"We propose to provide chemical analyses and petrographic descriptions of selected samples from State of Hawaii Scientific Observation Holes 1, 2 and 4.

Hulsebosch, Thomas P.

Sinton, John

ScholarSpace at University of Hawai'i at Manoa

A Proposalfor theCHEMICAL AND MINERALOGICAL CHARACTERIZATION OF SOH CORES.by John Sinton and Tom HulseboschProposed WorkWe propose to provide chemical analyses and petrographic descriptions of selectedsamples from State of Hawaii Scientific Observation Holes 1, 2 and 4. To date a total of aboutIS ,000' of core has been recovered from these three holes. This work will involve the followingtasks:I. Su b-sampling of the core. About IS .:.2S grams of rock are required for the analyticalwork on each sample. Samples will be taken only from the working half of the core.This work will be performed by T. Hulsebosch in consultation with other interestedind ivid uals, possibly including D. Thomas, M . Sykes, H. West and/or others.2. Preparation of a thin section. For each sample a I" X 2" slab will be cut and submittedto the SOEST Thin Section Facility for fabrication of a thin section.3. Preparation of rock powder and XRF samples. The remainder of each sub-sample w illbe crushed in a WC mill to a fine powder. These powders will then be prepared asfused discs and pressed powder pellets for XRF analysis.4, Analysis by XRF. For each sample we will provide quantitative chemical data for Si02,Ti02, A1203 ' Fe203* (total Fe as Fe203), MnO, MgO, CaO, Na20, K20 , P20s, LOr(loss on ignition at 950°C), Sc, Y, Cr, Ni, Cu , Zn , Rb, Sr, Y, Zr, Nb, Ba, La, Ce , Pb,Th , and U . The analyses will be run on the Siemens 303AS, wavelength-dispersive x-ray fluorescence spectrometer system at the University of Hawaii.5. Petrographic description. We will provide a description of each sample that will includete xtures , and igneous and alteration mineralogy.CostsThe following costs are per sample rates attached to the tasks outlined above.'.I. Core sub-sampling and sample preparation2. XR F major and trace element analysis3. Thin section preparation and descriptionTotal per sample$7050150Number 0/ SamplesThe number of samples per core will ultimately determine the value of thisreconnaissance characterization. Detailed scientific studies should sample every flow uni t(typically 1-10'). Following discussions with several persons familiar with Hawaiian stratigraph ywe propose that an average sample spacing for this study be about one every 50'. The exactlocation of each sample will be made based on observed variability within each core. For thesake of preparing a budget we suggest that an average 50' sampling interval will provide a goodfirst-order characterization of the down-hole variability without compromising later proposals tooutside funding agencies . This spacing over 15,000' of core give 300 samples to be analyzed.At the per sample charges outlined above, the total cost of this study is $45,000 .Final ReportFor each hole we will provide logs of the down-hole variability in each of the 28analyzed elements, as well as the petrographic data. This work will be compiled into a technicalreport to be made available to any and all interested parties.,

A proposal for the chemical and mineralogical characterization of SOH cores

http://scholarspace.manoa.hawaii.edu/bitstream/10125/33221/1/Proposal%20for%20the%20Chemical%20and%20Mineralogical%20Characterization%20of%20SOH%20Cores.pdf

A proposal for the chemical and mineralogical characterization of SOH cores

Abstract

Similar works

Full text

Available Versions

ScholarSpace at University of Hawai'i at Manoa