The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern Slovenia
Fresh-water, coarse-grained and detritus-dominated Mura Formation in North Eastern Slovenia includes pyroclastic and volcaniclastic deposits originating from Upper Pliocene volcanic activity of basaltic geochemical character. Although localized in occurrence at the hamlet Grad, these pyroclastic and...
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| Format: | Article |
| Language: | English |
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Geological Survey of Slovenia
2006-12-01
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| Series: | Geologija |
| Subjects: | |
| Online Access: | http://www.geologija-revija.si/dokument.aspx?id=378 |
| _version_ | 1797945235216531456 |
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| author | Polona Kralj |
| author_facet | Polona Kralj |
| author_sort | Polona Kralj |
| collection | DOAJ |
| description | Fresh-water, coarse-grained and detritus-dominated Mura Formation in North Eastern Slovenia includes pyroclastic and volcaniclastic deposits originating from Upper Pliocene volcanic activity of basaltic geochemical character. Although localized in occurrence at the hamlet Grad, these pyroclastic and volcaniclastic sediments forma distinctive depositional unit, for which the term “Grad Member” is proposed and introduced in this paper.In the Grad area no lavas or cinder cones are preserved, and the origin of volcaniclastic fragments still uncertain. For this reason, chemical composition of basaltic rock fragments from the Grad Member volcaniclastics has been studied and compared with basaltic rocks from the neighboring locations at Klöch, Kindsberg, Dölling and Neuhaus. The Grad Member pyroclastic and volcaniclastic deposits seem to be fed from the same source which is different from the occurrences in Austria. That supports the idea about the existence of a local volcanic centre in the present Grad area. The old volcanic edificeswerepossiblydestroyed by the late-stage hydrovolcanic eruptions, and pyroclastic and volcaniclastic deposits subjected to constant reworking by fluvial currents in a dynamic sedimentary environment of alluvial fan and braided river systems. |
| first_indexed | 2024-04-10T20:53:04Z |
| format | Article |
| id | doaj.art-0c866735d3ed45d8814b920ce7cb2097 |
| institution | Directory Open Access Journal |
| issn | 0016-7789 1854-620X |
| language | English |
| last_indexed | 2024-04-10T20:53:04Z |
| publishDate | 2006-12-01 |
| publisher | Geological Survey of Slovenia |
| record_format | Article |
| series | Geologija |
| spelling | doaj.art-0c866735d3ed45d8814b920ce7cb20972023-01-23T08:10:17ZengGeological Survey of SloveniaGeologija0016-77891854-620X2006-12-01492243251The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern SloveniaPolona KraljFresh-water, coarse-grained and detritus-dominated Mura Formation in North Eastern Slovenia includes pyroclastic and volcaniclastic deposits originating from Upper Pliocene volcanic activity of basaltic geochemical character. Although localized in occurrence at the hamlet Grad, these pyroclastic and volcaniclastic sediments forma distinctive depositional unit, for which the term “Grad Member” is proposed and introduced in this paper.In the Grad area no lavas or cinder cones are preserved, and the origin of volcaniclastic fragments still uncertain. For this reason, chemical composition of basaltic rock fragments from the Grad Member volcaniclastics has been studied and compared with basaltic rocks from the neighboring locations at Klöch, Kindsberg, Dölling and Neuhaus. The Grad Member pyroclastic and volcaniclastic deposits seem to be fed from the same source which is different from the occurrences in Austria. That supports the idea about the existence of a local volcanic centre in the present Grad area. The old volcanic edificeswerepossiblydestroyed by the late-stage hydrovolcanic eruptions, and pyroclastic and volcaniclastic deposits subjected to constant reworking by fluvial currents in a dynamic sedimentary environment of alluvial fan and braided river systems.http://www.geologija-revija.si/dokument.aspx?id=378basaltic rocksvolcaniclastic sedimentsPannonian BasinMura FormationGrad Member Upper PlioceneSlovenia |
| spellingShingle | Polona Kralj The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern Slovenia Geologija basaltic rocks volcaniclastic sediments Pannonian Basin Mura Formation Grad Member Upper Pliocene Slovenia |
| title | The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern Slovenia |
| title_full | The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern Slovenia |
| title_fullStr | The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern Slovenia |
| title_full_unstemmed | The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern Slovenia |
| title_short | The origin of volcanic rock fragments in Upper Pliocene Grad Member of the Mura Formation, North-Eastern Slovenia |
| title_sort | origin of volcanic rock fragments in upper pliocene grad member of the mura formation north eastern slovenia |
| topic | basaltic rocks volcaniclastic sediments Pannonian Basin Mura Formation Grad Member Upper Pliocene Slovenia |
| url | http://www.geologija-revija.si/dokument.aspx?id=378 |
| work_keys_str_mv | AT polonakralj theoriginofvolcanicrockfragmentsinupperpliocenegradmemberofthemuraformationnortheasternslovenia AT polonakralj originofvolcanicrockfragmentsinupperpliocenegradmemberofthemuraformationnortheasternslovenia |