Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma
Ion microprobe U–Pb isotopic data on zircons from the Paraná magmatic province are presented from one tholeiitic (high-Ti Pitanga type) and three felsic volcanic rocks from the low-Ti Palmas and high-Ti Chapecó types. Igneous zircons from the four volcanic rocks yield volcanism ages within error: i....
| Main Authors: | , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier Science BV
2011
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/37233 |
| _version_ | 1848754990263304192 |
|---|---|
| author | Pinto, V. Hartmann, L. Santos, J. McNaughton, Neal Wildner, W. |
| author_facet | Pinto, V. Hartmann, L. Santos, J. McNaughton, Neal Wildner, W. |
| author_sort | Pinto, V. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Ion microprobe U–Pb isotopic data on zircons from the Paraná magmatic province are presented from one tholeiitic (high-Ti Pitanga type) and three felsic volcanic rocks from the low-Ti Palmas and high-Ti Chapecó types. Igneous zircons from the four volcanic rocks yield volcanism ages within error: i.e. 134.4 ± 1.1 Ma (basalt), 134.6 ± 1.4 Ma (rhyodacite), 134.8 ± 1.4 (quartz latite) and 135.6 ± 1.8 Ma (quartz latite). The age of Paraná magmatism based on previous Ar–Ar geochronology has two divergent ranges: 1) 1 to 2 million years with magmatic peak at 131–133 Ma, and 2) over ~ 10 m.y. between 137 and 127 Ma. Our results show that the bimodal volcanics of the province, at least to the south of the Piquiri lineament, have very high effusion rates over a brief period with a main pulse at ~ 135 Ma, about 2% older than proposal 1, more akin to a short period of magmatism. These results are most significant for the understanding of time relations in this large intraplate magmatic province. |
| first_indexed | 2025-11-14T08:49:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-37233 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:49:11Z |
| publishDate | 2011 |
| publisher | Elsevier Science BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-372332017-09-13T16:08:46Z Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma Pinto, V. Hartmann, L. Santos, J. McNaughton, Neal Wildner, W. Paraná magmatic province Rhyodacite SHRIMP geochronology Zircon Basalt Ion microprobe U–Pb isotopic data on zircons from the Paraná magmatic province are presented from one tholeiitic (high-Ti Pitanga type) and three felsic volcanic rocks from the low-Ti Palmas and high-Ti Chapecó types. Igneous zircons from the four volcanic rocks yield volcanism ages within error: i.e. 134.4 ± 1.1 Ma (basalt), 134.6 ± 1.4 Ma (rhyodacite), 134.8 ± 1.4 (quartz latite) and 135.6 ± 1.8 Ma (quartz latite). The age of Paraná magmatism based on previous Ar–Ar geochronology has two divergent ranges: 1) 1 to 2 million years with magmatic peak at 131–133 Ma, and 2) over ~ 10 m.y. between 137 and 127 Ma. Our results show that the bimodal volcanics of the province, at least to the south of the Piquiri lineament, have very high effusion rates over a brief period with a main pulse at ~ 135 Ma, about 2% older than proposal 1, more akin to a short period of magmatism. These results are most significant for the understanding of time relations in this large intraplate magmatic province. 2011 Journal Article http://hdl.handle.net/20.500.11937/37233 10.1016/j.chemgeo.2010.11.031 Elsevier Science BV unknown |
| spellingShingle | Paraná magmatic province Rhyodacite SHRIMP geochronology Zircon Basalt Pinto, V. Hartmann, L. Santos, J. McNaughton, Neal Wildner, W. Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma |
| title | Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma |
| title_full | Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma |
| title_fullStr | Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma |
| title_full_unstemmed | Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma |
| title_short | Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma |
| title_sort | zircon u–pb geochronology from the paraná bimodal volcanic province support abrief eruptive cycle at ~135 ma |
| topic | Paraná magmatic province Rhyodacite SHRIMP geochronology Zircon Basalt |
| url | http://hdl.handle.net/20.500.11937/37233 |