Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica)
Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica)
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IODP 探险队 374 号地点 U1524(南极洲罗斯海)的早更新世(卡拉布里亚)火山灰的年代学和来源
DOI:
10.1029/2021gc009739
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Di Roberto A
中科院分区:
文献类型:
--
作者:
Di Roberto A
We present a full characterization of a 20 cm‐thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, in the Ross Sea, Antarctica. Tephra bedforms, mineral paragenesis, and major‐ and trace‐element composition on individual glass shards were investigated and the tephra age was constrained by40Ar‐39Ar on sanidine crystals. The40Ar‐39Ar data indicate that sanidine grains are variably contaminated by excess Ar, with the best age estimate of 1.282 ± 0.012 Ma, based on both single‐grain total fusion analyses and step‐heating experiments on multi‐grain aliquots. The tephra is characterized by a very homogeneous rhyolitic composition and a peculiar mineral assemblage, dominated by sanidine, quartz, and minor aenigmatite and arfvedsonite‐riebeckite amphiboles. The tephra from Site U1524 compositionally matches with a ca. 1.3 Ma, rhyolitic pumice fall deposit on the rim of the Chang Peak volcano summit caldera, in the Marie Byrd Land, located ca. 1,300 km from Site U1524. This contribution offers important volcanological data on the eruptive history of Chang Peak volcano and adds a new tephrochronologic marker for the dating, correlation, and synchronization of marine and continental early Pleistocene records of West Antarctica.
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DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Pietro Curzioa;Luigi Folcoa;Marinella Ada Laurenzib;M. Mellinic;Antonio Zeolia
通讯作者:
Antonio Zeolia
DOI:
--
发表时间:
2021
期刊:
Memoirs
影响因子:
--
作者:
S. Rocchi;J. Smellie
通讯作者:
J. Smellie
影响因子:
4
作者:
Di Roberto A
通讯作者:
Di Roberto A
影响因子:
5
作者:
Di Vincenzo, Gianfranco;Folco, Luigi;Harvey, Ralph P.
通讯作者:
Harvey, Ralph P.
影响因子:
64.8
作者:
Yuzhen Yan;M. Bender;E. Brook;H. Clifford;P. Kemeny;A. Kurbatov;Sean L. Mackay;P. Mayewski;J. Ng;J. Severinghaus;J. Higgins
通讯作者:
Yuzhen Yan;M. Bender;E. Brook;H. Clifford;P. Kemeny;A. Kurbatov;Sean L. Mackay;P. Mayewski;J. Ng;J. Severinghaus;J. Higgins