Preliminary Assessment of the Structural Controls of Neal Hot Springs Geothermal Field, Malhuer County, Oregon

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Journal Article: Preliminary Assessment of the Structural Controls of Neal Hot Springs Geothermal Field, Malhuer County, Oregon

Abstract
The Neal Hot Springs geothermal field is marked by hotsprings that effuse from opaline sinter mounds just north of BullyCreek, in Malheur County, Oregon. Production wells have highflow rates and temperatures above 138C at depths of 850-915 m.On a regional scale, the geothermal field occupies a broad zonewithin the intersection between a regional, N-striking, normalfault system within the Oregon-Idaho graben and a regionalNW-striking, normal fault system within the western Snake RiverPlain (Vale fault zone). Locally, the system appears to lie near thesouthern terminus of a major N-striking, W-dipping normal faultzone where it intersects at least one major E-dipping normal fault.Both fault zones appear to have accommodated Quaternary displacement(probably Pleistocene). Multiple fault splays associatedwith the fault intersection and horse-tailing end of the W-dippingfault zone probably account for increased permeability in the areathereby facilitating the geothermal activity.

Authors 
Joel H. Edwards and James E. Faulds








Published Journal 
Geothermal Resources Council Transactions, 2012





DOI 
Not Provided
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Online 
Internet link for Preliminary Assessment of the Structural Controls of Neal Hot Springs Geothermal Field, Malhuer County, Oregon

Citation

Joel H. Edwards,James E. Faulds. 2012. Preliminary Assessment of the Structural Controls of Neal Hot Springs Geothermal Field, Malhuer County, Oregon. Geothermal Resources Council Transactions. 36(N/A):891-895.


Related Geothermal Exploration Activities
Activities (1)


Areas (1)
  1. Neal Hot Springs Geothermal Area
Regions (0)