FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2888691911> ?p ?o ?g. }

• W2888691911 endingPage "196" @default.
• W2888691911 startingPage "174" @default.
• W2888691911 abstract "Abstract Integrated U–Pb dating and Hf-isotope analysis of zircon xenocrysts from the Baifen lamproites of the Zhenyuan area in the southeastern Guizhou Province offer a unique glimpse into the evolution of the deep continental crust beneath the southern part of the Yangtze Block, South China. A total of 148 zircons with 90–110% concordance yield U–Pb ages varying from 3458 ± 9 Ma to 252 ± 2 Ma. They generally have high Th/U ratios (>0.3), indicating a magmatic origin. The two youngest magmatic zircons give a weighted mean 206Pb/238U age of 253.0 ± 2.8 Ma, which is interpreted as the emplacement age of the host Baifen lamproites. Most zircons with pre-eruption ages are xenocrysts derived from the deeper crust of the southern Yangtze Block. They define two major Paleoproterozoic age populations at 2.17 Ga and 1.8 Ga, with similar Hf model ages (Tcrust) of 2.4–2.8 Ga (peak at 2.64 Ga). The oldest zircon has a 207Pb/206Pb age of 3458 ± 9 Ma with eHf (t) = +1.47 and Tcrust = 3.7 Ga. This demonstrates the presence of Archean crustal components (or remnants) as old as 3.7 Ga beneath the southern Yangtze Block. Magmatic events involving significant addition of juvenile mantle-derived materials mainly occurred at 2.2–2.1 Ga and 2.0–1.8 Ga, but the latter event also involved reworking of the Neoarchean crust and might represent the cratonization of the Yangtze continent during the middle Paleoproterozoic, which could be correlated to the assembly of the Columbia supercontinent. This segment of the Yangtze Block became tectonically quiescent until 1.2 Ga, implying that the crustal stabilization lasted for ca 600 million years. A few late Mesoproterozoic zircon xenocrysts within the age range 1.3–1.0 Ga suggest the occurrence of Grenville-aged events. These Neoproterozoic zircon xenocrysts (992–547 Ma) have a wide range of eHf (t) values (+8.47 to −22.07), consistent with the zircon Hf isotopic compositions of widespread coeval igneous rocks in the Yangtze Block. The data show that the Yangtze Block has undergone important crustal growth and reworking during the Neoproterozoic in response to the breakup of the Rodinia supercontinent. The early–middle Paleozoic zircon xenocrysts (513–357 Ma) have negative eHf (t) values (−2.97 to −12.69) and Tcrust Hf model ages of 1.59–2.27 Ga, indicating reworking of the Precambrian crustal basement without juvenile contributions during the Caledonian orogeny. The positive eHf (t) values (+13.79 to +0.22) of twelve late Paleozoic zircons (284–264 Ma), with a major age peak at ca 275 Ma, suggest that the Precambrian basement beneath the southern Yangtze Block experienced an episode of strong rejuvenation during the Permian. We propose a possible linkage between the Baifen lamproite magmatism (284–252 Ma) and the Emeishan flood-basalt volcanism." @default.
• W2888691911 created "2018-08-31" @default.
• W2888691911 creator A5003759585 @default.
• W2888691911 creator A5025180565 @default.
• W2888691911 creator A5036493852 @default.
• W2888691911 creator A5039903454 @default.
• W2888691911 creator A5040292900 @default.
• W2888691911 creator A5056410545 @default.
• W2888691911 creator A5071836032 @default.
• W2888691911 creator A5079202638 @default.
• W2888691911 date "2018-10-01" @default.
• W2888691911 modified "2023-10-15" @default.
• W2888691911 title "Unexposed Archean components and complex post-Archean accretion/reworking processes beneath the southern Yangtze Block revealed by zircon xenocrysts from the Paleozoic lamproites, South China" @default.
• W2888691911 cites W1120155448 @default.
• W2888691911 cites W1127533065 @default.
• W2888691911 cites W1197883656 @default.
• W2888691911 cites W1475468184 @default.
• W2888691911 cites W1533128066 @default.
• W2888691911 cites W1963715522 @default.
• W2888691911 cites W1964116700 @default.
• W2888691911 cites W1964957427 @default.
• W2888691911 cites W1965270901 @default.
• W2888691911 cites W1965829694 @default.
• W2888691911 cites W1965958159 @default.
• W2888691911 cites W1966495508 @default.
• W2888691911 cites W1966642168 @default.
• W2888691911 cites W1967541673 @default.
• W2888691911 cites W1967787353 @default.
• W2888691911 cites W1967891107 @default.
• W2888691911 cites W1970038120 @default.
• W2888691911 cites W1970054777 @default.
• W2888691911 cites W1970551674 @default.
• W2888691911 cites W1973480449 @default.
• W2888691911 cites W1975676133 @default.
• W2888691911 cites W1975837076 @default.
• W2888691911 cites W1975900323 @default.
• W2888691911 cites W1975965411 @default.
• W2888691911 cites W1977883237 @default.
• W2888691911 cites W1978362794 @default.
• W2888691911 cites W1979854640 @default.
• W2888691911 cites W1980244506 @default.
• W2888691911 cites W1980463640 @default.
• W2888691911 cites W1981207838 @default.
• W2888691911 cites W1981316911 @default.
• W2888691911 cites W1981687636 @default.
• W2888691911 cites W1982272146 @default.
• W2888691911 cites W1985560495 @default.
• W2888691911 cites W1985661185 @default.
• W2888691911 cites W1985794693 @default.
• W2888691911 cites W1986791803 @default.
• W2888691911 cites W1986925480 @default.
• W2888691911 cites W1987084495 @default.
• W2888691911 cites W1988954106 @default.
• W2888691911 cites W1989471247 @default.
• W2888691911 cites W1990277683 @default.
• W2888691911 cites W1991381283 @default.
• W2888691911 cites W1992326732 @default.
• W2888691911 cites W1992397022 @default.
• W2888691911 cites W1993407228 @default.
• W2888691911 cites W1995269464 @default.
• W2888691911 cites W1995382732 @default.
• W2888691911 cites W1996090141 @default.
• W2888691911 cites W1996333061 @default.
• W2888691911 cites W1996489529 @default.
• W2888691911 cites W1997606350 @default.
• W2888691911 cites W1998080044 @default.
• W2888691911 cites W1998535170 @default.
• W2888691911 cites W1999351938 @default.
• W2888691911 cites W2000253240 @default.
• W2888691911 cites W2000555536 @default.
• W2888691911 cites W2003311821 @default.
• W2888691911 cites W2009194020 @default.
• W2888691911 cites W2010272286 @default.
• W2888691911 cites W2011736759 @default.
• W2888691911 cites W2012243673 @default.
• W2888691911 cites W2012553199 @default.
• W2888691911 cites W2013649653 @default.
• W2888691911 cites W2014187062 @default.
• W2888691911 cites W2014580760 @default.
• W2888691911 cites W2016653852 @default.
• W2888691911 cites W2017024871 @default.
• W2888691911 cites W2017280725 @default.
• W2888691911 cites W2017722262 @default.
• W2888691911 cites W2018441032 @default.
• W2888691911 cites W2018641192 @default.
• W2888691911 cites W2019143131 @default.
• W2888691911 cites W2020973699 @default.
• W2888691911 cites W2022686335 @default.
• W2888691911 cites W2022859730 @default.
• W2888691911 cites W2024337096 @default.
• W2888691911 cites W2026287564 @default.
• W2888691911 cites W2028071342 @default.
• W2888691911 cites W2028573058 @default.
• W2888691911 cites W2029184354 @default.
• W2888691911 cites W2029349252 @default.
• W2888691911 cites W2031621767 @default.
• W2888691911 cites W2031947788 @default.
• W2888691911 cites W2034383015 @default.

• next