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Clay Minerals as Indicators of Sediment Source in Tidal Estuaries of Long Island Sound

Published online by Cambridge University Press:  01 July 2024

B. L. Sawhney  and
C. R. Frink
B. L. Sawhney
Affiliation:
The Connecticut Agricultural Experiment Station, New Haven, Conn. 06504
C. R. Frink
Affiliation:
The Connecticut Agricultural Experiment Station, New Haven, Conn. 06504
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Abstract

Clay minerals were used as indicators for determining the source of sediment in recently dredged harbors along the north shore of Long Island Sound. Amount and characteristics of clay minerals in sediments from the dredged channels were compared to their amount and characteristics in the surrounding soils and in sediments from Long Island Sound. Clay minerals in sediments from the channels were similar in amount and characteristics to clay minerals in sediments from Long Island Sound but differed from those in the surrounding soils in the watershed. Thus, the main source of deposits in the channels is the bottom sediment of Long Island Sound which is transported to the channels by tidal action. These conclusions are supported by recent studies of the bottom currents in the Sound.

Резюме

Резюме

Глинистые породы были использованы как показатели для определения источника осадков в недавно углубленных гаванях вдоль северного берега пролива Лонг-Айленд. Количество и характеристики глинистых минералов в осадках из углубленных каналов сравнивались с их количеством и характеристиками в окружающих почвах и в осадках из пролива Лонг-Айленд. Глинистые минералы в осадках из каналов были аналогичны в отношении количества и характеристик глинистым минералам в осадках из пролива Лонг-Айленд, но отличались от глинистых минералов в окружающих почвах на водоразделе. Таким образом, главным источником отложений в каналах являются донные осадки пролива Лонг-Айленд, которые переносились з каналы приливами. Эти заключения подтверждаются недавними исследованиями донных течений в проливе.

Kurzreferat

Kurzreferat

Tonmineralien wurden als Indikatoren,für die Bestimmung von Sedimenten in neu-ausgebaggerten Häfen an der Nord-Küste von Long Island Sound, benutzt. Mengen und Charakteristiken der Tonmineralien in Sedimenten von den ausgebaggerten Kanälen, wurden mit den Mengen und Charakteristiken der umliegenden Erden und der Sedimente von Long Island Sound, verglichen. Die Mengen und Eigenschaften der Tonmineralien in Sedimenten von den Kanälen waren denen, der Tonmineralien in Sedimenten von Long Island Sound ähnlich, aber unterschieden sich von denen in den umliegenden Erden der Wasserscheide. Aus dem Grunde,ist der Hauptursprung der Ablagerungen in den Kanälen,die Bodensedimente des Long Island Sound, die in die Kanäle durch die Wirkung der Gezeiten transportiert werden. Diese Ergebnisse werden durch neue Untersuchungen der Bodenströme im “Sound” bestätigt.

Résumé

Résumé

Des minéraux argileux ont été employés comme indicateurs pour déterminer la source de sédiments récemment dragués dans des ports de la côte nord du Long Island Sound. Les quantités et les caractéristiques des minéraux argileux dans les sédiments dragués des chenaux ont été comparés à leurs quantités et caractéristiques dans les sols et les sédiments du Long Island Sound. Les minéraux argileux dans les sédiments provenant des chenaux étaient semblables aux minéraux argileux provenant des sédiments du Long Island Sound du point de vue de leurs caractéristiques et de leurs quantités, mais étaient différants de ceux dans les sols aux alentours dans la même zone de drainage. Par conséquent, la source principale des dépôts dans les chenaux est le sédiment de fond du Long Island Sound, transporté dans les chenaux par l'action des marrées. Ces conclusions sont appuyées par de récentes études des courants de fond du Long Island Sound.

Keywords

ClaySedimentSedimentationSoil
Type
Research Article
Information
Clays and Clay Minerals , Volume 26 , Issue 3 , June 1978 , pp. 227 - 230
Copyright
Copyright © 1978, The Clay Minerals Society

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