About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
Volume:
Issue:
First Page:
Last Page:
Title: Structural
Significance and Analysis of Mid-Continent Gravity High
Author(s):
Abstract:
The Mid-Continent gravity high is a large gravity anomaly which extends from Lake Superior to Oklahoma, and occupies the center of a 300 mi-wide fault system which crosses the center of the North American continent. This basement feature can be related to Keweenawan faults and intrusives near Lake Superior. Throughout the Paleozoic Era movement continued along these faults, resulting in several anomalies that were mapped in Kansas, Nebraska, Iowa, and Minnesota.
A new technique of gravity analysis involving the fitting of nonorthogonal polynomial surfaces to gravity data is particularly applicable to the study of basement geology as delineated by gravity measurements. The polynomial analysis shows a detailed correlation of the gravity residuals with both basement geology and Paleozoic structure. It is apparent that in the central United States this relationship of old zones of weakness to younger movement is the norm rather than the exception.
Unfortunately, the lack of drill holes makes study of the basement geology difficult. This leaves the task to geophysical methods. The use of the computer and new techniques of analysis improve study efforts but it is only through a combination of the geophysical methods, computers, and all available geologic information that the most nearly accurate conclusion can be reached.
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].