About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 39 (1955)

Issue: 3. (March)

First Page: 338

Last Page: 345

Title: Occurrence of Detrital Magnetite and Ilmenite in Red Sediments: New Approach to Significance of Redbeds: GEOLOGICAL NOTES

Author(s): D. N. Miller, Jr. (2), Robert L. Folk (2)

Abstract:

In mottled red and green sedimentary rocks, detrital magnetite and ilmenite are abundant in the red zones and have been removed by solution from the reduced zones. Study of available specimens has shown that all redbeds contain detrital magnetite or ilmenite, commonly in abundance; gray, green, or white sedimentary rocks contain little or none. It is suggested, therefore, that the formation of redbeds depends primarily on the presence of an igneous or metamorphic source which supplies detrital magnetite or ilmenite, and is only indirectly dependent on climate or environment of deposition. This hypothesis explains why most redbeds are related to the arkose or graywacke clans. Magnetite is abundant as an accessory mineral in igneous rocks; its general paucity in all except he red sediments is caused by its solution under the reducing conditions in which most sediments form.

Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Watermarked PDF Document: $14
Open PDF Document: $24

AAPG Member?

Please login with your Member username and password.

Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].