Geologic control on soil composition and properties, Lake Ojibway clay plain, Matagami, Quebec

1985 ◽  
Vol 22 (4) ◽  
pp. 491-500 ◽  
Author(s):  
R. M. Quigley ◽  
A. J. Sethi ◽  
P. Boonsinsuk ◽  
D. E. Sheeran ◽  
R. N. Yong
Keyword(s):  
Relative Activity ◽  
Turbidity Currents ◽  
Soil Composition ◽  
Glacial Geology ◽  
James Bay ◽  
Water Contents ◽  
Varved Clay ◽  
Soil Composition And Properties ◽  
Lake Ojibway

Varved clays deposited in proglacial Lake Ojibway at Matagami, Quebec, were derived from two source areas: carbonate-deficient, Precambrian crystalline igneous rocks from New Quebec to the east and carbonate-rich Palaeozoic rocks from the James Bay lowlands in Ontario to the west. About 50% of the 12–15 m thick clay section consists of varved clays containing less than 3% carbonate, reflecting the New Quebec source. The remaining 50% of the section consists of two pulses of carbonate-enriched varves (15–30% carbonate) derived from rock flour in two glacial advances known as Cochrane I and Cochrane II, which advanced to within 20 km of Matagami.The clays are preconsolidated at the site by a combination of desiccation, groundwater level drawdown, and bonding, in such a way that σp′ is almost constant at 70 kPa at depths from 3.5 to 10 m.High in situ water contents correlate with thinner, low-carbonate, distal varves of high activity. The est correlations are obtained for relative activity, Ac(rel), defined as plasticity index ÷ specific surface area (Ip ÷ SS). Carbonate seems to have effectively neutralized smectite in the Cochrane proximal varves, rendering the distal varves (of New Quebec source) the most active clays at the site. Key words: varved clay, activity, carbonate, turbidity currents, glacial geology.

Geologic control on soil composition and properties, Lake Ojibway clay plain, Matagami, Quebec

1986 ◽  
Vol 23 (4) ◽  
pp. 127
Author(s):  
R.M. Quigley ◽  
A.J. Sethi ◽  
P. Boonsinsuk ◽  
D.E. Sheeran ◽  
R.N. Yong
Keyword(s):  
Soil Composition ◽  
Soil Composition And Properties ◽  
Lake Ojibway

scholarly journals Design and Application of an In Situ Test Device for Rheological Characteristic Measurements of Liquefied Submarine Sediments

2021 ◽  
Vol 9 (6) ◽  
pp. 639
Author(s):  
Hong Zhang ◽  
Xiaolei Liu ◽  
Anduo Chen ◽  
Weijia Li ◽  
Yang Lu ◽  
...  
Keyword(s):  
Yellow River ◽  
Rheological Characteristic ◽  
Yellow River Delta ◽  
Turbidity Currents ◽  
Rheological Characteristics ◽  
Submarine Landslides ◽  
Test Device ◽  
Offshore Area ◽  
In Situ Test

Liquefied submarine sediments can easily lead to submarine landslides and turbidity currents, and cause serious damage to offshore engineering facilities. Understanding the rheological characteristics of liquefied sediments is critical for improving our knowledge of the prevention of submarine geo-hazards and the evolution of submarine topography. In this study, an in situ test device was developed to measure the rheological properties of liquefied sediments. The test principle is the shear column theory. The device was tested in the subaqueous Yellow River delta, and the test results indicated that liquefied sediments can be regarded as “non-Newtonian fluids with shear thinning characteristics”. Furthermore, a laboratory rheological test was conducted as a contrast experiment to qualitatively verify the accuracy of the in situ test data. Through the comparison of experiments, it was proved that the use of the in situ device in this paper is suitable and reliable for the measurement of the rheological characteristics of liquefied submarine sediments. Considering the fact that liquefaction may occur in deeper water (>5 m), a work pattern for the device in the offshore area is given. This novel device provides a new way to test the undrained shear strength of liquefied sediments in submarine engineering.

scholarly journals In-situ measurements of velocity structure within turbidity currents

2004 ◽  
Vol 31 (9) ◽  
pp. n/a-n/a ◽  
Author(s):  
J. P. Xu ◽  
M. A. Noble ◽  
L. K. Rosenfeld
Keyword(s):  
Velocity Structure ◽  
In Situ Measurements ◽  
Turbidity Currents

scholarly journals The electrical self-potential method is a non-intrusive snow-hydrological sensor

2015 ◽  
Vol 9 (4) ◽  
pp. 4437-4457 ◽  
Author(s):  
S. S. Thompson ◽  
B. Kulessa ◽  
R. L. H. Essery ◽  
M. P. Lüthi
Keyword(s):  
Spatial Scales ◽  
Chemical Properties ◽  
Potential Method ◽  
Measurement Procedure ◽  
Theoretical Modelling ◽  
Avalanche Forecasting ◽  
Physical And Chemical ◽  
Self Potential ◽  
Water Contents

Abstract. Our ability to measure, quantify and assimilate hydrological properties and processes of snow in operational models is disproportionally poor compared to the significance of seasonal snowmelt as a global water resource and major risk factor in flood and avalanche forecasting. Encouraged by recent theoretical, modelling and laboratory work, we show here that the diurnal evolution of aerially-distributed self-potential magnitudes closely track those of bulk meltwater fluxes in melting in-situ snowpacks at Rhone and Jungfraujoch glaciers, Switzerland. Numerical modelling infers temporally-evolving liquid water contents in the snowpacks on successive days in close agreement with snow-pit measurements. Muting previous concerns, the governing physical and chemical properties of snow and meltwater became temporally invariant for modelling purposes. Because measurement procedure is straightforward and readily automated for continuous monitoring over significant spatial scales, we conclude that the self-potential geophysical method is a highly-promising non-intrusive snow-hydrological sensor for measurement practice, modelling and operational snow forecasting.

A Late Pleistocene plant-bearing deposit in Currie Township, near Matheson, Ontario

1979 ◽  
Vol 16 (5) ◽  
pp. 1130-1136 ◽  
Author(s):  
W. E. Brereton ◽  
J. A. Elson
Keyword(s):  
River Basin ◽  
Late Pleistocene ◽  
Glacial Lake ◽  
Fossil Plants ◽  
Fossil Plant ◽  
James Bay ◽  
Plant Detritus ◽  
Lake Ojibway ◽  
Moose River ◽  
James Bay Lowlands

Two overburden test holes drilled to bedrock in Currie Township, southwest of Matheson, Ontario, penetrated stratified beds containing fossil plant detritus resting on an oxidized substrate, which are between two till sheets underlying glacial Lake Ojibway-Barlow varved clays. The fossil plants, chiefly mosses, represent an environment that is common in the region today, and are radiocarbon dated (GSC-2148) as older than 37000 years. The interglacial deposit is tentatively correlated with the Missinaibi Formation in the Moose River basin of the James Bay lowlands, probably of Sangamon age.

scholarly journals   Annual dynamics of N2O emissions from a tea field in southern subtropical China

2012 ◽  
Vol 58 (No. 8) ◽  
pp. 373-378 ◽  
Author(s):  
X.Q. Fu ◽  
Y. Li ◽  
W.J. Su ◽  
J.L. Shen ◽  
R.L. Xiao ◽  
...  
Keyword(s):  
Rice Straw ◽  
Soil Mineral ◽  
Subtropical China ◽  
Closed Chamber ◽  
Mineral N ◽  
Straw Mulching ◽  
Inverse Pattern ◽  
Water Contents ◽  
Tea Field

The annual dynamics of N<sub>2</sub>O emissions from a tea field in southern subtropical China was observed in situ weekly in 2010 using a static closed chamber &ndash; gas chromatography (GC) method for three treatments: non-fertilised (CK), conventional (CON) and rice straw mulching (SM). The annual N<sub>2</sub>O emissions for CK, CON and SM were 7.1, 17.2 and 16.7 kg N/ha/year, respectively. The N<sub>2</sub>O emission factors for the CON and SM treatments were estimated as 2.23% and 1.91% of the total fertiliser N applied, respectively. Rice straw mulching exhibited a potential to reduce the N<sub>2</sub>O emissions from the tea field, but not statistically significant (P = 0.82). The daily N<sub>2</sub>O fluxes were positively correlated with the air temperature. The cumulative precipitation of the previous five days was significantly correlated with the daily N<sub>2</sub>O fluxes of CON. The soil water contents were significantly correlated with the daily N<sub>2</sub>O fluxes in the three treatments. The N<sub>2</sub>O fluxes from CON had a more significant correlation with the soil NH<sub>4</sub><sup>+</sup>-N contents than with the soil NO<sub>3</sub><sup>&ndash;</sup>-N contents, while the N<sub>2</sub>O fluxes from SM showed an inverse pattern. The N<sub>2</sub>O fluxes from CK did not show any significant relationship with the soil mineral N content. &nbsp;

Geotechnical problems related to the building of a tailings dam on sensitive varved clay

1982 ◽  
Vol 19 (4) ◽  
pp. 472-482 ◽  
Author(s):  
N. U. Capozio ◽  
J. M. Ouimet ◽  
M. M. Dupuis
Keyword(s):  
Mine Tailings ◽  
Tailings Dam ◽  
Tailings Pond ◽  
Geotechnical Investigations ◽  
The Stability ◽  
Longitudinal Cracks ◽  
Geotechnical Problems ◽  
Varved Clay ◽  
Thick Deposit

At Noranda Mines in Matagami, Quebec, the construction of a 7-m tailings dam was begun in 1974 by hydraulically depositing mine tailings across a lake. A tailings pond was thus created upstream together with a downstream sedimentation pond regulated by a weir. The presence of longitudinal cracks along the crest of the dam was observed in 1978. This generated some doubts as to the stability of the dam which rests on a 24-m thick deposit of soft sensitive varved clay.Following a first study in 1978, the fissured area was used as a berm for yet another embankment which was built upstream of the unstable zone. In order to reevaluate the stability of the structure and the consequences of an eventual dam rupture, second and third geotechnical investigations were undertaken in 1980 and 1981. This paper presents the main conclusions of these investigations. It also includes the results of borings, in-situ vane tests, and stability analyses that were used to study the problem and made the planning of remedial measures possible.

scholarly journals Soil composition and properties: a case study of Shilovsky Upland Oak Forest (Russia)

2019 ◽  
Vol 226 ◽  
pp. 012015
Author(s):  
T Deviatova ◽  
L Alaeva ◽  
L Jablonskikh
Keyword(s):  
Oak Forest ◽  
Soil Composition ◽  
Soil Composition And Properties

In situ photon transmission technique for monitoring formation of hydrogels in real-time at various water contents

Polymer ◽  
2000 ◽  
Vol 41 (16) ◽  
pp. 6335-6339 ◽  
Author(s):  
S Kara ◽  
Ö Pekcan
Keyword(s):  
Real Time ◽  
Transmission Technique ◽  
Water Contents

scholarly journals Long-term in situ observations on typhoon-triggered turbidity currents in the deep sea

Geology ◽  
2018 ◽  
Vol 46 (8) ◽  
pp. 675-678 ◽  
Author(s):  
Yanwei Zhang ◽  
Zhifei Liu ◽  
Yulong Zhao ◽  
Christophe Colin ◽  
Xiaodong Zhang ◽  
...  
Keyword(s):  
Deep Sea ◽  
Turbidity Currents ◽  
In Situ Observations
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