P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data
Among the southeast Asian countries, Indonesia, nowadays, has a biggest resources and production of copper and gold. The majority of copper and gold resources and production is derived from porphyry copper-gold deposits, such as Grasberg in Irian Jaya and Batu Hijau in Sumbawa Island. To enhance an...
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| Format: | Article |
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[Yogyakarta] : Laboratorium aekologi Fak. Biologi UGM
2006
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| _version_ | 1826031901030219776 |
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| author | Perpustakaan UGM, i-lib |
| author_facet | Perpustakaan UGM, i-lib |
| author_sort | Perpustakaan UGM, i-lib |
| collection | UGM |
| description | Among the southeast Asian countries, Indonesia, nowadays, has a biggest resources and production of copper and gold. The majority of copper and gold resources and production is derived from porphyry copper-gold deposits, such as Grasberg in Irian Jaya and Batu Hijau in Sumbawa Island. To enhance an understanding on the genesis and characteristics of the porphyry deposits, it is crucial to estimate the physicochemical conditions, including temperature, pressure (depth) and oxygen fugacity (f02) of the ore-bearing intrusions during their emplacement and crystallisation. There are many ways to estimate the physicochemical conditions, such as isotope geochemistry, microthermometric analysis of fluid inclusion and geothermobarometric analysis. In this paper, the physicochemical conditions of the causative tonalite intrusions in the Batu Hijau deposit will be constrained from the geothermobarometric data, by applying the hornblende-plagioclase and magnetite-ilmenite thermometers and the Al-in-hornblende barometer. The thermobarometers indicate that the tonalite porphyries emplace at 764 ± 22°C and 1.5 ± 0.3 kbar and completely crystallised at �540°C. If the pressure is assumed to be lithostatic, it is interpreted that the hornblende and plagioclase phenocrysts crystallised at depths of about 5.5 km. Log f02 of the magma crystallisation ranges from -20 to -12 (between NNO and HEM-MAG buffers). |
| first_indexed | 2024-03-13T18:44:58Z |
| format | Article |
| id | oai:generic.eprints.org:21611 |
| institution | Universiti Gadjah Mada |
| last_indexed | 2024-03-13T18:44:58Z |
| publishDate | 2006 |
| publisher | [Yogyakarta] : Laboratorium aekologi Fak. Biologi UGM |
| record_format | dspace |
| spelling | oai:generic.eprints.org:216112014-06-18T00:25:57Z https://repository.ugm.ac.id/21611/ P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data Perpustakaan UGM, i-lib Jurnal i-lib UGM Among the southeast Asian countries, Indonesia, nowadays, has a biggest resources and production of copper and gold. The majority of copper and gold resources and production is derived from porphyry copper-gold deposits, such as Grasberg in Irian Jaya and Batu Hijau in Sumbawa Island. To enhance an understanding on the genesis and characteristics of the porphyry deposits, it is crucial to estimate the physicochemical conditions, including temperature, pressure (depth) and oxygen fugacity (f02) of the ore-bearing intrusions during their emplacement and crystallisation. There are many ways to estimate the physicochemical conditions, such as isotope geochemistry, microthermometric analysis of fluid inclusion and geothermobarometric analysis. In this paper, the physicochemical conditions of the causative tonalite intrusions in the Batu Hijau deposit will be constrained from the geothermobarometric data, by applying the hornblende-plagioclase and magnetite-ilmenite thermometers and the Al-in-hornblende barometer. The thermobarometers indicate that the tonalite porphyries emplace at 764 ± 22°C and 1.5 ± 0.3 kbar and completely crystallised at �540°C. If the pressure is assumed to be lithostatic, it is interpreted that the hornblende and plagioclase phenocrysts crystallised at depths of about 5.5 km. Log f02 of the magma crystallisation ranges from -20 to -12 (between NNO and HEM-MAG buffers). [Yogyakarta] : Laboratorium aekologi Fak. Biologi UGM 2006 Article NonPeerReviewed Perpustakaan UGM, i-lib (2006) P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data. Jurnal i-lib UGM. http://i-lib.ugm.ac.id/jurnal/download.php?dataId=4479 |
| spellingShingle | Jurnal i-lib UGM Perpustakaan UGM, i-lib P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data |
| title | P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data |
| title_full | P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data |
| title_fullStr | P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data |
| title_full_unstemmed | P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data |
| title_short | P.T Conditions and Oxygen Fugacity of The Intrusion Emplacement at The Batu Hijau Porphyry Copper Gold Deposit, Sumbawa Island:A Constraint From Geothermobarometric Data |
| title_sort | p t conditions and oxygen fugacity of the intrusion emplacement at the batu hijau porphyry copper gold deposit sumbawa island a constraint from geothermobarometric data |
| topic | Jurnal i-lib UGM |
| work_keys_str_mv | AT perpustakaanugmilib ptconditionsandoxygenfugacityoftheintrusionemplacementatthebatuhijauporphyrycoppergolddepositsumbawaislandaconstraintfromgeothermobarometricdata |