Deformation condition determination and strain analysis: Application of microstructural and microthermometry study of the Zamanabad Shear Zone (East of Iran)
Microstructural analysis and microthermometry are useful methods for determining the deformation evolution. To address this issue, rheological behavior of quartz, feldspar and calcite in veins and host rocks during deformation, are presented in the mylonite zone of the dextral reverse Zamanabad Shea...
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| Veröffentlicht in: | Geotectonics 2017-05, Vol.51 (3), p.319-330 |
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| description | Microstructural analysis and microthermometry are useful methods for determining the deformation evolution. To address this issue, rheological behavior of quartz, feldspar and calcite in veins and host rocks during deformation, are presented in the mylonite zone of the dextral reverse Zamanabad Shear Zone (ZSZ), in northern part of Sistan Suture Zone (SSZ), in east of Iran. Microstructure evidences revealed two evolution stages of high and low temperature deformation. Quartz microstructures in the ZSZ show abundant evidences for early high-temperature plastic deformation (e.g. Bulging recrystallization (BLG)) which are as microstructures with SW directed ductile shearing in the central parts of the ZSZ. This shear zone shows progressively decreasing strain away from the central of shear zone toward the wall. High-temperature microstructures are overprinted partly or completely during shearing by the later low-temperature deformation (e.g. Pressure solution, fractures, veinlets). Microstructural observations of veins (quartz and calcite) confirms the results of microstructures in the host rock, as quartz veins occurred from peak metamorphic conditions ( |
| doi_str_mv | 10.1134/S0016852117030025 |
| format | Article |
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P–T
conditions have been formed calcite veins (~250°C). According to microthermometric studies, two primary fluid groups are observed in quartz veins: (1) fluids trapped during peak deformation conditions, with higher-salinity, They were initially trapped at ~300–400°C, (2) smaller fluids by trapping of low-salinity inclusions at ~240–180°C that related to subsequent phases of shear zone exhumation in lower deep. Microthermometry results and microstructural analysis indicate deformation under lower greenschist facies conditions for the ZSZ, and then exhumation of the early of high-temperature rocks within regime of ductile-brittle transition to brittle.</description><identifier>ISSN: 0016-8521</identifier><identifier>EISSN: 1556-1976</identifier><identifier>DOI: 10.1134/S0016852117030025</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Brittleness ; Calcite ; Deformation ; Ductile-brittle transition ; Earth and Environmental Science ; Earth Sciences ; Evolution ; Feldspars ; Fluids ; Fracture mechanics ; Fractures ; Greenschist facies ; High temperature ; Inclusions ; Low temperature ; Methods ; Microstructural analysis ; Microstructure ; Phases ; Plastic deformation ; Plastics ; Pressure ; Quartz ; Recrystallization ; Rheological properties ; Rock ; Rocks ; Salinity ; Salinity effects ; Shear ; Shear zone ; Shearing ; Strain ; Structural Geology ; Temperature effects ; Trapping ; Veins (geology)</subject><ispartof>Geotectonics, 2017-05, Vol.51 (3), p.319-330</ispartof><rights>Pleiades Publishing, Inc. 2017</rights><rights>Geotectonics is a copyright of Springer, 2017.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-a291t-e95e1b2a7c94c0d5932e6b5ed36ea8196b8c75f5406c21851603da9bd6f75ec3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S0016852117030025$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S0016852117030025$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27923,27924,41487,42556,51318</link.rule.ids></links><search><creatorcontrib>Abbasi, S.</creatorcontrib><creatorcontrib>Heyhat, M. R.</creatorcontrib><creatorcontrib>Gholami, E.</creatorcontrib><creatorcontrib>Zarrinkoub, M. H.</creatorcontrib><title>Deformation condition determination and strain analysis: Application of microstructural and microthermometry study of the Zamanabad Shear Zone (East of Iran)</title><title>Geotectonics</title><addtitle>Geotecton</addtitle><description>Microstructural analysis and microthermometry are useful methods for determining the deformation evolution. To address this issue, rheological behavior of quartz, feldspar and calcite in veins and host rocks during deformation, are presented in the mylonite zone of the dextral reverse Zamanabad Shear Zone (ZSZ), in northern part of Sistan Suture Zone (SSZ), in east of Iran. Microstructure evidences revealed two evolution stages of high and low temperature deformation. Quartz microstructures in the ZSZ show abundant evidences for early high-temperature plastic deformation (e.g. Bulging recrystallization (BLG)) which are as microstructures with SW directed ductile shearing in the central parts of the ZSZ. This shear zone shows progressively decreasing strain away from the central of shear zone toward the wall. High-temperature microstructures are overprinted partly or completely during shearing by the later low-temperature deformation (e.g. Pressure solution, fractures, veinlets). Microstructural observations of veins (quartz and calcite) confirms the results of microstructures in the host rock, as quartz veins occurred from peak metamorphic conditions (<400°C) and then in lower
P–T
conditions have been formed calcite veins (~250°C). According to microthermometric studies, two primary fluid groups are observed in quartz veins: (1) fluids trapped during peak deformation conditions, with higher-salinity, They were initially trapped at ~300–400°C, (2) smaller fluids by trapping of low-salinity inclusions at ~240–180°C that related to subsequent phases of shear zone exhumation in lower deep. Microthermometry results and microstructural analysis indicate deformation under lower greenschist facies conditions for the ZSZ, and then exhumation of the early of high-temperature rocks within regime of ductile-brittle transition to brittle.</description><subject>Brittleness</subject><subject>Calcite</subject><subject>Deformation</subject><subject>Ductile-brittle transition</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Evolution</subject><subject>Feldspars</subject><subject>Fluids</subject><subject>Fracture mechanics</subject><subject>Fractures</subject><subject>Greenschist facies</subject><subject>High temperature</subject><subject>Inclusions</subject><subject>Low temperature</subject><subject>Methods</subject><subject>Microstructural analysis</subject><subject>Microstructure</subject><subject>Phases</subject><subject>Plastic deformation</subject><subject>Plastics</subject><subject>Pressure</subject><subject>Quartz</subject><subject>Recrystallization</subject><subject>Rheological properties</subject><subject>Rock</subject><subject>Rocks</subject><subject>Salinity</subject><subject>Salinity effects</subject><subject>Shear</subject><subject>Shear zone</subject><subject>Shearing</subject><subject>Strain</subject><subject>Structural Geology</subject><subject>Temperature effects</subject><subject>Trapping</subject><subject>Veins (geology)</subject><issn>0016-8521</issn><issn>1556-1976</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp1kbFOwzAURS0EEqXwAWyWWGAI2EnsxGwVFKhUiaGdukSO7VBXSRxsZ8jH8K84DQMSYnpP9557pacHwDVG9xgn6cMGIUxzEmOcoQShmJyAGSaERphl9BTMRjsa_XNw4dwBBSi4M_D1rCpjG-61aaEwrdTHTSqvbKPbSeethM5brseV14PT7hEuuq7WYgJMBRstrAlQL3xveX3MHDW_D02mUd4OoaSXw0gHEe54E9pKLuFmr7iFO9MqeLvkzo_EyvL27hKcVbx26upnzsH2Zbl9eovW76-rp8U64jHDPlKMKFzGPBMsFUgSlsSKlkTJhCqeY0bLXGSkIimiIsY5wRQlkrNS0iojSiRzcDPVdtZ89sr54mB6Gy51BWaIkZymKAkUnqjxUGdVVXRWN9wOBUbF-ITizxNCJp4yLrDth7K_mv8NfQPmLovg</recordid><startdate>20170501</startdate><enddate>20170501</enddate><creator>Abbasi, S.</creator><creator>Heyhat, M. 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H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a291t-e95e1b2a7c94c0d5932e6b5ed36ea8196b8c75f5406c21851603da9bd6f75ec3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Brittleness</topic><topic>Calcite</topic><topic>Deformation</topic><topic>Ductile-brittle transition</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Evolution</topic><topic>Feldspars</topic><topic>Fluids</topic><topic>Fracture mechanics</topic><topic>Fractures</topic><topic>Greenschist facies</topic><topic>High temperature</topic><topic>Inclusions</topic><topic>Low temperature</topic><topic>Methods</topic><topic>Microstructural analysis</topic><topic>Microstructure</topic><topic>Phases</topic><topic>Plastic deformation</topic><topic>Plastics</topic><topic>Pressure</topic><topic>Quartz</topic><topic>Recrystallization</topic><topic>Rheological properties</topic><topic>Rock</topic><topic>Rocks</topic><topic>Salinity</topic><topic>Salinity effects</topic><topic>Shear</topic><topic>Shear zone</topic><topic>Shearing</topic><topic>Strain</topic><topic>Structural Geology</topic><topic>Temperature effects</topic><topic>Trapping</topic><topic>Veins (geology)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Abbasi, S.</creatorcontrib><creatorcontrib>Heyhat, M. 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R.</au><au>Gholami, E.</au><au>Zarrinkoub, M. H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Deformation condition determination and strain analysis: Application of microstructural and microthermometry study of the Zamanabad Shear Zone (East of Iran)</atitle><jtitle>Geotectonics</jtitle><stitle>Geotecton</stitle><date>2017-05-01</date><risdate>2017</risdate><volume>51</volume><issue>3</issue><spage>319</spage><epage>330</epage><pages>319-330</pages><issn>0016-8521</issn><eissn>1556-1976</eissn><abstract>Microstructural analysis and microthermometry are useful methods for determining the deformation evolution. To address this issue, rheological behavior of quartz, feldspar and calcite in veins and host rocks during deformation, are presented in the mylonite zone of the dextral reverse Zamanabad Shear Zone (ZSZ), in northern part of Sistan Suture Zone (SSZ), in east of Iran. Microstructure evidences revealed two evolution stages of high and low temperature deformation. Quartz microstructures in the ZSZ show abundant evidences for early high-temperature plastic deformation (e.g. Bulging recrystallization (BLG)) which are as microstructures with SW directed ductile shearing in the central parts of the ZSZ. This shear zone shows progressively decreasing strain away from the central of shear zone toward the wall. High-temperature microstructures are overprinted partly or completely during shearing by the later low-temperature deformation (e.g. Pressure solution, fractures, veinlets). Microstructural observations of veins (quartz and calcite) confirms the results of microstructures in the host rock, as quartz veins occurred from peak metamorphic conditions (<400°C) and then in lower
P–T
conditions have been formed calcite veins (~250°C). According to microthermometric studies, two primary fluid groups are observed in quartz veins: (1) fluids trapped during peak deformation conditions, with higher-salinity, They were initially trapped at ~300–400°C, (2) smaller fluids by trapping of low-salinity inclusions at ~240–180°C that related to subsequent phases of shear zone exhumation in lower deep. Microthermometry results and microstructural analysis indicate deformation under lower greenschist facies conditions for the ZSZ, and then exhumation of the early of high-temperature rocks within regime of ductile-brittle transition to brittle.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S0016852117030025</doi><tpages>12</tpages></addata></record> |
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| subjects | Brittleness Calcite Deformation Ductile-brittle transition Earth and Environmental Science Earth Sciences Evolution Feldspars Fluids Fracture mechanics Fractures Greenschist facies High temperature Inclusions Low temperature Methods Microstructural analysis Microstructure Phases Plastic deformation Plastics Pressure Quartz Recrystallization Rheological properties Rock Rocks Salinity Salinity effects Shear Shear zone Shearing Strain Structural Geology Temperature effects Trapping Veins (geology) |
| title | Deformation condition determination and strain analysis: Application of microstructural and microthermometry study of the Zamanabad Shear Zone (East of Iran) |
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