FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2545937306> ?p ?o ?g. }

• W2545937306 endingPage "31" @default.
• W2545937306 startingPage "16" @default.
• W2545937306 abstract "Abstract The Jiamusi–Khanka Block, located in the easternmost segment of the Central Asian Orogenic Belt (CAOB), is one of the least understood blocks in northeastern China. The age of its basement, the timing of the high-grade metamorphism, and the tectonic affinity of this block have all been subjects of controversy. Here we describe newly discovered Neoproterozoic orthogneisses from the Mishan region in the central Jiamusi–Khanka Block. SIMS and LA–ICP–MS U–Pb dating of the magmatic cores of zircons from three of these high-grade orthogneisses yielded weighted mean ages that range from 898 ± 4 to 891 ± 13 Ma, indicating that early Neoproterozoic magmatism did occur in the Jiamusi–Khanka Block. Twenty-two analyses of metamorphic zircons (rims as well as some grains) gave two groups of concordant ages, one at ca. 563 Ma, interpreted as the timing of the high-grade metamorphism, and the other around 518–496 Ma, interpreted as representing a subsequent retrograde metamorphism. The orthogneisses represent metamorphosed peraluminous syn-collisional syenogranites with SiO2 = 71.29–78.08 wt%, A/CNK = 1.06–1.99, and Na2O/K2O = 0.03–1.49, and they belong chemically to the high-potassium calc-alkaline series. They have low Sr (32–134 ppm) contents and Sr/Y ratios (1.6–16.9), and display strongly fractionated to nearly flat REE patterns with negative Eu anomalies (δEu = 0.22–0.95) and depletions in Nb–Ta. These geochemical characteristics suggest that the syenogranitic rocks were derived under low pressures from a crustal source with a high proportion of sedimentary rocks, perhaps in a subduction-related setting that was undergoing transition from compression to extension. In the context of the reconstruction of Gondwana, the ca. 898–891 Ma magmatic activity and the ca. 563 Ma high-grade metamorphism in the Mishan region provide constraints on the possible linkages between the Jiamusi–Khanka Block and East Gondwana during the Neoproterozoic to early Paleozoic." @default.
• W2545937306 created "2016-11-04" @default.
• W2545937306 creator A5026090096 @default.
• W2545937306 creator A5041520847 @default.
• W2545937306 creator A5047158622 @default.
• W2545937306 creator A5070049638 @default.
• W2545937306 creator A5074346386 @default.
• W2545937306 creator A5081554342 @default.
• W2545937306 creator A5088352402 @default.
• W2545937306 date "2017-01-01" @default.
• W2545937306 modified "2023-10-18" @default.
• W2545937306 title "Zircon U–Pb ages and geochemistry of newly discovered Neoproterozoic orthogneisses in the Mishan region, NE China: Constraints on the high-grade metamorphism and tectonic affinity of the Jiamusi–Khanka Block" @default.
• W2545937306 cites W1480328088 @default.
• W2545937306 cites W1504892392 @default.
• W2545937306 cites W1514994218 @default.
• W2545937306 cites W1518712899 @default.
• W2545937306 cites W1550913970 @default.
• W2545937306 cites W1603990953 @default.
• W2545937306 cites W1815706132 @default.
• W2545937306 cites W1965917434 @default.
• W2545937306 cites W1967827341 @default.
• W2545937306 cites W1969371403 @default.
• W2545937306 cites W1970439132 @default.
• W2545937306 cites W1971685925 @default.
• W2545937306 cites W1971733245 @default.
• W2545937306 cites W1972325111 @default.
• W2545937306 cites W1973165172 @default.
• W2545937306 cites W1973675853 @default.
• W2545937306 cites W1975676133 @default.
• W2545937306 cites W1978625528 @default.
• W2545937306 cites W1979705656 @default.
• W2545937306 cites W1982527737 @default.
• W2545937306 cites W1983396787 @default.
• W2545937306 cites W1987940658 @default.
• W2545937306 cites W1988317790 @default.
• W2545937306 cites W1988557437 @default.
• W2545937306 cites W1989478869 @default.
• W2545937306 cites W1990701109 @default.
• W2545937306 cites W1995095547 @default.
• W2545937306 cites W1995881565 @default.
• W2545937306 cites W1995897602 @default.
• W2545937306 cites W1995923868 @default.
• W2545937306 cites W1997142214 @default.
• W2545937306 cites W1999253881 @default.
• W2545937306 cites W2003311821 @default.
• W2545937306 cites W2003323528 @default.
• W2545937306 cites W2004519539 @default.
• W2545937306 cites W2007105153 @default.
• W2545937306 cites W2012863359 @default.
• W2545937306 cites W2014935809 @default.
• W2545937306 cites W2016216561 @default.
• W2545937306 cites W2017279170 @default.
• W2545937306 cites W2019409833 @default.
• W2545937306 cites W2021987309 @default.
• W2545937306 cites W2022859730 @default.
• W2545937306 cites W2023621032 @default.
• W2545937306 cites W2025402991 @default.
• W2545937306 cites W2026472823 @default.
• W2545937306 cites W2033127801 @default.
• W2545937306 cites W2033885626 @default.
• W2545937306 cites W2035670944 @default.
• W2545937306 cites W2039511246 @default.
• W2545937306 cites W2040676068 @default.
• W2545937306 cites W2042266298 @default.
• W2545937306 cites W2042878180 @default.
• W2545937306 cites W2045300556 @default.
• W2545937306 cites W2048004274 @default.
• W2545937306 cites W2048808778 @default.
• W2545937306 cites W2049155381 @default.
• W2545937306 cites W2049166872 @default.
• W2545937306 cites W2053587074 @default.
• W2545937306 cites W2054366973 @default.
• W2545937306 cites W2055164627 @default.
• W2545937306 cites W2058234532 @default.
• W2545937306 cites W2060313404 @default.
• W2545937306 cites W2060866871 @default.
• W2545937306 cites W2062696197 @default.
• W2545937306 cites W2063176235 @default.
• W2545937306 cites W2063734888 @default.
• W2545937306 cites W2063976160 @default.
• W2545937306 cites W2065174458 @default.
• W2545937306 cites W2071403202 @default.
• W2545937306 cites W2072664369 @default.
• W2545937306 cites W2074343720 @default.
• W2545937306 cites W2075655861 @default.
• W2545937306 cites W2078329542 @default.
• W2545937306 cites W2080187059 @default.
• W2545937306 cites W2081246108 @default.
• W2545937306 cites W2081673195 @default.
• W2545937306 cites W2082066614 @default.
• W2545937306 cites W2084051225 @default.
• W2545937306 cites W2087611505 @default.
• W2545937306 cites W2087809268 @default.
• W2545937306 cites W2089096123 @default.
• W2545937306 cites W2089997618 @default.
• W2545937306 cites W2091071952 @default.
• W2545937306 cites W2093299383 @default.
• W2545937306 cites W2095665232 @default.

• next