Drilling Report- First CSDP (Continental Scientific Drilling Program) Thermal Regimes Core Hole Project at Valles Caldera, New Mexico (VC-1)

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Report: Drilling Report- First CSDP (Continental Scientific Drilling Program) Thermal Regimes Core Hole Project at Valles Caldera, New Mexico (VC-1)

Abstract
This report is a review and summary of the core drilling operations of the first Valles Caldera research borehole (VC-1) under the Thermal Regimes element of the Contintental Scientific Drilling Program (CSDP). The project is a portion of a broader program that seeks to answer fundamental scientific questions about magma, rock/water interactions, and volcanology through shallow (<1-km) core holes at Long Valley, California; Salton Sea, California; and the Valles Caldera, New Mexico. The report emphasizes coring operations with reference to the stratigraphy of the core hole, core quality description, core rig specifications, and performance. It is intended to guide future research on the core and in the borehole, as well as have applications to other areas and scientific problems in the Valles Caldera. The primary objectives of this Valles Caldera coring effort were (1) to study the hydrogeochemistry of a subsurface geothermal outflow zone of the caldera near the source of convective upflow, (2) to obtain structural and stratigraphic information from intracaldera rock formations in the southern ring-fracture zone, and (3) to obtain continuous core samples through the youngest volcanic unit in Valles Caldera, the Banco Bonito rhyolite (approximately 0.1 Ma). All objectives were met. The high percentage of core recovery and the excellent quality of the samples are especially notable. New field sample (core) handling and documentation procedures were successfully utilized. The procedures were designed to provide consistent field handling of the samples and logs obtained through the national CSDP.

Authors 
John C. Rowley, Ward Hawkins and Jamie N. Gardner








Published 
Los Alamos National Laboratory, NM, 1987



Report Number 
LA-10934-OBES


DOI 
Not Provided
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Online 
Internet link for Drilling Report- First CSDP (Continental Scientific Drilling Program) Thermal Regimes Core Hole Project at Valles Caldera, New Mexico (VC-1)

Citation

John C. Rowley,Ward Hawkins,Jamie N. Gardner. 1987. Drilling Report- First CSDP (Continental Scientific Drilling Program) Thermal Regimes Core Hole Project at Valles Caldera, New Mexico (VC-1). Los Alamos, NM: Los Alamos National Laboratory, NM. Report No.: LA-10934-OBES.