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The chemistry of eolian quartz dust and the origin of chert

Dates

Publication Date
Time Period
2016

Citation

Dulong, F.T., Cecil, C.B., and Hemingway, B.S., 2018, The chemistry of eolian quartz dust and the origin of chert: U.S. Geological Survey data release, https://doi.org/10.5066/P9SA2M1L.

Summary

Temporal and spatial sources of silica for chert remain poorly constrained. Modern sources to the worlds oceans include silica in rivers > aeolian (dust) deposition > sea floor vents and submarine weathering. However, changes in aridity and dust flux during the Phanerozoic may explain variations in the ocean silica cycle and times and places of chert formation. The chemistry of fine quartz dust (FQD) provides a chemical mechanism for the transformation of FQD to polymorphs of silica in chert; FQD is readily dissolved, then reprecipitated as Opal-A by either biotic or abiotic processes. An unequivocal relation between increases in dust flux and biogenic opal-A in the western Pacific Ocean during the past 200 kyr helps explain why [...]

Contacts

Point of Contact :
Frank T Dulong
Originator :
Frank T Dulong, C Blaine Cecil, Bruce S Hemingway
Metadata Contact :
Eric A Morrissey
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Energy Resources Program
USGS Mission Area :
Energy and Minerals

Attached Files

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Product_10.5066P9SA2M1L_DATA.docx 62.46 KB
Product_10.5066P9SA2M1L_METADATA.xml
Original FGDC Metadata

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Purpose

Describe amount, percent, of size fractions from crushed quartz after prescribed settling times.

Map

Communities

  • Energy Resources Program
  • USGS Data Release Products

Tags

Provenance

Please see attached metadata record for full dataset provenance.

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P9SA2M1L

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