B--Nd Isotope Analysis

expired opportunity(Expired)
From: Federal Government(Federal)
140G0321Q0178

Basic Details

started - 30 Jul, 2021 (about 2 years ago)

Start Date

30 Jul, 2021 (about 2 years ago)
due - 06 Aug, 2021 (about 2 years ago)

Due Date

06 Aug, 2021 (about 2 years ago)
Bid Notification

Type

Bid Notification
140G0321Q0178

Identifier

140G0321Q0178
INTERIOR, DEPARTMENT OF THE

Customer / Agency

INTERIOR, DEPARTMENT OF THE (63280)US GEOLOGICAL SURVEY (5352)OFFICE OF ACQUISITON GRANTS (1256)
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Notice of IntentThis is a notice of intent to solicit from a single source.The U.S. Geological Survey (USGS), intends to award a purchase order to University of South Carolina (USC), Columbia, SC, for isotope analyses services as described in the attached Statement of Work.Award will be made in accordance with Federal Acquisition Regulation (FAR) 13.106-1(b) and the procedures at FAR Part 12 entitled, Acquisition of Commercial Items and FAR Part 13 entitled, Simplified Acquisition Procedures. USC is, to the USGS' knowledge, the only source who can perform the combination of analyses required on a commercial basis.The purpose of this notice is to satisfy the requirements of FAR Subpart 5.2. This notice of intent is not a request for competitive quotes. However, all responsible parties may submit a quotation by the closing date of this announcement which shall be considered by the agency. No solicitation will be issued. A determination not to compete this action based upon responses
received is in the sole discretion of the Government.The NAICS code for this action is 541380, Testing Laboratories.Responses or inquiries shall only be accepted through electronic mail addressed to dallan-loucks@usgs.gov and must be uploaded and received in their entirety no later than 08/06/2021/1500 ES. Responses submitted by hardcopy shall not be accepted or considered.US Geological SurveyAlaska Science CenterStatement of Work1.0 INTRODUCTIONThe USGS requires radiogenic isotope and platinum group element analyses.2.0 BACKGROUNDThe USGS conducts research on regional geology and mineral resources. This work involves analyzing the genetic origins of magmas and partially melted residuum in the regions being investigated and reconstructing the tectonic and metallogenic history. The isotopic ratios of radiogenic elements (i.e., Sr, Nd, Hf, Os) and platinum group element (PGE) concentrations are extremely useful in characterizing the sources of mafic and ultramafic rocks in this line of research towards elucidating the geologic context of mineral resources in Alaska.3.0 SCOPEUSGS will submit geologic sample materials for isotope, trace element and PGE analyses at the Center for Elemental Mass Spectrometry, University of South Carolina School of Earth, Ocean, and Environment (USC). Samples processed under this PO will support geochemistry and geochronology initiatives already underway.4.0 TECHNICAL REQUIREMENTSThe isotopic ratios of immobile radiogenic elements (i.e., Sr, Nd, Hf, Os) are extremely useful in characterizing the sources of mafic and ultramafic rocks. However, low concentrations of incompatible trace elements including Nd and Hf in ophiolitic rocks requires a methodological approach that considers the inherent possibility that alteration may have modified the original isotope compositions. For this work, Sr, Nd and Hf isotopes will be analyzed at USC on pristine clinopyroxene separates (after Bizimis, 2013, Mallick et al., 2015, Frisby et al., 2016a) processed from variably serpentenized mafic and ultramafic rock samples. USC will crush and separate clinopyroxene fractions for the isotope measurements, and will optimize these analyses by first measuring trace element concentrations of parent/daughter elements in the clinopyroxenes by laser ablation ICPMS (after Frisby et al., 2016b) to determine amounts of material required to digest for isotope analysis. For a subset of these samples, USC will analyze high-precision Lu/Hf and Sm/Nd parent daughter isotope ratios by isotope dilution methods to constrain melt extraction ages.Additional analyses at USC will use bulk rock powders that the USGS will submit to the lab. These include Os isotopes, which are less likely (than Sr, Hf, Nd) to have been affected by alteration of the whole rock. The same aliquot of bulk rock powders will also be analyzed at USC for low-concentration platinum group elements (PGE), which can help determine the melting history and fugacity conditions and, thus, tectonic context of mafic ophiolitic assemblages.At least one USGS and/or JGS standard reference material shall be digested and processed with each of unknown sample batch to ensure procedural accuracy of isotope analyses. The precision and accuracy of isotope measurements will additionally be verified to meet or exceed those documented in reported in Bizimis et al. (2013), Mallick et al (2015), and Frisby et al. (2016a) by bracketing measurements of unknowns with measurements of synthetic standards appropriate for each isotope system (e.g., NBS987, JNdi/La Jolla and JMC-475), provided by the contractor. The Technical Liaison (TL) will inspect every sample report to assure that the quality of the report meets 100% of the standards required by this work statement. If the work fails to meet the standards required, then the contractor shall redo the work at no additional cost to the government.5.0 DELIVERABLESThe contractor (USC) will provide Sr, Hf(±Lu), Nd(±Sm), and Os isotope ratios, PGE concentration analyses, and laser trace element concentrations from clinopyroxene separates, in addition to standards and replicate results, with all analytical results to be furnished in an Excel spreadsheet.6.0 PERIOD OF PERFORMANCE: Date of award through December 31, 20227.0 REFERENCES CITEDBizimis, M., V. J. M. Salters, M. O. Garcia, and M. D. Norman (2013), The composition and distribution of the rejuvenated component across the Hawaiian plume: Hf-Nd-Sr-Pb isotope systematics of Kaula lavas and pyroxenite xenoliths, G-Cubed, 14(10), 4458¿4478, doi:10.1002/ggge.20250.Mallick, S., J. J. Standish, and M. Bizimis (2015), Constraints on the mantle mineralogy of an ultra-slow ridge: Hafnium isotopes in abyssal peridotites and basalts from the 9¿25°E Southwest Indian Ridge, EPSL, 410(C), 42¿53, doi:10.1016/j.epsl.2014.10.048.Frisby, C., M. Bizimis, and S. Mallick (2016a), Hf-Nd isotope decoupling in bulk abyssal peridotites due to serpentinization, ChemGeo, 440(C), 60¿72, doi:10.1016/j.chemgeo.2016.07.006.Frisby, C., M. Bizimis, and S. Mallick (2016b), Seawater-derived rare earth element addition to abyssal peridotites during serpentinization, Lithos, 248-251(C), 432¿454, doi:10.1016/j.lithos.2016.01.025.

3020 STATE UNIVERSITY DRIVE XXXX  SACRAMENTO , CA 95819  USALocation

Place Of Performance : 3020 STATE UNIVERSITY DRIVE XXXX SACRAMENTO , CA 95819 USA

Country : United StatesState : California

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Classification

naicsCode 541380Testing Laboratories and Services
pscCode B517Geological Studies