EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Upper-crustal, basement-involved folding in the East Range of the Sudbury Basin, Ontario, inferred from paleomagnetic data and spatial analysis of mafic dykes


, : Upper-crustal, basement-involved folding in the East Range of the Sudbury Basin, Ontario, inferred from paleomagnetic data and spatial analysis of mafic dykes. Revue Canadienne des Sciences de la Terre 49.9

Tilting of crystalline basement rocks associated with folding strain at uppermost crustal levels is difficult to recognize if basement rocks are devoid of traceable marker planes. Here we use the spatial variation in strike of Paleoproterozoic mafic dyke segments complemented by compiled paleomagnetic data to identify tilting in Archean basement rocks associated with kilometre-scale folds of the eastern Sudbury Basin, Ontario. Spatial analysis of the strike of dyke segments is consistent with generation of the NE lobe and a newly identified anticline, referred to as the West Bay Anticline, in the layered Sudbury Igneous Complex (SIC). This anticline accounts better for the structural characteristics of the eastern Sudbury Basin than a previously proposed anticline with west-plunging hinge line. The West Bay Anticline is characterized by abrupt plan-view thickness variations in the lower SIC and curved faults displaying significant strike separations of SIC contacts. These structural characteristics are consistent with folding strain imparted to the SIC and adjacent Archean rocks during formation of the West Bay Anticline. Sublayer embayments and associated quartz diorite dykes likely served as zones of mechanical weaknesses, at which the higher-order folds localized. Unfolding magnitudes of the NE lobe based on primary paleomagnetic remanence directions are significantly smaller than inferred magnitudes that are based on the assumption that the basal SIC contact was initially planar. Thus, the basal SIC contact in the NE lobe likely had a trough-like geometry at the time of remanence acquisition. We advocate a scenario for the formation of the NE lobe, in which the trough geometry of the SIC is primary rather than a consequence of tilting prior to solidification of, and remanence acquisition in, the SIC. Finally, we caution the interpretation of photo lineaments in eroded basement terranes purely as a consequence of faulting.

(PDF same-day service: $19.90)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 037196145

DOI: 10.1139/e2012-045

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Brand, 1985: Comment on "Observation of a noise-induced phase transition with an analog simulator". Physical Review Letters 54(6): 605-605

Pandey, U. B., 2001: Implementation of integrated development programmes on spices - a resume of activities by NHRDF. This paper presents the programmes taken up by the National Horticultural Research and Development Foundation in India to increase the production of seed spices, particularly coriander, fenugreek, garlic, paprika and chilli, during 2000-01 and tho...

Halaban, R.; Pomerantz, S.H.; Marshall, S.; Lerner, A.B., 1984: Tyrosinase activity and abundance in Cloudman melanoma cells. Rabbit anti-tyrosinase antibodies were used to study the abundance, processing, and degradation of tyrosinase in murine (Cloudman) melanoma cells. The polyclonal antibodies precipitated low-molecular-weight (68,000 and 70,000) and high-molecular-w...

Jpn Soc Biometeorol, 1991: Twenty ninth annual meeting of the japanese society of biometeorology nagasaki japan november 16 17 1990. International Journal of Biometeorology 35(2): 114-122

Tobilevich, V.P.; Loskutova, G.P., 1965: Problems of diagnosis and treatment of malignant tumors of the corpus uteri Current cancer problems. Two hundred ninety hysterographic studies (H) were made in 1958-1964 for diagnosing carcinoma of the body of the uterus (CBU). In 120 cases CBU was found. Comparison of H with histopatho-logical data confirmed the accuracy of the method, which det...

Arunachalampillai, A.; Olsson, D.; Wendt, O.F., 2010: Synthesis and characterisation of PCsp3P phosphine and phosphinite iridium complexes. Cyclometallation and dehydrogenation of a cyclohexyl ring. A cyclohexyl based pincer phosphine ligand undergoes cyclometalation with an iridium cyclooctadiene precursor to give a highly thermally stable iridium(III) complex where a C(sp3)-H bond has been oxidatively added. This iridium(III) hydride comple...

Shrake, D.L.; Brockman, C.S.ott; Swinford, E.M.c; Vorbau, K.E., 2001: Surficial geology of the upper Scioto River watershed. Ohio Journal of Science 101(1): A 25, March

Pearse A.G.E., 1975: Morphology and physiology of growth hormone release inhibiting hormone somatostatin in the gastro intestinal tract. Clinical Science & Molecular Medicine: 26p

LEONI, A., 1952: Typhoid and paratyphoid fevers in Milan. Rivista Dell'istituto Sieroterapico Italiano 27(1): 9-28

Schnitzer, T.J., 2006: Pain management today - optimising the benefit/risk ratio: defining the role of weak opioids and combination analgesics. Clinical Rheumatology 25 Suppl 1: S1-S1