Inactive

1.0 INTRODUCTION The USGS needs to acquire depth profile single crystal U-Pb zircon analysis from rock samples. 2.0 BACKGROUND The USGS conducts research on regional geology related to energy, mineral... 1.0 INTRODUCTION The USGS needs to acquire depth profile single crystal U-Pb zircon analysis from rock samples. 2.0 BACKGROUND The USGS conducts research on regional geology related to energy, minerals, and hazards. This involves making geologic maps of the area being investigated, and reconstructing the tectonic, climatic, erosional and depositional histories of rocks within the study region. Depth profiling U-Pb zircon geochronology is a key technique for determining age(s) from single zircon crystals. This is a unique analytical procedure used to determine complexities within zircon, including insight into growth histories. Additionally, the depth profiling technique is ideal for zircons which may be analyzed via multiple analyses as grains are largely preserved which permits future CA-TIMS, (U-Th/He) and detrital U-Pb-He double dating, from previously analyzed grains. The preservation of zircon via the depth profiling technique, as typical U-Pb zircon LA-ICP-MS analysis results in the destruction of half the mineral grain. The samples submitted for depth profiling analyses will help us elucidate the erosional, climatic and depositional histories for the greater Permian and Appalachian basins. 3.0 SCOPE Depth profiling of U-Pb zircon analysis to be completed on 2,500 zircon grains, which are poured onto double sided sticky tape, mounted on acrylic disks. Unpolished disks are placed into a large volume Helex sample cell and ablated using a PhotonMachine Analyte G.2 Excimer Laser that is attached to an Element2 HR-ICP-MS. The U-Pb depth ratios are collected through time on from single zircon crystal and reduced offline using visual age in iolite. Final ratios and age data are imported into Excel Spreadsheet format. 4.0 APPLICABLE DOCUMENTS Publications documenting state-of-the-art analytical methods for collection and interpretation of Depth-profiling U-Pb analysis. Liu L., Stockli, D., Lawton, T., Xu, J., Stockli, L., Fan, M., and Nadon, G., 2022 Reconstructing source-to-sink systems from detrital zircon core and rim ages. Geology 50, 691¿696. doi: https://doi.org/10.1130/G49904.1 Lawton, T.F., Blakey, R.C., Stockli, D.F., Liu, L., 2021. Late paleozoic (late Mississippian¿middle Permian) sediment provenance and dispersal in western Equatorial Pangea. Palaeogeography, Palaeoclimatology, Palaeoecology 572, 110386. doi:10.1016/j.palaeo.2021.110386 Soto-Kerans, G., Stockli, D., Janson, X., Lawton, T., Covault, J., 2020, Orogen proximal sedimentation in the Permian foreland basin. Geosphere 6 567¿593. doi: https://doi.org/10.1130/GES02108.1 Liu, L., Stockli, D.F., 2019. U-PB ages of detrital zircons in lower Permian sandstone and siltstone of the Permian Basin, West Texas, USA: Evidence of dominant Gondwanan and peri-gondwanan sediment input to Laurentia. GSA Bulletin 132, 245¿262. doi:10.1130/b35119.1 Ross, C.H., Stockli, D., Rasmussen, C., Gulick, S., de Graaff, S., Claeys, P., Zhao, J., Xiao, L., Pickersgill, AE., Schmieder, M., Kring, D., Wittmann, A., Morgan, J., 2021 Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure. GSA Bulletin 134, 241¿260. doi: https://doi.org/10.1130/B35831.1 THIS IS NOT A SOLICITATION. ALL COSTS ASSOCIATED WITH PROVIDING INFORMATION AS REQUESTED BY THIS SOURCES SOUGHT NOTICE SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR. Submission is voluntary. The full scope of work will be provided with any solicitation that may be issued. The Government is not required to issue a solicitation. Responses to this announcement are requested from (A) SBA certified Small Business HubZone firms; (B) Small Business firms certified by a Small Business Administration (SBA) district or regional office for participation in the 8(a) program; (C) Service-Disabled Veteran-Owned small Business firms; (D) Small Businesses; (E) Women Owned Small Businesses; and (F) Large Businesses. In response to this announcement, please indicate your firm's socioeconomic status (e.g. small business, service-disabled veteran-owned, women owned, HUBZone, etc.) This information will assist the Government in determining how small businesses can fit into the acquisition strategy. Any information submitted is voluntary. If sufficient interest and capability is not received from firms in categories (A) through (E) above, any solicitation may be issued as unrestricted without further consideration. Interested business firms shall submit (1) NAME, ADDRESS, and PHONE NUMBER OF THE FIRM (including an active SAM Registration); (2) a CAPABILITY STATEMENT including (a) RECENT (within the last three fiscal years) RELEVANT (similar projects to this requirement) performance history (identify the name of the owner and their point(s) of contact with telephone and fax numbers, e-mail addresses; and (b) in what capacity (e.g., prime, subcontractor etc.) they performed the work; and (3) their SIZE STATUS, (4) Active SAM Registration. All responses must be submitted NLT July 15, 2022, at 12:00 PM ET Time via e-mail to: isuryaty@usgs.gov This is NOT a Request for Proposal (RFP) or Invitation for Bid (IFB) and does not constitute any commitment by the Government. Responses to this sources sought notice will be used by the Government to make appropriate acquisition decisions. All interested sources must respond to future solicitation announcements separately from responses to this market survey. 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