Eclogite xenoliths from Wajrakarur kimberlites, southern India
Mineralogical characteristics of eclogite xenoliths from three kimberlite pipes (KL2, P2 and P10) of the Proterozoic Wajrakarur kimberlite field of southern India have been studied. In a rare sample of enstatite eclogite from the KL2 pipe garnet contains microscopic triangular arrays of needles or b...
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SPRINGER WIEN
2006
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Online Access: | http://dspace.library.iitb.ac.in/xmlui/handle/10054/14900 https://doi.org/10.1007/s00710-006-0150-8 http://hdl.handle.net/100/1738 |
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ftiitbombay:oai:dsapce.library.iitb.ac.in:100/1738 2023-05-15T18:45:05+02:00 Eclogite xenoliths from Wajrakarur kimberlites, southern India PATEL, SC RAVI, S THAKUR, SS RAO, TK SUBBARAO, KV 2006 http://dspace.library.iitb.ac.in/xmlui/handle/10054/14900 https://doi.org/10.1007/s00710-006-0150-8 http://hdl.handle.net/100/1738 English eng SPRINGER WIEN MINERALOGY AND PETROLOGY,88,363-380 0930-0708 http://dx.doi.org/10.1007/s00710-006-0150-8 http://dspace.library.iitb.ac.in/xmlui/handle/10054/14900 http://hdl.handle.net/100/1738 7th International Eclogite Conference,Seggau, AUSTRIA,JUL 03-09, 2005 Andhra-Pradesh Anantapur District High-Pressures Upper Mantle Garnet Clinopyroxene Chemistry Yakutia Pipe Geothermobarometry Article; Proceedings Paper 2006 ftiitbombay https://doi.org/10.1007/s00710-006-0150-8 2021-06-03T17:53:03Z Mineralogical characteristics of eclogite xenoliths from three kimberlite pipes (KL2, P2 and P10) of the Proterozoic Wajrakarur kimberlite field of southern India have been studied. In a rare sample of enstatite eclogite from the KL2 pipe garnet contains microscopic triangular arrays of needles or blebs of omphacite, enstatite and rutile consistent with an origin by exsolution parallel to the isometric form {111}. Discrete omphacite grains in the sample contain exsolved needles or blebs of enstatite and garnet. Kyanite eclogites are abundant in the KL2 pipe which occasionally show a secondary ring of pure celsian around kyanite grains. Omphacite Na2O contents in the eclogites of the KL2 and P2 pipes are typically between 3 and 6 wt%, and garnet has widely variable composition with end member ranges of Prp22-81Grs0-47AImlO30Sps0-1Adr0-5Uv0-3. Eclogites of the P10 pipe comprise chromian omphacite and garnet. Phase relations in the ACF projection exhibit systematic increase of the Ca-Tschermak's component in omphacite from enstatite eclogite through biminerallic eclogite to kyanite eclogite. Garnet-clinopyroxene Fe-Mg geothermometry yields temperatures mostly in the range of 900-1100 degrees C. A formerly supersilicic nature of garnet in enstatite eclogite as inferred from exsolution mineralogy indicates minimum peak pressure of 5 GPa. Other/Unknown Material Yakutia DSpace@IIT Bombay (Indian Institute of Technology) Mineralogy and Petrology 88 1-2 363 380 |
institution |
Open Polar |
collection |
DSpace@IIT Bombay (Indian Institute of Technology) |
op_collection_id |
ftiitbombay |
language |
English |
topic |
Andhra-Pradesh Anantapur District High-Pressures Upper Mantle Garnet Clinopyroxene Chemistry Yakutia Pipe Geothermobarometry |
spellingShingle |
Andhra-Pradesh Anantapur District High-Pressures Upper Mantle Garnet Clinopyroxene Chemistry Yakutia Pipe Geothermobarometry PATEL, SC RAVI, S THAKUR, SS RAO, TK SUBBARAO, KV Eclogite xenoliths from Wajrakarur kimberlites, southern India |
topic_facet |
Andhra-Pradesh Anantapur District High-Pressures Upper Mantle Garnet Clinopyroxene Chemistry Yakutia Pipe Geothermobarometry |
description |
Mineralogical characteristics of eclogite xenoliths from three kimberlite pipes (KL2, P2 and P10) of the Proterozoic Wajrakarur kimberlite field of southern India have been studied. In a rare sample of enstatite eclogite from the KL2 pipe garnet contains microscopic triangular arrays of needles or blebs of omphacite, enstatite and rutile consistent with an origin by exsolution parallel to the isometric form {111}. Discrete omphacite grains in the sample contain exsolved needles or blebs of enstatite and garnet. Kyanite eclogites are abundant in the KL2 pipe which occasionally show a secondary ring of pure celsian around kyanite grains. Omphacite Na2O contents in the eclogites of the KL2 and P2 pipes are typically between 3 and 6 wt%, and garnet has widely variable composition with end member ranges of Prp22-81Grs0-47AImlO30Sps0-1Adr0-5Uv0-3. Eclogites of the P10 pipe comprise chromian omphacite and garnet. Phase relations in the ACF projection exhibit systematic increase of the Ca-Tschermak's component in omphacite from enstatite eclogite through biminerallic eclogite to kyanite eclogite. Garnet-clinopyroxene Fe-Mg geothermometry yields temperatures mostly in the range of 900-1100 degrees C. A formerly supersilicic nature of garnet in enstatite eclogite as inferred from exsolution mineralogy indicates minimum peak pressure of 5 GPa. |
format |
Other/Unknown Material |
author |
PATEL, SC RAVI, S THAKUR, SS RAO, TK SUBBARAO, KV |
author_facet |
PATEL, SC RAVI, S THAKUR, SS RAO, TK SUBBARAO, KV |
author_sort |
PATEL, SC |
title |
Eclogite xenoliths from Wajrakarur kimberlites, southern India |
title_short |
Eclogite xenoliths from Wajrakarur kimberlites, southern India |
title_full |
Eclogite xenoliths from Wajrakarur kimberlites, southern India |
title_fullStr |
Eclogite xenoliths from Wajrakarur kimberlites, southern India |
title_full_unstemmed |
Eclogite xenoliths from Wajrakarur kimberlites, southern India |
title_sort |
eclogite xenoliths from wajrakarur kimberlites, southern india |
publisher |
SPRINGER WIEN |
publishDate |
2006 |
url |
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14900 https://doi.org/10.1007/s00710-006-0150-8 http://hdl.handle.net/100/1738 |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
7th International Eclogite Conference,Seggau, AUSTRIA,JUL 03-09, 2005 |
op_relation |
MINERALOGY AND PETROLOGY,88,363-380 0930-0708 http://dx.doi.org/10.1007/s00710-006-0150-8 http://dspace.library.iitb.ac.in/xmlui/handle/10054/14900 http://hdl.handle.net/100/1738 |
op_doi |
https://doi.org/10.1007/s00710-006-0150-8 |
container_title |
Mineralogy and Petrology |
container_volume |
88 |
container_issue |
1-2 |
container_start_page |
363 |
op_container_end_page |
380 |
_version_ |
1766236030061510656 |