Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: Evidence from SHRIMP U-Pb ages of detrital and plutonic zircons

Francisco Hervé, Víctor Faúndez, Manfred Brix, Mark Fanning

Resultado de la investigación: Article

13 Citas (Scopus)

Resumen

Detrital zircon populations from two sandstone samples from the lower member (Johnsons Dock Member) of the Miers Bluff Formation at Hurd Peninsula have been dated by the Sensitive High Resolution Ion Microprobe (SHRIMP) U-Pb method. In one of the samples, zircons as young as early Middle Jurassic (Bajocian) age are present. In the second sample, the youngest detrital zircons are Middle Triassic in age. The detrital zircon age spectra indicate that Permian, early Palaeozoic and Meso- to Neoproterozoic zircon bearing rocks were present in the source areas of the Miers Bluff Formation. The sedimentary rocks are intruded by the Hespérides Point Intrusive diorite stock which yielded a U-Pb zircon crystallization age of 137.7 ± 1.4 Ma (Early Cretaceous, Valanginian). These results indicate that sedimentation of the Johnsons Dock Member of the Miers Bluff Formation is bracketed in time between the Bajocian and the Valanginian. The Miers Bluff Formation has been correlated with the Trinity Peninsula Group from the Antarctic Peninsula, based on sedimentological and structural similarity. Since the Trinity Peninsula Group is older than Middle Jurassic a direct chronological correlation is not supported by our new U-Pb zircon data. However, we suggest that the tectonic setting may have migrated in time with deposition of the pre-Middle Jurassic TPG on the peninsula, to Livingston Island where the maximum age for deposition of the MBF is Bajocian (about 170 Ma).

Idioma originalEnglish
Páginas (desde-hasta)229-238
Número de páginas10
PublicaciónAntarctic Science
Volumen18
N.º2
DOI
EstadoPublished - jun 2006

Huella dactilar

ion microprobe
Antarctica
zircon
Jurassic
sedimentation
ions
Bajocian
Valanginian
sedimentary rocks
tectonics
sandstone
diorite
crystallization
sampling
tectonic setting
sedimentary rock
Permian
Triassic
Paleozoic
rocks

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Environmental Science(all)
  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Geology

Citar esto

@article{208f6751c47b427485e7aebed05c3e2e,
title = "Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: Evidence from SHRIMP U-Pb ages of detrital and plutonic zircons",
abstract = "Detrital zircon populations from two sandstone samples from the lower member (Johnsons Dock Member) of the Miers Bluff Formation at Hurd Peninsula have been dated by the Sensitive High Resolution Ion Microprobe (SHRIMP) U-Pb method. In one of the samples, zircons as young as early Middle Jurassic (Bajocian) age are present. In the second sample, the youngest detrital zircons are Middle Triassic in age. The detrital zircon age spectra indicate that Permian, early Palaeozoic and Meso- to Neoproterozoic zircon bearing rocks were present in the source areas of the Miers Bluff Formation. The sedimentary rocks are intruded by the Hesp{\'e}rides Point Intrusive diorite stock which yielded a U-Pb zircon crystallization age of 137.7 ± 1.4 Ma (Early Cretaceous, Valanginian). These results indicate that sedimentation of the Johnsons Dock Member of the Miers Bluff Formation is bracketed in time between the Bajocian and the Valanginian. The Miers Bluff Formation has been correlated with the Trinity Peninsula Group from the Antarctic Peninsula, based on sedimentological and structural similarity. Since the Trinity Peninsula Group is older than Middle Jurassic a direct chronological correlation is not supported by our new U-Pb zircon data. However, we suggest that the tectonic setting may have migrated in time with deposition of the pre-Middle Jurassic TPG on the peninsula, to Livingston Island where the maximum age for deposition of the MBF is Bajocian (about 170 Ma).",
keywords = "Detrital zircon age spectra, Early Cretaceous plutonism, Hurd Peninsula, South Shetland Islands",
author = "Francisco Herv{\'e} and V{\'i}ctor Fa{\'u}ndez and Manfred Brix and Mark Fanning",
year = "2006",
month = "6",
doi = "10.1017/S0954102006000277",
language = "English",
volume = "18",
pages = "229--238",
journal = "Antarctic Science",
issn = "0954-1020",
publisher = "Cambridge University Press",
number = "2",

}

Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica : Evidence from SHRIMP U-Pb ages of detrital and plutonic zircons. / Hervé, Francisco; Faúndez, Víctor; Brix, Manfred; Fanning, Mark.

En: Antarctic Science, Vol. 18, N.º 2, 06.2006, p. 229-238.

Resultado de la investigación: Article

TY - JOUR

T1 - Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica

T2 - Evidence from SHRIMP U-Pb ages of detrital and plutonic zircons

AU - Hervé, Francisco

AU - Faúndez, Víctor

AU - Brix, Manfred

AU - Fanning, Mark

PY - 2006/6

Y1 - 2006/6

N2 - Detrital zircon populations from two sandstone samples from the lower member (Johnsons Dock Member) of the Miers Bluff Formation at Hurd Peninsula have been dated by the Sensitive High Resolution Ion Microprobe (SHRIMP) U-Pb method. In one of the samples, zircons as young as early Middle Jurassic (Bajocian) age are present. In the second sample, the youngest detrital zircons are Middle Triassic in age. The detrital zircon age spectra indicate that Permian, early Palaeozoic and Meso- to Neoproterozoic zircon bearing rocks were present in the source areas of the Miers Bluff Formation. The sedimentary rocks are intruded by the Hespérides Point Intrusive diorite stock which yielded a U-Pb zircon crystallization age of 137.7 ± 1.4 Ma (Early Cretaceous, Valanginian). These results indicate that sedimentation of the Johnsons Dock Member of the Miers Bluff Formation is bracketed in time between the Bajocian and the Valanginian. The Miers Bluff Formation has been correlated with the Trinity Peninsula Group from the Antarctic Peninsula, based on sedimentological and structural similarity. Since the Trinity Peninsula Group is older than Middle Jurassic a direct chronological correlation is not supported by our new U-Pb zircon data. However, we suggest that the tectonic setting may have migrated in time with deposition of the pre-Middle Jurassic TPG on the peninsula, to Livingston Island where the maximum age for deposition of the MBF is Bajocian (about 170 Ma).

AB - Detrital zircon populations from two sandstone samples from the lower member (Johnsons Dock Member) of the Miers Bluff Formation at Hurd Peninsula have been dated by the Sensitive High Resolution Ion Microprobe (SHRIMP) U-Pb method. In one of the samples, zircons as young as early Middle Jurassic (Bajocian) age are present. In the second sample, the youngest detrital zircons are Middle Triassic in age. The detrital zircon age spectra indicate that Permian, early Palaeozoic and Meso- to Neoproterozoic zircon bearing rocks were present in the source areas of the Miers Bluff Formation. The sedimentary rocks are intruded by the Hespérides Point Intrusive diorite stock which yielded a U-Pb zircon crystallization age of 137.7 ± 1.4 Ma (Early Cretaceous, Valanginian). These results indicate that sedimentation of the Johnsons Dock Member of the Miers Bluff Formation is bracketed in time between the Bajocian and the Valanginian. The Miers Bluff Formation has been correlated with the Trinity Peninsula Group from the Antarctic Peninsula, based on sedimentological and structural similarity. Since the Trinity Peninsula Group is older than Middle Jurassic a direct chronological correlation is not supported by our new U-Pb zircon data. However, we suggest that the tectonic setting may have migrated in time with deposition of the pre-Middle Jurassic TPG on the peninsula, to Livingston Island where the maximum age for deposition of the MBF is Bajocian (about 170 Ma).

KW - Detrital zircon age spectra

KW - Early Cretaceous plutonism

KW - Hurd Peninsula

KW - South Shetland Islands

UR - http://www.scopus.com/inward/record.url?scp=33744956598&partnerID=8YFLogxK

U2 - 10.1017/S0954102006000277

DO - 10.1017/S0954102006000277

M3 - Article

AN - SCOPUS:33744956598

VL - 18

SP - 229

EP - 238

JO - Antarctic Science

JF - Antarctic Science

SN - 0954-1020

IS - 2

ER -