|LC Classifications||QE 604 C874 1996 thesis|
|The Physical Object|
This thesis addresses the spatial distribution of structures and deformation geometry in the southern Sudbury Basin, Ontario, a synclinal fold basin. Major components are low-temperature fabric development in the Sudbury Igneous Complex (SIC), the relation between fabrics and foldAuthor: Iris Lenauer. The Sudbury Basin is highly asymmetric, evident by variation in the dips of the SIC contacts (Dreuse et al., ) and metamorphic foliation (Shanks and Schwerdtner, a, Shanks and Schwerdtner, b, Lenauer and Riller, b) notably in the northern and the southern SIC, i.e., the North Range and the South Range ().In the North Range, the SIC dips moderately toward the Basin centre and Cited by: 2. The Sudbury Structure is a ∼27 × 60 km oval-shaped basin with an original diameter estimated to be – km (Peredery and Morrison, , Grieve, , Spray and Thompson, , Spray et al., ).The oval shape is believed by Shanks and Schwerdtner, a, Shanks and Schwerdtner, b to be the result of deformation during late stages of the Penokean orogeny (– Ga).Cited by: • The Sudbury Basin or Structure was formed by the impact of a 10 km meteorite. • This is the second largest impact crater in the world. • The original crater is guessed to be about km in diameter. • Impact occurred about billion years ago. • Original crater altered by subsequent geologic processes.
Abstract. Abstract— The Offset Dikes of the Ga Sudbury Igneous Complex (SIC) constitute a key topic in understanding the chemical evolution of the impact melt, its mineralization, and the interplay between melt migration and impact-induced deformation. The origin of the melt rocks in Offset Dikes as well as mode and timing of their emplacement are still a matter of by: To be published in the Journal of Geophysical Research J. Geophys. Res. (5) Implications of Transient Deformation in the Northern Basin and Range, Western United States Ashutosh Chamoli1,2,*, Anthony R. Lowry3, Tamara N. Jeppson4 1National Geophysical Research Institute, Council of Scientific & Industrial Research, Hyderabad, India. The importance of discontinuous deformation in the eastern Sudbury Igneous Complex General geology of the Sudbury Structure The Geology and Ore De-posits of the Sudbury Structure Jan D Doman. The Garson Ni–Cu–platinum group element deposit is a deformed, overturned, low Ni tenor contact-type deposit along the contact between the Sudbury Igneous Complex (SIC) and stratigraphically underlying rocks of the Huronian Supergroup in the South Range of the Ga Sudbury structure. The ore bodies are coincident with steeply south-dipping, north-over-south D1 shear zones, Cited by:
Read "Fold origin of the NE-lobe of the Sudbury Basin, Canada: Evidence from heterogeneous fabric development in the Onaping Formation and the Sudbury Igneous Complex, Journal of Structural Geology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. The occurrence of shock metamorphic features substantiates an impact origin for the Ga old Sudbury Structure, but this has not been universally accepted. Recent improvements in knowledge of large-scale impact processes, combined with new petrographic, geochemical, geophysical (LITHOPROBE) and structural data, allow the Sudbury Structure to be interpreted as a multi-ring Cited by: Along with other eastern North American rift basins, it has incurred significant post-rift deformation. Previous authors have identified three phases of deformation in the Hartford basin: WNW-ESE extension (rifting), NNE-SSW shortening (basin-parallel inversion), and E-W shortening (consistent with the current state of stress on the eastern. Paleomagnetic results from fine-grained samples of Sudbury breccia, collected from 28 sites around the northern half of the Ga Sudbury Igneous Complex (SIC), reveal the existence of two major components of magnetization, A and B. A, carried by magnetite, was formed close to the time of the SIC and has a direction that is related to the dip of the norite unit within the different ranges.