The Dinwiddie terrane, formerly the Petersburg Granite (sensu lato), was originally interpreted as a Pennsylvanian - Permian igneous complex located in the eastern Piedmont of Virginia and considered to be a single batholith that comprises different textural varieties, likely assumed to have been emplaced from a single source during Alleghanian metamorphism (Bloomer 1939; Bobyarchick, 1978; Bobyarchick and Glover, 1979). However, mapping in the 2000s and 2010s (Carter and others, 2007; 2010; Carter, 2010; Bleick and others, 2011; Bondurant and others, 2011; Occhi and others, 2015, 2017; Occhi and Swanger, 2019) divided this into five distinct units based on lithology, including a subidiomorphic granite, a porphyritic granite, a foliated granite, a layered granite gneiss, and a megacrystic granite. Though these varieties of granite and gneiss were originally considered to be part of the same unit, Carter and others (2023) evaluated each of these five lithologies on the bases of their geochemistry and geochronology, and determined that the foliated granite and layered granite gneiss are ~100 million years older than the other lithologies and that they record evidence of a different magma source than the subidiomorphic granite, porphyritic granite, and megacrystic granite, prompting the redefinition of the Petersburg Granite (sensu lato) into the Dinwiddie terrane, which encompasses the entire suite of granites and gneisses formerly referred to as the Petersburg Granite (sensu lato). The Dinwiddie terrane can then be divided into the Petersburg Granite (sensu stricto), which is composed of the subidiomorphic granite, porphyritic granite, and megacrystic granite lithologies, and the informal Pocoshock Creek Gneiss, which is composed of the foliated granite and layered granite gneiss. Despite this redefinition, their work did not establish the Pocoshock Creek Gneiss as a formal lithodemic unit per the North American Commission on Stratigraphic Nomenclature (2021). Therefore, in order to better characterize the Pocoshock Creek Gneiss, justify its division from the Petersburg Granite (sensu stricto), and define this unit formally, geochemical data from these two units are compared. This data release comprises unpublished geochemical data collected during the work of Carter and others (2023), as well as a compilation of published geochemical data from Carter and others (2023) and from various igneous intrusions throughout the southern Appalachians for comparison with the Petersburg Granite (sensu stricto) and Pocoshock Creek Gneiss. The sources of all geochemical data included in this data release are described further within this metadata. Note, any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Abstract References: Bleick, H.A., Carter, M.W., and Berquist, C.R., Jr., 2011, Geologic map of the Richmond quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-File Report 2011-13, scale 1:24,000. Bloomer, R.O, 1939, Notes on the Petersburg Granite: Virginia Geological Survey, Bulletin 51-F, p. 137–145. Bobyarchick, A.R., 1978, Reconnaissance geologic setting of the Petersburg Granite and regional framework for the Piedmont in southeastern Virginia, in Costain, J.K., Glover, L. III., and Sinha, A.K., eds., Evaluation and Targeting of Geothermal Energy Resources in the Southeastern United States: Virginia Polytechnic Institute and State University Progress Report 5648–4, p. A-1–A-37. Bobyarchick, A.R., and Glover, L., III, 1979, Deformation and metamorphism in the Hylas zone and adjacent parts of the eastern Piedmont in Virginia: Geological Society of America Bulletin, v. 90, p. 739–752, https://doi.org/10.1130/0016-7606(1979)90<739:DAMITH>2.0.CO;2. Bondurant, A.K., Berquist, C.R., Jr., Carter, M.W., and Bleick, H.A., 2011, Geologic map of the Drewrys Bluff quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-File

This data release includes whole rock (WR) geochemical data for 94 samples. Whole rock geochemistry data were analyzed at Actlabs in Ancaster, Ontario, Canada. Rock samples were collected by Peter Valley, Greg Walsh, Arthur Merschat, and Ryan McAleer. The whole rock geochemistry data characterize the composition of mapped meta-igneous rocks in eastern Vermont and western New Hampshire, USA. The data release contains three files, including one metadata file and 2 comma-delimited (CSV) files. The CSV files include the following: BronsonHill_WR_data.csv and BronsonHill_WR_data_dictionary.csv.

This data release includes whole rock (WR) geochemical data for 94 samples. Whole rock geochemistry data were analyzed at Actlabs in Ancaster, Ontario, Canada. Rock samples were collected by Peter Valley, Greg Walsh, Arthur Merschat, and Ryan McAleer. The whole rock geochemistry data characterize the composition of mapped meta-igneous rocks in eastern Vermont and western New Hampshire, USA. The data release contains three files, including one metadata file and 2 comma-delimited (CSV) files. The CSV files include the following: BronsonHill_WR_data.csv and BronsonHill_WR_data_dictionary.csv.

This dataset provides geochronologic and geochemical data for selected metasedimentary and associated rock samples collected in the Lane Mountain area about 20 kilometers northeast of Barstow, California. Geochronologic data were obtained for 24 samples, and geochemical data were obtained for 5 of these. The dataset consists of four tables in comma separated values (CSV) format: (1) sample localities and lithology; (2) LA-SF-ICPMS (Laser Ablation Sector Field Inductively Coupled Plasma Mass Spectrometry) U-Pb (uranium-lead) zircon geochronologic data; (3) SHRIMP-RG (Sensitive High-Resolution Ion Microprobe-Reverse Geometry) U-Pb zircon geochronologic data; and (4) whole-rock geochemical data determined by ICP-AES-MS (Inductively Coupled Plasma Atomic Emission Spectroscopy-Mass Spectrometry) and WDXRF (Wavelength Dispersive X-ray Fluorescence).

This dataset provides geochronologic and geochemical data for selected metasedimentary and associated rock samples collected in the Lane Mountain area about 20 kilometers northeast of Barstow, California. Geochronologic data were obtained for 24 samples, and geochemical data were obtained for 5 of these. The dataset consists of four tables in comma separated values (CSV) format: (1) sample localities and lithology; (2) LA-SF-ICPMS (Laser Ablation Sector Field Inductively Coupled Plasma Mass Spectrometry) U-Pb (uranium-lead) zircon geochronologic data; (3) SHRIMP-RG (Sensitive High-Resolution Ion Microprobe-Reverse Geometry) U-Pb zircon geochronologic data; and (4) whole-rock geochemical data determined by ICP-AES-MS (Inductively Coupled Plasma Atomic Emission Spectroscopy-Mass Spectrometry) and WDXRF (Wavelength Dispersive X-ray Fluorescence).

This data release contains geochemical data, thin section images, and modal mineralogy from bedrock samples collected in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina. The geochemical data comprise whole-rock major oxide and trace element abundances in 246 samples. Pairs of thin section images in plane-polarized light and cross-polarized light are included for 125 samples. Modal mineralogy was obtained by powder X-ray diffraction and the Rietveld method for 97 samples.

This data release includes whole rock (WR) and portable X-ray fluorescence (pXRF) geochemical data collected from the eastern Adirondack Mountains, NY. Whole rock geochemistry data were analyzed at Bureau Veritas Commodities Canada Ltd. Laboratories in Vancouver, British Columbia, Canada. Data were collected using a Thermo Niton portable X-ray fluorescence (XRF) spectrometer. Rock samples for all methods were collected by Kaitlyn Suarez, Daniel Tjapkes, and Greg Walsh. The data release contains five files, including one metadata file and four comma-delimited (CSV) files. The CSV files include the following: EasternAdirondacks_WR_data_.csv, EasternAdirondacks_WR_data_dictionary.csv, EasternAdirondacks_pXRF_data.csv, and EasternAdirondacks_pXRF_data_dictonary.csv.

This data release includes whole rock (WR) and portable X-ray fluorescence (pXRF) geochemical data collected from the eastern Adirondack Mountains, NY. Whole rock geochemistry data were analyzed at Bureau Veritas Commodities Canada Ltd. Laboratories in Vancouver, British Columbia, Canada. Data were collected using a Thermo Niton portable X-ray fluorescence (XRF) spectrometer. Rock samples for all methods were collected by Kaitlyn Suarez, Daniel Tjapkes, and Greg Walsh. The data release contains five files, including one metadata file and four comma-delimited (CSV) files. The CSV files include the following: EasternAdirondacks_WR_data_.csv, EasternAdirondacks_WR_data_dictionary.csv, EasternAdirondacks_pXRF_data.csv, and EasternAdirondacks_pXRF_data_dictonary.csv.

This data release includes whole rock geochemical data, and uranium-lead isotopic data collected by both Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) and Sensitive High Resolution Ion Microprobe-Reverse Geometry (SHRIMP-RG) methods. Whole rock geochemistry was collected by Activation Laboratories in Ancaster, Ontario. LA-ICP-MS data was collected at the PLASMA at the USGS in Denver, Colorado. SHRIMP-RG data was collected at the USGS-Stanford SHRIMP-RG in Palo Alto, California. Rock samples for all methods were collected by Mark Carter of the USGS. The whole rock geochemistry and uranium lead isotopic data constrain the age and origin of rocks in the newly defined Dinwiddie Terrane of eastern Virginia.

This data release includes whole rock geochemical data, and uranium-lead isotopic data collected by both Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) and Sensitive High Resolution Ion Microprobe-Reverse Geometry (SHRIMP-RG) methods. Whole rock geochemistry was collected by Activation Laboratories in Ancaster, Ontario. LA-ICP-MS data was collected at the PLASMA at the USGS in Denver, Colorado. SHRIMP-RG data was collected at the USGS-Stanford SHRIMP-RG in Palo Alto, California. Rock samples for all methods were collected by Mark Carter of the USGS. The whole rock geochemistry and uranium lead isotopic data constrain the age and origin of rocks in the newly defined Dinwiddie Terrane of eastern Virginia.