Matches in SemOpenAlex for { <https://semopenalex.org/work/W2037541716> ?p ?o ?g. }
- W2037541716 endingPage "225" @default.
- W2037541716 startingPage "207" @default.
- W2037541716 abstract "The Makbal Complex in the western Tianshan Mountains of Kazakhstan and Kyrgyzstan consists of HP/UHP metasedimentary host rocks which enclose various HP mafic blocks or boudins. These mafic rocks comprise rare eclogites (sensu stricto and sensu lato), garnet amphibolites (retrograded eclogites) and a newly discovered glaucophanite (glaucophane–garnet–omphacite bearing rock). So far the Makbal Complex has been interpreted to predominantly consist of continental lithologies and the mafic rocks were considered as dismembered dikes intruding continental metasediments. This interpretation is mainly based on the geological relationship and bulk rock chemistry of the different rock types. It was further suggested that the continental lithologies of the Makbal Complex underwent eclogite-facies metamorphism in a former subduction zone. In the present study we combined conventional geothermometry, P–T pseudosection modeling and major and trace element whole rock geochemistry for different mafic samples (glaucophanite and eclogites (sensu lato)) in order to shed light on both the metamorphic evolution and the protoliths of the mafic HP rocks in the Makbal Complex. Prograde to peak-pressure clockwise P–T paths of glaucophanite and eclogites (sensu lato) were modeled using garnet isopleth thermobarometry. The results show that the glaucophanite and eclogite (sensu lato) samples experienced similar prograde P–T paths and slightly different peak metamorphic conditions at ~ 560 °C at 2.4 GPa for the former and between ~ 520 °C at 2.2 GPa and ~ 555 °C at ~ 2.5 GPa for the latter, corresponding to burial depths between 70 and 85 km. Whole rock major and trace element analyses and petrological evidence imply that the various rock types at the Makbal Complex most likely originated from different precursor rocks. Eclogites (sensu lato) are believed to represent strongly retrogressed former eclogite-facies rocks that had never been eclogites (sensu stricto, i.e. > 70 vol.% garnet and omphacite) due to an unfavorable alkali-poor bulk composition (Na2O < 1 wt.%). The four high-pressure mafic samples investigated in this study originated from oceanic crust (Zr/Hf ratio of 33 to 35) which contradicts all previous studies suggesting a continental protolith for all mafic HP/UHP rocks at Makbal. The present study indicates that the mafic high-pressure rocks represent incoherent segments of exhumed oceanic crust. Juxtaposition of different mafic oceanic (this study) and continental rocks is suggested to be due to buoyancy-driven exhumation of the metasedimentary host rock in the subduction channel where dismembered fragments of the subducted oceanic crust were captured in different depths." @default.
- W2037541716 created "2016-06-24" @default.
- W2037541716 creator A5053859491 @default.
- W2037541716 creator A5064629858 @default.
- W2037541716 creator A5065421233 @default.
- W2037541716 date "2013-09-01" @default.
- W2037541716 modified "2023-10-17" @default.
- W2037541716 title "High-pressure mafic oceanic rocks from the Makbal Complex, Tianshan Mountains (Kazakhstan & Kyrgyzstan): Implications for the metamorphic evolution of a fossil subduction zone" @default.
- W2037541716 cites W1482168892 @default.
- W2037541716 cites W1485237895 @default.
- W2037541716 cites W1514033991 @default.
- W2037541716 cites W1525982392 @default.
- W2037541716 cites W1530423453 @default.
- W2037541716 cites W1545192450 @default.
- W2037541716 cites W1552757520 @default.
- W2037541716 cites W1564250183 @default.
- W2037541716 cites W1667867793 @default.
- W2037541716 cites W1767843502 @default.
- W2037541716 cites W1830358639 @default.
- W2037541716 cites W1846057075 @default.
- W2037541716 cites W1966089316 @default.
- W2037541716 cites W1966258979 @default.
- W2037541716 cites W1968077829 @default.
- W2037541716 cites W1971354437 @default.
- W2037541716 cites W1972423246 @default.
- W2037541716 cites W1979214544 @default.
- W2037541716 cites W1982798861 @default.
- W2037541716 cites W1983298378 @default.
- W2037541716 cites W1987046817 @default.
- W2037541716 cites W1989192163 @default.
- W2037541716 cites W1990782149 @default.
- W2037541716 cites W1994720366 @default.
- W2037541716 cites W1999675312 @default.
- W2037541716 cites W2002242075 @default.
- W2037541716 cites W2002491258 @default.
- W2037541716 cites W2002916682 @default.
- W2037541716 cites W2007592351 @default.
- W2037541716 cites W2008743603 @default.
- W2037541716 cites W2011987758 @default.
- W2037541716 cites W2015232342 @default.
- W2037541716 cites W2019899106 @default.
- W2037541716 cites W2024436619 @default.
- W2037541716 cites W2030800261 @default.
- W2037541716 cites W2031981361 @default.
- W2037541716 cites W2035045796 @default.
- W2037541716 cites W2035542170 @default.
- W2037541716 cites W2040659934 @default.
- W2037541716 cites W2040664822 @default.
- W2037541716 cites W2042012543 @default.
- W2037541716 cites W2042947244 @default.
- W2037541716 cites W2045202047 @default.
- W2037541716 cites W2049191257 @default.
- W2037541716 cites W2051980988 @default.
- W2037541716 cites W2054133063 @default.
- W2037541716 cites W2058175402 @default.
- W2037541716 cites W2059013108 @default.
- W2037541716 cites W2059644521 @default.
- W2037541716 cites W2063693711 @default.
- W2037541716 cites W2064970650 @default.
- W2037541716 cites W2065768478 @default.
- W2037541716 cites W2074633059 @default.
- W2037541716 cites W2078120948 @default.
- W2037541716 cites W2079154644 @default.
- W2037541716 cites W2080113120 @default.
- W2037541716 cites W2080993999 @default.
- W2037541716 cites W2083871626 @default.
- W2037541716 cites W2088804581 @default.
- W2037541716 cites W2089096123 @default.
- W2037541716 cites W2089866577 @default.
- W2037541716 cites W2090531886 @default.
- W2037541716 cites W2091879906 @default.
- W2037541716 cites W2093733795 @default.
- W2037541716 cites W2096160261 @default.
- W2037541716 cites W2100411277 @default.
- W2037541716 cites W2100653978 @default.
- W2037541716 cites W2107837030 @default.
- W2037541716 cites W2118493778 @default.
- W2037541716 cites W2119438235 @default.
- W2037541716 cites W2123291756 @default.
- W2037541716 cites W2126726440 @default.
- W2037541716 cites W2127236625 @default.
- W2037541716 cites W2133610516 @default.
- W2037541716 cites W2137588825 @default.
- W2037541716 cites W2137921205 @default.
- W2037541716 cites W2138522501 @default.
- W2037541716 cites W2140454680 @default.
- W2037541716 cites W2141890535 @default.
- W2037541716 cites W2146803029 @default.
- W2037541716 cites W2148232034 @default.
- W2037541716 cites W2153647299 @default.
- W2037541716 cites W2161188118 @default.
- W2037541716 cites W2318149587 @default.
- W2037541716 cites W2354147047 @default.
- W2037541716 doi "https://doi.org/10.1016/j.lithos.2013.06.015" @default.
- W2037541716 hasPublicationYear "2013" @default.
- W2037541716 type Work @default.
- W2037541716 sameAs 2037541716 @default.
- W2037541716 citedByCount "29" @default.