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Finance income and costs | 6 Months Ended
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Jun. 30, 2023
Finance income and costs |
Finance income and costs | 8.Finance income and costs ​
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​ |  | ​ |  | Six months ended 30 June
US$ thousand | ​ | Note | ​ | 2023 |  | 2022
Finance income |  |  |  |  |  |
Income from marketable securities |  | ​ |  | 5,330 |  | 365
Foreign exchange gain |  | ​ |  | 130 |  | —
Total finance income |  | ​ |  | 5,460 |  | 365
​ | ​ | ​ | ​ | ​ | ​ | ​
Finance costs |  | ​ |  |  |  |
Interest expense under the effective interest rate method on: |  | ​ |  |  |  |
– Loans and borrowings |  | ​ |  | (2,324) |  | —
– Other financial liabilities |  | ​ |  | (7,762) |  | (9,830)
– Lease liabilities |  | ​ |  | (41) |  | —
Amortisation of discount on convertible promissory note |  | ​ |  | — |  | (8)
Total finance costs |  | ​ |  | (10,127) |  | (9,838)
​ | ​ | ​ | ​ | ​ | ​ | ​
Net change in fair value measurements of financial assets and liabilities |  |  |  |  |  |
Change in fair value of: |  |  |  |  |  |
– Warrant liability |  | 22 |  | (13,624) |  | 726
– Embedded derivative – copper and silver stream agreements |  | 22 |  | 4,789 |  | —
– Embedded derivative – mezzanine debt facility |  | 22 |  | (723) |  | —
– Embedded derivative – conversion option |  | 22 |  | — |  | 7
Total net change in fair value of financial instruments |  | ​ |  | (9,558) |  | 733
​ | ​ | ​ | ​ | ​ | ​ | ​
Net finance costs |  | ​ |  | (14,225) |  | (8,740)
​

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- Definition The disclosure of finance income (cost). [Refer: Finance income (cost)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 10 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_10_e&doctype=Standard -URIDate 2023-03-23 + Details
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- References No definition available. + Details
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