The syn-orogenic sedimentary record of the Grenville Orogeny in southwest Laurentia

Jacob A. Mulder, Karl E. Karlstrom, Katherine Fletcher, Matthew T. Heizler, J. Michael Timmons, Laura J. Crossey, George E Gehrels, Mark Pecha

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Late Mesoproterozoic sedimentary sequences in southwest Laurentia range in age from 1340 to 1035 Ma and record regionally extensive intracratonic sedimentation before and during the Grenville Orogeny in southern Laurentia. This paper examines the specific links between intracratonic sedimentation and orogenesis and develops a new tectonic model for basin formation throughout southwest Laurentia during the Late Mesoproterozoic. New detrital zircon, muscovite, and biotite ages refine the provenance, depositional age, and regional correlations of Late Mesoproterozoic strata throughout southwest Laurentia. These data provide a new view of the Grenville orogen in southern Laurentia as it evolved from a continental margin arc to a continent-continent collision based on the record of inboard sedimentation. Deposition of all Late Mesoproterozoic sequences in southwest Laurentia was facilitated by far-traveled, continental-scale rivers that flowed north off the developing Grenville orogen. Sediment accumulation took place during four discrete basin forming events that can be directly linked to changes in the style of convergence and collision along the southern margin of Laurentia. The oldest basin system (lower Apache and Pahrump Groups) records distal back arc basin sedimentation at 1340–1320 Ma, synchronous with widespread magmatism along the southern margin of Laurentia. Unconformably overlying shallow marine carbonate-bearing sequences (lower Unkar Group and correlatives) were deposited between 1255 and 1230 Ma in a regionally extensive retroarc basin with clastic sediment sourced in part from an active continental arc along the southern margin of Laurentia. Shallow marine and terrestrial siliciclastic sequences (upper Unkar Group and correlatives) were deposited at 1140–1100 Ma and were sourced from unroofing thrust nappes in the orogen to the south in an extensive foreland basin system during continent-continent collision. Finally, coarse-grained siliciclastic deposits of the 1060–1035 Ma Hazel Formation represent a proximal foreland basin recording the final stages of the Grenville Orogeny in southern Laurentia.

Original languageEnglish (US)
Pages (from-to)33-52
Number of pages20
JournalPrecambrian Research
Volume294
DOIs
StatePublished - Jun 1 2017

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Laurentia
Sedimentation
orogeny
Sediments
Bearings (structural)
Settling tanks
Carbonates
Tectonics
Deposits
Rivers
collision
sedimentation
foreland basin
basin
siliciclastic deposit
unroofing
continental arc
clastic sediment
basin evolution
sedimentary sequence

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

Cite this

Mulder, J. A., Karlstrom, K. E., Fletcher, K., Heizler, M. T., Timmons, J. M., Crossey, L. J., ... Pecha, M. (2017). The syn-orogenic sedimentary record of the Grenville Orogeny in southwest Laurentia. Precambrian Research, 294, 33-52. https://doi.org/10.1016/j.precamres.2017.03.006

The syn-orogenic sedimentary record of the Grenville Orogeny in southwest Laurentia. / Mulder, Jacob A.; Karlstrom, Karl E.; Fletcher, Katherine; Heizler, Matthew T.; Timmons, J. Michael; Crossey, Laura J.; Gehrels, George E; Pecha, Mark.

In: Precambrian Research, Vol. 294, 01.06.2017, p. 33-52.

Research output: Contribution to journalArticle

Mulder, JA, Karlstrom, KE, Fletcher, K, Heizler, MT, Timmons, JM, Crossey, LJ, Gehrels, GE & Pecha, M 2017, 'The syn-orogenic sedimentary record of the Grenville Orogeny in southwest Laurentia', Precambrian Research, vol. 294, pp. 33-52. https://doi.org/10.1016/j.precamres.2017.03.006
Mulder JA, Karlstrom KE, Fletcher K, Heizler MT, Timmons JM, Crossey LJ et al. The syn-orogenic sedimentary record of the Grenville Orogeny in southwest Laurentia. Precambrian Research. 2017 Jun 1;294:33-52. https://doi.org/10.1016/j.precamres.2017.03.006
Mulder, Jacob A. ; Karlstrom, Karl E. ; Fletcher, Katherine ; Heizler, Matthew T. ; Timmons, J. Michael ; Crossey, Laura J. ; Gehrels, George E ; Pecha, Mark. / The syn-orogenic sedimentary record of the Grenville Orogeny in southwest Laurentia. In: Precambrian Research. 2017 ; Vol. 294. pp. 33-52.
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