Archean neptunian fissures and early history of the Destor-Porcupine fault zone, Timmins, Ontario, Canada

Neptunian dikes and fissures are intimately associated with a minor Archean sedimentary basin near Timmins, Ontario, in the southwestern part of Abitibi Subprovince of the Canadian Shield. These structures are associated with the late Archean Timiskaming unconformity, and were formed by clastic sedimentation in fissures opened by the reactivation and dilation of basement faults along a major crustal shear. A "pull-apart" origin is indicated for the sedimentary basin by published township maps and the underground geology of the Dome gold mine. The neptunian dikes and fissures are discussed in relation to previous stratigraphic and tectonic interpretations of the Timmins area.

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Paleomagnetism of the 1.1 Ga Lackner Lake Complex and tectonics of the Kapuskasing Structural Zone

Canadian Journal of Earth Sciences ◽

10.1139/e89-150 ◽

1989 ◽

Vol 26 (9) ◽

pp. 1778-1783 ◽

Cited By ~ 8

Author(s):

D. T. A. Symons

Keyword(s):

Fault Zone ◽

Canadian Shield ◽

Superior Province ◽

Thermal Demagnetization ◽

Abitibi Subprovince ◽

Reversed Polarity ◽

Middle Proterozoic

The Middle Proterozoic Lackner Lake Complex is a circular alkalic syenite–carbonatite stock with a diameter of about 5.5 km. It intrudes granulite-rank Archean gneisses in the Kapuskasing Structural Zone of the Wawa Subprovince in the Superior Province of the Canadian Shield. It adjoins the Ivanhoe Lake fault zone, which forms the boundary with the Abitibi Subprovince and is the probable locus of maximum motion between the subprovinces. Specimens from 18 sites in the complex were analyzed paleomagnetically by alternating-field and thermal demagnetization and by saturation isothermal remanence tests. Large, recent viscous remanence components required removal before a stable remanence with a mean direction of 305.4°, 64.1 °(α95 = 5.2°) was isolated. Its pole of 53.7°N, 156.5°W (dp = 6.7°, dm = 8.3°) indicates emplacement at 1108 ± 10 Ma during a brief normal interval in a predominantly reversed-polarity time. This study indicates that there has been no postintrusion tilting of the Kapuskasing Structural Zone and that postintrusion uplift by unroofing did not exceed about 8 km.

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Palaeomagnetic Constraints on the Early History of the Møre-Trøndelag Fault Zone, Central Norway

Paleomagnetic Rotations and Continental Deformation ◽

10.1007/978-94-009-0869-7_26 ◽

1989 ◽

pp. 431-457 ◽

Cited By ~ 8

Author(s):

T. H. Torsvik ◽

B. A. Sturt ◽

D. M. Ramsay ◽

A. Grønlie ◽

D. Roberts ◽

...

Keyword(s):

Fault Zone ◽

Early History ◽

History Of

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Geochronology of the Canadian Shield in Northeastern Alberta II. Charles–Andrew–Colin Lakes Area

Canadian Journal of Earth Sciences ◽

10.1139/e72-070 ◽

1972 ◽

Vol 9 (7) ◽

pp. 863-881 ◽

Cited By ~ 4

Author(s):

H. Baadsgaard ◽

John D. Godfrey

Keyword(s):

Plastic Deformation ◽

Fault Zone ◽

Early Phase ◽

Uranium Mineralization ◽

Canadian Shield ◽

Compositional Heterogeneity ◽

Metamorphic History ◽

History Of ◽

Northeastern Alberta ◽

Broad Outline

The broad outline of the tectonic–metamorphic history of this area is reasonably clear. Whole rock U–Pb, mineral U–Pb, whole rock Rb–Sr, mineral Rb–Sr, and mineral K–Ar data have resulted in the recognition of a narrow discontinuous N–S zone of Archean (> 2550 m.y.) granitic material which may predate the surrounding widespread migmatitic–gneissic complex. Other N–S belts of younger granitic to dioritic plutons (1900 m.y.) intrude the gneissic complex. A last severe thermal metamorphic event sharply 'reset' mica K–Ar dates for all bodies in the area to 1790 ± 40 m.y. The recently identified Archean belt is located in the Allan fault zone: a complex major zone of weakness which has undergone repeated activation involving deep seated folding, mylonitization, and multiple intrusion, with late plastic deformation and recrystallization of the mylonite belts. The unraveling of the tectonic–metamorphic history of the area is greatly complicated by multiple metamorphic effects and the compositional heterogeneity of the para– and ortho–gneissic materials of the migmatitic–gneissic complex. Local uranium mineralization in this area is geochronologically related to intrusion of the younger granites and is essentially contemporaneous with the main early phase of uranium deposition in the Uranium City area of Saskatchewan.

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Reinterpretasi Makna Nafkah dalam Bingkai Islam Nusantara

AL-IHKAM Jurnal Hukum & Pranata Sosial ◽

10.19105/al-lhkam.v13i1.1548 ◽

2018 ◽

Vol 13 (1) ◽

pp. 97-120

Author(s):

Ahmad Rajafi

Keyword(s):

Early History ◽

Local Culture ◽

History Of ◽

Major Treatment ◽

A Minor ◽

Economic Agreement

The controversy about the concept of nafkah in Islam seems never ending, especially the strengthened of Islamic trans-national understanding in society which emphasizes the importance of Qur'an but with the scriptualistic model and denying other elements that can be formulated as a means to reinterpret verses of God, such as the verse of nafkah living that is used as a justification of men's power over the women. So that, examine the harmony of revelation and local culture in the context of the verse about nafkah with the approach of Islamic Nusantara is important to be explained in order to be create a responsive understanding and shalih li kulli zamân wa makân. The direction of that reinterpretation formulates the concept of economic agreement in a family, where the reading of the verse must be related to the early history of Islam which treats women in a minor but with positive progress toward the major treatment, so that women (wives) who were previously prohibited in earning of nafkah could be transformed to participate in constructing the economic family or even as the main provider of nafkah in a family.

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The lowering of high vowels before [r] in Latin

Papers in Historical Phonology ◽

10.2218/pihph.5.2020.4416 ◽

2020 ◽

Vol 5 ◽

pp. 1-10

Author(s):

András Cser

Keyword(s):

Sound Change ◽

Early History ◽

The Other ◽

Interesting Problem ◽

Other Hand ◽

History Of ◽

High Vowels ◽

A Minor

This paper discusses a putative sound change in the early history of Latin and synchronic alternations apparently related to it. The lowering of short high vowels before the rhotic is problematic on several counts; so much so that serious doubt has been cast on its reality. On the other hand, due to widespread alternations in the morphophonology of Classical Latin it is reasonable to assume that such a lowering operated as a synchronic rule at that stage. A minor asymmetry in the relevant alternations of verbal affixes in infectum-based vs. perfectum-based formations presents an interesting problem to which I suggest two tentative explanations.

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XXI.—John Crowne and America

PMLA ◽

10.2307/457347 ◽

1920 ◽

Vol 35 (4) ◽

pp. 447-463

Author(s):

Arthur Franklin White

Keyword(s):

Seventeenth Century ◽

New England ◽

Early History ◽

Harvard College ◽

History Of ◽

A Minor

To those who look askance when the drama of the last forty years of the seventeenth century is mentioned, it may be a doubtful honor to connect a minor Restoration playwright with the early history of America. But the fact remains that John Crowne, one of the most prolific of the dramatists of this period, was for three years a resident of New England and a student at Harvard College. He is now remembered chiefly as the author of Sir Courtly Nice, a comedy which held the boards for almost a hundred years.

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Some early history of replica techniques for electron microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100130018 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1076-1077

Author(s):

Robert M. Fisher

Keyword(s):

Thin Film ◽

Electron Microscopy ◽

Optical Microscope ◽

Early History ◽

Bulk Materials ◽

Thin Sections ◽

Transmission Electron ◽

Reflected Light ◽

History Of ◽

Electron Microscopes

By 1940, a half dozen or so commercial or home-built transmission electron microscopes were in use for studies of the ultrastructure of matter. These operated at 30-60 kV and most pioneering microscopists were preoccupied with their search for electron transparent substrates to support dispersions of particulates or bacteria for TEM examination and did not contemplate studies of bulk materials. Metallurgist H. Mahl and other physical scientists, accustomed to examining etched, deformed or machined specimens by reflected light in the optical microscope, were also highly motivated to capitalize on the superior resolution of the electron microscope. Mahl originated several methods of preparing thin oxide or lacquer impressions of surfaces that were transparent in his 50 kV TEM. The utility of replication was recognized immediately and many variations on the theme, including two-step negative-positive replicas, soon appeared. Intense development of replica techniques slowed after 1955 but important advances still occur. The availability of 100 kV instruments, advent of thin film methods for metals and ceramics and microtoming of thin sections for biological specimens largely eliminated any need to resort to replicas.

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