CoChat
Sign Up
Cited by 11Geological and Geochemical AnalysisGeological Studies and ExplorationPaleontology and Stratigraphy of Fossils

Geothermometry of the western half of the Central Metasedimentary Belt, Grenville Province, Ontario, and its implications

Open access
Dunn, Steven R., Markley, Michelle J., Kotikian, Maneh, Achenbach, Kay, Montanye, Bo, Peck, William H.·2019·American Mineralogist
DOI 10.2138/am-2019-6757
Open this paper in CoChat — free account

Abstract

Calcite-graphite carbon isotope thermometry results are presented for 150 new marble samples across the western Central Metasedimentary Belt (CMB) of the Ontario segment of the Grenville Province. The results show a gradual increase in peak metamorphic temperature from under 500 °C in the Tudor Township area in the east to over 700 °C along the western margin of the CMB. Modestly elevated d 13 C values above 3‰ across all terranes in the study area suggest a common temporal, and perhaps depositional origin, for the ~1.3 Ma limestone protoliths. The preserved thermal gradient is consistent with variations in marble mineralogy and character. Based on published geochronology, we argue that these temperatures correspond to peak metamorphism during the 1090–1020 Ma Ottawan orogeny, with the exception of preserved contact aureoles most notably associated with the Tudor gabbro and the Cheddar granite. The lack of significant thermal discontinuities at terrane boundaries and other shear zones, including the Bancroft shear zone and the CMB boundary zone, indicate that the entire region including the adjacent Central Gneiss Belt remained largely intact during and after the Ottawan peak metamorphic event. Variations in deformation style of pre-existing igneous complexes appear to correspond to the Ottawan thermal conditions, which include crystalline thrust sheets at high temperature, and mildly foliated domes to undeformed plutons at decreasing temperatures. In light of the peak temperatures and smooth thermal gradient we show to be superimposed on the established Grenvillian architecture, much of the western CMB should be considered part of the allochthonous medium pressure belt, and separate from the Ottawan orogenic lid that defines the eastern CMB.

Integrity signals

Registry

Crossref · 10.2138/am-2019-6757

Cites

99 of 99 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Research works printed but not linked: 13

  1. Allen, J.M. (1976) Silicate-carbonate equilibria in calcareous metasediments of the Tudor Township area, Ontario: a test of the P-T-XCO2-XH2O model of metamorphism, 227 p. Ph.D. thesis. Queen’s University, Kingston, Ontario.
  2. Burr, 1994, Structural geometry and U-Pb geochronology near Lithoprobe seismic line 32, western Central Metasedimentary Belt, Grenville Province, Ontario, Lithoprobe Abitibi-Grenville Project Report, 59
  3. Carmichael, 1978, Isograds around the Hastings metamorphic “low.”, 325
  4. Crawford, 1990, Origin of graphite in the Pickering Gneiss and the Franklin Marble, Honey Brook Upland, Pennsylvania, Geological Society of America Bulletin, 102, 807, 10.1130/0016-7606(1990)102<0807:OOGITP>2.3.CO;2 · DOI · Paper page
  5. Easton, 1992, The Grenville Province and the Proterozoic history of central and southern Ontario, 715
  6. Easton, 1991, Geology of the Mazinaw area. In Summary of Field Work and Other Activities 1991, Ontario Geological Survey, Miscellaneous Paper, 157, 95
  7. Lumbers, 1969, Geology of Limerick and Tudor Townships, Ontario Department of Mines Geological Report, 67, 110
  8. Lumbers, 1990, Nature and timing of middle Proterozoic magmatism in the Central Metasedimentary Belt, Grenville Province, Ontario, Geological Association of Canada Special Paper, 38, 243
  9. Motoyoshi, 1989, P–T evolution of the granulitefacies rocks of the Lützow-Holm Bay region, East Antarctica, 325
  10. Rivers, 2012, The Grenville Orogen—A post-LITHOPROBE perspective, 97
  11. Streepey, 1997, A compilation of thermo-barometric data from the Metasedimentary Belt of the Grenville Province, Ontario and New York state, Canadian Mineralogist, 35, 1237
  12. van der Pluijm, 1989, Extension in the Central Metsedimentary Belt of the Ontario Grenville: timing and tectonic significance, Geology, 17, 161, 10.1130/0091-7613(1989)017<0161:EITCMB>2.3.CO;2 · DOI
  13. Wynne-Edwards, 1972, The Grenville Province, 263

Cited by

Sorted by citations

Related

Authors
Dunn, S. R., Markley, M. J., Kotikian, M., Achenbach, K., Montanye, B., & Peck, W. H.
Affiliations
  • Mount Holyoke College (US)
  • University of Wyoming (US)
  • Macmillan Academy, Middlesbrough, North Yorkshire, TS5 4AG, U.K.
  • University School (US)
  • Colgate University (US)
Corresponding author
Dunn, Steven R.
ORCID
Venue
American Mineralogist
Publisher
Mineralogical Society of America
Published
2019-06-01
Volume
104
Issue
6
Pages
791-809
ISSN
  • 0003-004X (ISSN-L)
  • 1945-3027
DOI
10.2138/am-2019-6757
OpenAlex
W2948572569
Semantic Scholar
9ab69eb0f0c03812124464acfd0a4979c9ccbca8
Cited by
11
References
99
Citations by year
2026: 1 · 2024: 1 · 2023: 1 · 2022: 4 · 2021: 1 · 2020: 2 · 2019: 1
FWCI
1.35
Type
journal article
Language
en
Open access
Licence
cc-by-nc-nd
Locations
American Mineralogist (publishedVersion, cc-by-nc-nd)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
  • Physical Sciences › Earth and Planetary Sciences › Geology › Geological Studies and Exploration
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Keywords
marble, peak metamorphic temperature, Central Metasedimentary Belt, Grenville Province, Ottawan orogeny, Central Gneiss Belt, temperature gradient, Grenville orogen

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review