Brothers Fault Zone

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Brothers Fault Zone D. Dziekan

description

Brothers Fault Zone. D. Dziekan. Overview. Regionally extensive fault zone Faulting strikes mainly northwest Alec Butte overlooks faulting. Alec Butte. Cinder cone Overlies olivine basalt dated at 6.68ma Formed before faulting Cut by faults 2.89 ma Iron Mt. unbroken - PowerPoint PPT Presentation

Transcript of Brothers Fault Zone

Page 1: Brothers Fault Zone

Brothers Fault Zone

D. Dziekan

Page 2: Brothers Fault Zone

Overview

• Regionally extensive fault zone

• Faulting strikes mainly northwest

• Alec Butte overlooks faulting

Page 3: Brothers Fault Zone
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Alec Butte

• Cinder cone

• Overlies olivine basalt dated at 6.68ma

• Formed before faulting– Cut by faults

• 2.89 ma Iron Mt. unbroken

• Dating planned of Alec Butte– determine if faults happened post 2.89ma

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Dashed northwest, solid northeast

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Brother’s Fault

• Dextral oblique-normal fault

• Strike-slip to dip-slip ratio 1:1

• Some faults crosscut normal strike

• Model designed to explain crosscut faults

Page 7: Brothers Fault Zone
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