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Nature of magma and ore-forming conditions at the Randu Kuning porphyry Cu-Au deposit, Indonesia: a comparative study with other Cu-Au deposits in the region.

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Title: Nature of magma and ore-forming conditions at the Randu Kuning porphyry Cu-Au deposit, Indonesia: a comparative study with other Cu-Au deposits in the region.
Authors: Idrus, Arifudin1 (AUTHOR) arifidrus@ugm.ac.id, Dana, Cendi D. P.2 (AUTHOR), Setijadji, Lucas D.1 (AUTHOR), Sutarto3 (AUTHOR), Ernowo4 (AUTHOR), Sakellaris, Grigorios A.5 (AUTHOR), van Leeuwen, Theo6 (AUTHOR)
Source: International Geology Review. Aug2024, Vol. 66 Issue 13, p2365-2383. 19p.
Subject Terms: *Metallogeny, *Hydrothermal deposits, *Ore deposits, *Porphyry, *Magmas, *Geochemistry, *Amphiboles, *Comparative studies
Geographic Terms: New Guinea (Island), Java (Indonesia)
Abstract: The subduction-related Sunda-Banda arc hosts several giant and major Cu–Au–Mo porphyry and epithermal Au systems, making it one of the most important magmatic-related metallogenic belts in Indonesia. They are accompanied by a number of smaller systems, one of which is the recently discovered Randu-Kuning porphyry Cu-Au deposit on Java Island. The present study investigates the geochemical characteristics of this deposit through whole-rock and mineral geochemistry and mineral geothermobarometry, focusing on three sequential dioritic intrusions that make up the host igneous complex, two barren and the third mineralized. Moreover, a comparative analysis is performed between other porphyry deposits in the Sunda-Banda arc and with Grasberg in Papua. This study shows that the older porphyry deposits have mostly similar geochemical characteristics to the younger deposits, suggesting the same magma source, which is mantle-derived oxidized I-type magma. Amphibole geothermobarometry shows that the formation of syn-ore intrusion in the older porphyry was higher in temperature and pressure than those at the younger porphyry. The halogen and oxygen fugacities inferred from biotite and amphibole chemistry indicate an oxidized, water- and halogen-rich melt. Our study shows that combining amphibole and biotite chemistry and whole-rock geochemical data is useful to fingerprint the magmatic-hydrothermal processes, especially where multiple magmatic phases occur. This research also provides valuable insights into the magmatic-hydrothermal physiochemical conditions during the formation of the mineralized system. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 178089619
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Nature of magma and ore-forming conditions at the Randu Kuning porphyry Cu-Au deposit, Indonesia: a comparative study with other Cu-Au deposits in the region.
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  Data: <searchLink fieldCode="AR" term="%22Idrus%2C+Arifudin%22">Idrus, Arifudin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> arifidrus@ugm.ac.id</i><br /><searchLink fieldCode="AR" term="%22Dana%2C+Cendi+D%2E+P%2E%22">Dana, Cendi D. P.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Setijadji%2C+Lucas+D%2E%22">Setijadji, Lucas D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sutarto%22">Sutarto</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ernowo%22">Ernowo</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sakellaris%2C+Grigorios+A%2E%22">Sakellaris, Grigorios A.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22van+Leeuwen%2C+Theo%22">van Leeuwen, Theo</searchLink><relatesTo>6</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Geology+Review%22">International Geology Review</searchLink>. Aug2024, Vol. 66 Issue 13, p2365-2383. 19p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Metallogeny%22">Metallogeny</searchLink><br />*<searchLink fieldCode="DE" term="%22Hydrothermal+deposits%22">Hydrothermal deposits</searchLink><br />*<searchLink fieldCode="DE" term="%22Ore+deposits%22">Ore deposits</searchLink><br />*<searchLink fieldCode="DE" term="%22Porphyry%22">Porphyry</searchLink><br />*<searchLink fieldCode="DE" term="%22Magmas%22">Magmas</searchLink><br />*<searchLink fieldCode="DE" term="%22Geochemistry%22">Geochemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Amphiboles%22">Amphiboles</searchLink><br />*<searchLink fieldCode="DE" term="%22Comparative+studies%22">Comparative studies</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
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  Data: <searchLink fieldCode="DE" term="%22New+Guinea+%28Island%29%22">New Guinea (Island)</searchLink><br /><searchLink fieldCode="DE" term="%22Java+%28Indonesia%29%22">Java (Indonesia)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The subduction-related Sunda-Banda arc hosts several giant and major Cu–Au–Mo porphyry and epithermal Au systems, making it one of the most important magmatic-related metallogenic belts in Indonesia. They are accompanied by a number of smaller systems, one of which is the recently discovered Randu-Kuning porphyry Cu-Au deposit on Java Island. The present study investigates the geochemical characteristics of this deposit through whole-rock and mineral geochemistry and mineral geothermobarometry, focusing on three sequential dioritic intrusions that make up the host igneous complex, two barren and the third mineralized. Moreover, a comparative analysis is performed between other porphyry deposits in the Sunda-Banda arc and with Grasberg in Papua. This study shows that the older porphyry deposits have mostly similar geochemical characteristics to the younger deposits, suggesting the same magma source, which is mantle-derived oxidized I-type magma. Amphibole geothermobarometry shows that the formation of syn-ore intrusion in the older porphyry was higher in temperature and pressure than those at the younger porphyry. The halogen and oxygen fugacities inferred from biotite and amphibole chemistry indicate an oxidized, water- and halogen-rich melt. Our study shows that combining amphibole and biotite chemistry and whole-rock geochemical data is useful to fingerprint the magmatic-hydrothermal processes, especially where multiple magmatic phases occur. This research also provides valuable insights into the magmatic-hydrothermal physiochemical conditions during the formation of the mineralized system. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/00206814.2023.2283739
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      – Code: eng
        Text: English
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        PageCount: 19
        StartPage: 2365
    Subjects:
      – SubjectFull: Metallogeny
        Type: general
      – SubjectFull: Hydrothermal deposits
        Type: general
      – SubjectFull: Ore deposits
        Type: general
      – SubjectFull: Porphyry
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      – SubjectFull: Magmas
        Type: general
      – SubjectFull: Geochemistry
        Type: general
      – SubjectFull: Amphiboles
        Type: general
      – SubjectFull: Comparative studies
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      – SubjectFull: New Guinea (Island)
        Type: general
      – SubjectFull: Java (Indonesia)
        Type: general
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      – TitleFull: Nature of magma and ore-forming conditions at the Randu Kuning porphyry Cu-Au deposit, Indonesia: a comparative study with other Cu-Au deposits in the region.
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              M: 08
              Text: Aug2024
              Type: published
              Y: 2024
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