Late Cenozoic geologic controls on placer-gold distribution in the Nome nearshore area

Darrell S Kaufman, D. M. Hopkins

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The spatial distribution of particulate gold in sediments blanketing the coastal plain at Nome is the product of a complex late Cenozoic geologic history. The diverse glacial, marine, fluvial, and deformational processes that shaped the sedimentary sequence on the emergent coastal plain have operated on the submerged continental shelf south of Seward Peninsula. Within the area extending approximately 5 km seaward of Nome, gold values in the top 20 m of sediment do not decrease seaward. The greatest concentrations are found within 4 m of the sea floor; lag-gravel deposits formed on till of the present sea floor are especially enriched. Although erosional surfaces analogous to the present sea floor may be buried within the sequence of Quaternary deposits, the extent of the gold-bearing glacial deposits that would support these surfaces is not fully delineated. Reconstructions must take into account the possibility that glaciers advanced onto the coastal plain during a period of high relative sea level. -from Authors

Original languageEnglish (US)
Pages (from-to)26-45
Number of pages20
JournalUS Geological Survey Bulletin
Volume1903
StatePublished - 1989
Externally publishedYes

Fingerprint

coastal plain
seafloor
gold
glacial deposit
sedimentary sequence
sediment
continental shelf
gravel
glacier
sea level
spatial distribution
history
distribution
product

ASJC Scopus subject areas

  • Geology

Cite this

Late Cenozoic geologic controls on placer-gold distribution in the Nome nearshore area. / Kaufman, Darrell S; Hopkins, D. M.

In: US Geological Survey Bulletin, Vol. 1903, 1989, p. 26-45.

Research output: Contribution to journalArticle

@article{1e5c9709c73d44719682a986654bae2d,
title = "Late Cenozoic geologic controls on placer-gold distribution in the Nome nearshore area",
abstract = "The spatial distribution of particulate gold in sediments blanketing the coastal plain at Nome is the product of a complex late Cenozoic geologic history. The diverse glacial, marine, fluvial, and deformational processes that shaped the sedimentary sequence on the emergent coastal plain have operated on the submerged continental shelf south of Seward Peninsula. Within the area extending approximately 5 km seaward of Nome, gold values in the top 20 m of sediment do not decrease seaward. The greatest concentrations are found within 4 m of the sea floor; lag-gravel deposits formed on till of the present sea floor are especially enriched. Although erosional surfaces analogous to the present sea floor may be buried within the sequence of Quaternary deposits, the extent of the gold-bearing glacial deposits that would support these surfaces is not fully delineated. Reconstructions must take into account the possibility that glaciers advanced onto the coastal plain during a period of high relative sea level. -from Authors",
author = "Kaufman, {Darrell S} and Hopkins, {D. M.}",
year = "1989",
language = "English (US)",
volume = "1903",
pages = "26--45",
journal = "United States Geological Survey Bulletin",
issn = "0083-1093",
publisher = "US Department of the Interior",

}

TY - JOUR

T1 - Late Cenozoic geologic controls on placer-gold distribution in the Nome nearshore area

AU - Kaufman, Darrell S

AU - Hopkins, D. M.

PY - 1989

Y1 - 1989

N2 - The spatial distribution of particulate gold in sediments blanketing the coastal plain at Nome is the product of a complex late Cenozoic geologic history. The diverse glacial, marine, fluvial, and deformational processes that shaped the sedimentary sequence on the emergent coastal plain have operated on the submerged continental shelf south of Seward Peninsula. Within the area extending approximately 5 km seaward of Nome, gold values in the top 20 m of sediment do not decrease seaward. The greatest concentrations are found within 4 m of the sea floor; lag-gravel deposits formed on till of the present sea floor are especially enriched. Although erosional surfaces analogous to the present sea floor may be buried within the sequence of Quaternary deposits, the extent of the gold-bearing glacial deposits that would support these surfaces is not fully delineated. Reconstructions must take into account the possibility that glaciers advanced onto the coastal plain during a period of high relative sea level. -from Authors

AB - The spatial distribution of particulate gold in sediments blanketing the coastal plain at Nome is the product of a complex late Cenozoic geologic history. The diverse glacial, marine, fluvial, and deformational processes that shaped the sedimentary sequence on the emergent coastal plain have operated on the submerged continental shelf south of Seward Peninsula. Within the area extending approximately 5 km seaward of Nome, gold values in the top 20 m of sediment do not decrease seaward. The greatest concentrations are found within 4 m of the sea floor; lag-gravel deposits formed on till of the present sea floor are especially enriched. Although erosional surfaces analogous to the present sea floor may be buried within the sequence of Quaternary deposits, the extent of the gold-bearing glacial deposits that would support these surfaces is not fully delineated. Reconstructions must take into account the possibility that glaciers advanced onto the coastal plain during a period of high relative sea level. -from Authors

UR - http://www.scopus.com/inward/record.url?scp=0024880766&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024880766&partnerID=8YFLogxK

M3 - Article

VL - 1903

SP - 26

EP - 45

JO - United States Geological Survey Bulletin

JF - United States Geological Survey Bulletin

SN - 0083-1093

ER -