The study of ore minerals parageneses in Ponorogo area, East Java
The present study was undertaken in the Southern Mountain Range of East Jawa, Ponorogo District. Tectonically, the region extends along the Magmatic Sunda-Banda Arc, which comprises predominantly volcanic rocks of Mandalika Formation, sedimentary rock units of Arjosari Formation, and intrusive seque...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2017-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://doi.org/10.1051/matecconf/201710104018 |
| _version_ | 1818455020576702464 |
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| author | Wiwik Dyah Hastuti Endang |
| author_facet | Wiwik Dyah Hastuti Endang |
| author_sort | Wiwik Dyah Hastuti Endang |
| collection | DOAJ |
| description | The present study was undertaken in the Southern Mountain Range of East Jawa, Ponorogo District. Tectonically, the region extends along the Magmatic Sunda-Banda Arc, which comprises predominantly volcanic rocks of Mandalika Formation, sedimentary rock units of Arjosari Formation, and intrusive sequences such as dacite, andesite and diorite. Structurally, the region is controlled by faults striking NE-SW, NW-SE and N-S. Mandalika Formation and Arjosari Formation have an interfingering relation and are Oligo-Miocene. Results of the field observation and analyses of petrography and mineragraphy on outcrops reveal that the region has commonly undergone alteration and mineralisation. The principle ore minerals occurring in the Ponorogo area are pyrite and sphalerite with abundant mineral assemblages of chalcopyrite, magnetite, hematite, galena, covelite, bornite, and limonite. Mineralisation occurs in argillic zone and subprophyllitic zone. Based on textures, structures and ore mineral assemblages, mineralisation in the study area can be devided at least into two stages. The earlier stage was present in relation to hypogene processes, and resulted in pyrite–sphalerite–chalcopyrite–magnetite– galena. The subsequent stage took place due to supergene enrichment processes, and yielded pyrite– sphalerite–covelite–bournite–limonite. Such mineral assemblages suggest that they are formed at temperatures of about 100–360° C. |
| first_indexed | 2024-12-14T22:04:08Z |
| format | Article |
| id | doaj.art-6e9bb2f460fe4ae79de9f05e35a02eac |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-14T22:04:08Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-6e9bb2f460fe4ae79de9f05e35a02eac2022-12-21T22:45:54ZengEDP SciencesMATEC Web of Conferences2261-236X2017-01-011010401810.1051/matecconf/201710104018matecconf_sicest2017_04018The study of ore minerals parageneses in Ponorogo area, East JavaWiwik Dyah Hastuti Endang0Geological Engeneering Department Faculty of Engeneering, Sriwijaya UniversityThe present study was undertaken in the Southern Mountain Range of East Jawa, Ponorogo District. Tectonically, the region extends along the Magmatic Sunda-Banda Arc, which comprises predominantly volcanic rocks of Mandalika Formation, sedimentary rock units of Arjosari Formation, and intrusive sequences such as dacite, andesite and diorite. Structurally, the region is controlled by faults striking NE-SW, NW-SE and N-S. Mandalika Formation and Arjosari Formation have an interfingering relation and are Oligo-Miocene. Results of the field observation and analyses of petrography and mineragraphy on outcrops reveal that the region has commonly undergone alteration and mineralisation. The principle ore minerals occurring in the Ponorogo area are pyrite and sphalerite with abundant mineral assemblages of chalcopyrite, magnetite, hematite, galena, covelite, bornite, and limonite. Mineralisation occurs in argillic zone and subprophyllitic zone. Based on textures, structures and ore mineral assemblages, mineralisation in the study area can be devided at least into two stages. The earlier stage was present in relation to hypogene processes, and resulted in pyrite–sphalerite–chalcopyrite–magnetite– galena. The subsequent stage took place due to supergene enrichment processes, and yielded pyrite– sphalerite–covelite–bournite–limonite. Such mineral assemblages suggest that they are formed at temperatures of about 100–360° C.https://doi.org/10.1051/matecconf/201710104018 |
| spellingShingle | Wiwik Dyah Hastuti Endang The study of ore minerals parageneses in Ponorogo area, East Java MATEC Web of Conferences |
| title | The study of ore minerals parageneses in Ponorogo area, East Java |
| title_full | The study of ore minerals parageneses in Ponorogo area, East Java |
| title_fullStr | The study of ore minerals parageneses in Ponorogo area, East Java |
| title_full_unstemmed | The study of ore minerals parageneses in Ponorogo area, East Java |
| title_short | The study of ore minerals parageneses in Ponorogo area, East Java |
| title_sort | study of ore minerals parageneses in ponorogo area east java |
| url | https://doi.org/10.1051/matecconf/201710104018 |
| work_keys_str_mv | AT wiwikdyahhastutiendang thestudyoforemineralsparagenesesinponorogoareaeastjava AT wiwikdyahhastutiendang studyoforemineralsparagenesesinponorogoareaeastjava |