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Modeling of the Climax Stock and Related Plutons Based on the Inversion of Magnetic Data, Southwest Nevada

Open-File Report 2004-1345

Prepared in cooperation with the U. S. Department of Energy National Nuclear Security Administration, Office of Environmental Management, Nevada Site Office, under Interagency Agreement DE-AI52-01NV13944
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Abstract

Two models of the Climax and Gold Meadows stocks were generated using a new method of magnetic inversion modeling based on the pseudogravity anomaly. The first model examined the shape of the two stocks and their connection at depth, concluding that the stocks are connected -4000 m below the ground surface. The second model re-examined the shape and depth of the Climax stock using a two-layer model and new magnetic data collected from drill hole ER-8-1. Existing and new magnetic data support a model of a zoned pluton with increasing magnetization with depth. A model of a zoned pluton was generated and adjusted to fit the magnetic anomaly measured over the stock. The model has an upper layer that extends to a depth of 1,700 m and is magnetized at 0.06 A/m, and a lower layer that extends to a maximum depth of 7,600 m and is magnetized at 0.17 A/m. The model matches the outcrop data, but was unable to match the intercept of the Climax stock from drill hole ER-8-1.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Modeling of the Climax Stock and Related Plutons Based on the Inversion of Magnetic Data, Southwest Nevada
Series title:
Open-File Report
Series number:
2004-1345
Edition:
Version 1.0
Year Published:
2004
Language:
ENGLISH
Description:
21 p.; 8 data files
Additional Online Files(Y/N):
Y