The presence, characteristics and earthquake implications of the St. Lawrence fault zone within and near Lake Ontario (Canada–USA)

Wallach, Joe

doi:10.1016/s0040-1951(02)00285-8

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…12). Three samples collected from the southeastern side of the Black Lake fault (Wallach , 2002) yield the oldest Nd model ages of 1613-1634 Ma. In addition, these three samples have the lowest ε Nd values, ranging from 1.52 to 1.80.…”

Section: Toward a Refined Tectonic Model For The Lowlandsmentioning

confidence: 99%

Shawinigan arc magmatism in the Adirondack Lowlands as a consequence of closure of the Trans-Adirondack backarc basin

et al. 2010

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The Antwerp-Rossie metaigneous suite (ARS) represents arc magmatism related to closure of the Trans-Adirondack backarc basin during Shawinigan collisional orogenesis (ca. 1200-1160 Ma). The ARS is of calc-alkaline character, bimodal, and lacks intermediate compositions. Primarily intruding marble and pelitic gneiss, the ARS is spatially restricted to the Adirondack Lowlands southeast of the Black Lake fault. On discrimination diagrams, the ARS samples plot primarily within the volcanic arc granite fi elds. Incompatible elements show an arc-like signature with negative Nb, Ta, P, and Zr and positive Cs, Pb, La, and Nd anomalies relative to primitive mantle. Neodymium model ages (T DM , depleted mantle model) range from 1288 to 1634 Ma; the oldest ages (1613-1634) and smallest epsilon Nd (ε Nd ) values are found in proximity to the Black Lake fault, delineating the extent of Laurentia prior to the Shawinigan orogeny. The epsilon Nd values at crystallization (1200 Ma) plot well below the depleted mantle curve. Geochemical and isotopic similarities to the Hermon granitic gneiss (HGG) (ca. 1182 Ma) and differences from the Hyde School Gneiss-Rockport Granite suites (1155-1180 Ma) suggest that arc plutonism rapidly transitioned into A-type AMCG (anorthosite-mangeritecharnockite-granite) plutonism. Given the short duration of Shawinigan subduction, apparently restricted extent of the ARS (Adirondack Lowlands), location outboard of the pre-Shawinigan Laurentian margin, intrusion into the Lowlands supracrustal sequence, bimodal composition, and recent discovery of enriched mantle rocks in the Lowlands, it is proposed the ARS formed as a consequence of subduction related to closure of a backarc basin that once extended between the Frontenac terrane and the Southern Adirondacks.

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Section: Toward a Refined Tectonic Model For The Lowlandsmentioning

confidence: 99%

Shawinigan arc magmatism in the Adirondack Lowlands as a consequence of closure of the Trans-Adirondack backarc basin

et al. 2010

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“…It is inaccurate to identify the fault buried in the lake directly based on the hue difference of image. The foreign researches about the fault buried in the salt lake identification were rarely too, they were mainly carried out based on the location and frequency of earthquakes and so on (Kassarasa et al, 2014;Wallach, 2002;Paul and Jewell, 2013). Therefore, it is necessary to develop a new method to identify the fault buried in the salt lake.…”

Section: Introductionmentioning

confidence: 99%

The Identification and Geological Significance of Fault Buried in the Gasikule Salt Lake in China based on the Multi‐source Remote Sensing Data

Wang

Zhao

et al. 2021

Acta Geologica Sinica (Eng)

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The salinity of the salt lake is an important factor to evaluate whether it contains some mineral resources or not, the fault buried in the salt lake could control the abundance of the salinity. Therefore, it is of great geological importance to identify the fault buried in the salt lake. Taking the Gasikule Salt Lake in China for example, the paper established a new method to identify the fault buried in the salt lake based on the multi‐source remote sensing data including Landsat TM, SPOT‐5 and ASTER data. It includes the acquisition and selection of the multi‐source remote sensing data, data preprocessing, lake waterfront extraction, spectrum extraction of brine with different salinity, salinity index construction, salinity separation, analysis of the abnormal salinity and identification of the fault buried in salt lake, temperature inversion of brine and the fault verification. As a result, the study identified an important fault buried in the east of the Gasikule Salt Lake that controls the highest salinity abnormal. Because the level of the salinity is positively correlated to the mineral abundance, the result provides the important reference to identify the water body rich in mineral resources in the salt lake.

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“…Jacobi (2002) demonstrated that basement structure in some regions of New York State controlled the distribution and orientation of brittle faults in the overlying Paleozoic strata, and some of the faults had a substantial influence on patterns of Paleozoic sedimentation (Jacobi and Mitchell, 2002). Active seismic zones within and marginal to the Adirondack massif are interpreted to be active fault zones, such as the St. Lawrence fault zone that is coincident with the northeastsouthwest trending St. Lawrence Seaway (Wallach, 2002).…”

Section: Introductionmentioning

confidence: 99%

Applications of water-based magnetic gradiometry to assess the geometry and displacement for concealed faults in the southern Adirondack Mountains, New York, U.S.A

Valentino

Chiarenzelli

Hewitt³

et al. 2012

Journal of Applied Geophysics

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The presence, characteristics and earthquake implications of the St. Lawrence fault zone within and near Lake Ontario (Canada–USA)

Cited by 9 publications

References 13 publications

Shawinigan arc magmatism in the Adirondack Lowlands as a consequence of closure of the Trans-Adirondack backarc basin

Shawinigan arc magmatism in the Adirondack Lowlands as a consequence of closure of the Trans-Adirondack backarc basin

The Identification and Geological Significance of Fault Buried in the Gasikule Salt Lake in China based on the Multi‐source Remote Sensing Data

Applications of water-based magnetic gradiometry to assess the geometry and displacement for concealed faults in the southern Adirondack Mountains, New York, U.S.A

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