | On 20 June 2023, the Group made a final investment decision to develop the Trion resource in Mexico. Related exploration and evaluation assets of $274 million were transferred to oil and gas properties.

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- Definition The entire disclosure for exploration and evaluation assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2023-01-01 -Section Disclosure -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2023-en-r&doctype=Standard&dita_xref=IFRS06_g23-25_TI -URIDate 2023-03-23 + Details
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