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GEOREF RECORD

To reactivate or not to reactivate; nature and varied behavior of structural inheritance in the Proterozoic basement of the eastern Colorado mineral belt over 1.7 billion years of Earth history

Jonathan Saul Caine, John Ridley and Zachary R. Wessel
To reactivate or not to reactivate; nature and varied behavior of structural inheritance in the Proterozoic basement of the eastern Colorado mineral belt over 1.7 billion years of Earth history (in Through the generations; geologic and anthropogenic field excursions in the Rocky Mountains from modern to ancient, Lisa A. Morgan (editor) and Steven L. Quane (editor))
Field Guide (Geological Society of America) (2010) 18: 119-140

Abstract

The eastern Rocky Mountain Front Range of Colorado has long been a region of geologic interest because of Laramide-age hydrothermal polymetallic vein-hosted ores and associated hypotheses regarding structural inheritance. The mineralized areas are collectively termed the Colorado Mineral Belt (CMB) and are interpreted to have been localized along a persistent and deep-seated zone of weakness in the North American Proterozoic crust. The region hosts a well-exposed array of geologic structures associated with ductile and brittle deformation, which record crustal strain over a period of approximately 1.7 billion years. The Front Range Proterozoic, basement-cored surface uplift has been mapped at numerous scales, resulting in an exceptional structural geologic dataset. However, detailed controls on location, orientation, kinematics, density, permeability, and relative strength of various geological structures in relation to mineral deposit formation are poorly understood. As part of ongoing research, structures resulting from protracted deformation in the Front Range are being reexamined to better understand this complex system. The field trip objectives are to show key localities that exemplify the types of structures present, show recently compiled existing data as well as new data generated from new approaches, offer a new conceptual model, and to foster dialogue. Topics to be discussed include (1) structural history of the eastern Front Range; (2) characteristics, kinematics, orientations, and age of ductile and brittle structures and how they may or may not relate to one another; and (3) characteristics, localization, and evolution of the metal- and non-metal bearing hydrothermal systems in the eastern CMB.


ISSN: 2333-0937
EISSN: 2333-0945
Serial Title: Field Guide (Geological Society of America)
Serial Volume: 18
Title: To reactivate or not to reactivate; nature and varied behavior of structural inheritance in the Proterozoic basement of the eastern Colorado mineral belt over 1.7 billion years of Earth history
Title: Through the generations; geologic and anthropogenic field excursions in the Rocky Mountains from modern to ancient
Author(s): Caine, Jonathan SaulRidley, JohnWessel, Zachary R.
Author(s): Morgan, Lisa A.editor
Author(s): Quane, Steven L.editor
Affiliation: U. S. Geological Survey, Denver, CO, United States
Affiliation: U. S. Geological Survey, Denver, CO, United States
Pages: 119-140
Published: 2010
Text Language: English
Publisher: Geological Society of America, Boulder, CO, United States
ISBN: 978-0-8137-0018-2
References: 82
Accession Number: 2011-056919
Categories: Structural geologyEconomic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch maps
N39°00'00" - N40°00'00", W106°00'00" - W105°00'00"
Secondary Affiliation: Quest University Canada, CAN, CanadaColorado State University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201132
Program Name: USGSOPNon-USGS publications with USGS authors
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