Pre-Mississippian stratigraphy and provenance of the North Slope of Arctic Alaska II: Basinal rocks of the northeastern Brooks Range and their significance in circum-Arctic evolution

被引：6

作者：

Strauss J.V. ^{[1
]}

Johnson B.G. ^{[2
]}

Colpron M. ^{[3
]}

Nelson L.L. ^{[4
]}

Perez J.L. ^{[1
]}

Benowitz J.A. ^{[5
]}

Ward W.P. ^{[6
]}

McClelland W.C. ^{[6
]}

机构：

[1] Department of Earth Sciences, Dartmouth College, HB6105 Fairchild Hall, Hanover, 03755, NH

[2] Department of Geology and Geography, West Virginia University, 98 Beechurst Avenue, Morgantown, 26506, WV

[3] Yukon Geological Survey, PO Box 2703 (K-14), Whitehorse, Y1A 2C6, Yukon

[4] Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 N. Charles Street, Baltimore, 21218, MD

[5] Geophysical Institute, University of Alaska Fairbanks, 903 N. Koyukuk Drive, Fairbanks, 99775, AK

[6] Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, 52242, IA

来源：

Special Paper of the Geological Society of America | 2019年 / 541卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1130/2018.2541(23)

中图分类号：

学科分类号：

摘要：

The Neoproterozoic–Early Devonian(?) northeast Brooks Range basinal succession of northern Alaska and Yukon represents a peri-Laurentian deep-marine carbonate and siliciclastic succession within the composite Arctic Alaska–Chukotka microplate. The basal Firth River Group consists of a mixed siliciclastic and carbonate succession that is divided into the informal Redwacke Creek, Malcolm River, and Fish Creek formations. New U-Pb detrital zircon geochronology and δ13Ccarb and 87Sr/86Sr isotopic data from these strata, in combination with previously reported and new trace fossil discoveries, suggest the Firth River Group is Cryogenian(?)–middle(?) Cambrian in age. These strata interfinger with or are depositionally overlain by the siliciclastic-dominated lower Cambrian–Middle Ordovician(?) Neruokpuk and Leffingwell (new name) formations, which potentially record a distal expression of Cambrian extension and condensed passive margin sedimentation along the northern margin of Laurentia. All of these units are unconformably overlain by the synorogenic Clarence River Group, which is divided into the informal Aichilik and Buckland Hills formations. New U-Pb detrital zircon geochronology and previous macrofossil collections suggest the Clarence River Group is Late Ordovician–Early Devonian(?) in age. Here, we present new sedimentological observations, stratigraphic subdivisions, detrital zircon U-Pb geochronology and Lu-Hf isotope geochemistry, detrital muscovite 40Ar/39Ar geochronology, and carbonate δ13Ccarb and 87Sr/86Sr isotope geochemistry from the basinal succession that revise previous tectono-stratigraphic models for this part of Arctic Alaska and support correlations with age-equivalent strata in the Franklinian basin of the Canadian Arctic Islands and Greenland. © 2018 The Geological Society of America. All rights reserved.

引用

页码：525 / 572

页数：47

共 4 条

[1] Pre-Mississippian stratigraphy and provenance of the North Slope subterrane of Arctic Alaska I: Platformal carbonate rocks of the northeastern Brooks Range and their significance in circum-Arctic evolution
Strauss J.V.
Macdonald F.A.
McClelland W.C.
Special Paper of the Geological Society of America, 2019, 541 : 493 - 524
[2] Regional stratigraphy of the Brooks Range and North Slope, Arctic Alaska
Shell Exploration and Production Company, P.O. Box 481, Houston, TX 77001-0481, United States
Spec. Pap. Geol. Soc. Am., (1-8):
[3] Geochemical constraints on the provenance of pre-Mississippian sedimentary rocks in the North Slope subterrane of Yukon and Alaska
Nelson L.L.
Strauss J.V.
Crockford P.W.
Cox G.M.
Johnson B.G.
Ward W.
Colpron M.
McClelland W.C.
Macdonald F.A.
Special Paper of the Geological Society of America, 2019, 541 : 573 - 592
[4] Detrital geochronology of pre-Mississippian strata in the northeastern Brooks Range, Alaska: Insights into the tectonic evolution of northern Laurentia
Johnson, Benjamin G.
Strauss, Justin V.
Toro, Jaime
Benowitz, Jeff A.
Ward, William P.
Hourigan, Jeremy K.
LITHOSPHERE, 2016, 8 (06) : 649 - 667

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