cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5281/zenodo.15626976
title: Molecular (C1-C5 hydrocarbon, CO2, O2, and N2) and δ13C-CH4 composition of pressure core, void, and hydrate gases from the Terrebonne Basin, Gulf of America (Gulf of Mexico), Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset contains the gas composition and isotope data from void, hydrate dissociation, and quantitative degassing samples. Void gases were extracted using a stainless-steel puncture sampler that was pushed through the core liner shortly after the core was collected onboard the Helix Q4000.  Where solid hydrate or hydrate-bearing sediment was encountered in cryogenically frozen and depressurized samples, dissociated gas was then transferred to a Cali-5 Bond gas bag. Syringes and gas bag samples were collected from the top of the bubbling chamber of the quantitative degassing apparatus. Samples were analyzed for gas composition (C1-C5 hydrocarbons, CO2, O2, and N2) and methane δ13C isotopes at the U.S. Geological Survey Woods Hole Coastal and Marine Science Center using the Automated Sample Introduction Module (Auto-SIM) Gas Chromatography/Cavity Ring-Down Spectroscopy System (Auto-SIM GC/CRDS). See Expedition UT-GOM2-2 Methods: Gas Geochemistry (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228)

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

The attached readme file, previewed below, describes the data file in this dataset and its contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

The sample depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx. See tab “Sample-measurement log” sample code “VG” for void gas samples. See tab “Section-piece log” core processing code “QD” for quantitative degassing gas samples (also see the quantitative degassing dataset: https://doi.org/10.5281/zenodo.14775236). See tab “Section-piece log” sample code “CRYO, HYD” for dissociated gas from hydrate samples.

Gas composition of headspace gas samples can be found in the Headspace Gas Geochemistry dataset (https://doi.org/10.5281/zenodo.14518633).

Gas composition of additional void samples using an Inficon Fusion MicroGC chromatograph can be found in the void gas geochemistry dataset (https://doi.org/10.5281/zenodo.16689630).
DOI: 10.5281/zenodo.14277996
title: Multi-sensor core logs of split core sections from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset includes magnetic susceptibility, color reflectance spectroscopy, and X-ray fluorescence measurements of conventional and conventionalized whole round cores using the Geotek Multi-Sensor Core Logger for slit core surface measurements (MSCL-XZ). See Expedition UT-GOM2-2 Methods: Split Core Logging and Imaging (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

The whole round section-piece depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download file UT-GOM2-2 CORE LOG depths – sortable, see tab “Section-piece log”, core processing code “Conv.” for all conventional and conventionalized core, “QD” for quantitatively degassed pressure core, and “CRYO” for cryogenically frozen and depressurized pressure core sections. All these sections have split core logging data.

A summary of all logging and imaging for each core and section type can be found in the core images dataset http://doi.org/10.5281/zenodo.14261688. Linescan images can also be found in the core images dataset http://doi.org/10.5281/zenodo.14261688.
DOI: 10.5281/zenodo.14518383
title: Multi-sensor core logs of conventional core sections from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset includes natural gamma radiation, gamma density, magnetic susceptibility, electrical resistivity, and a few P-wave velocity measurements of conventional core whole round sections from the Geotek standard Multi-Sensor Core Logger (MSCL-S). These core logs were measured on whole round core sections collected with the Geotek Advanced Piston Corer and Geotek Extended Core Barrel coring tools. For more details, see Expedition UT-GOM2-2 Methods: Conventional Whole Core Logging and Imaging (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes the data file in this dataset and its contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

Whole round section-piece depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, core type “H” for Geotek Advanced Piston Corer (G-APC) and “X” for Geotek Extended Core Barrel (G-XCB).

A summary of all logging and imaging for each core and section type can be found in the core images dataset http://doi.org/10.5281/zenodo.14261688. IR images, X-ray radiographs, computed tomography data and images can also be found in the core images dataset http://doi.org/10.5281/zenodo.14261688. Split core logging of archived halves can be found in the split core logging dataset http://doi.org/10.5281/zenodo.14277995 and linescan images of archived halves can be found in the core images dataset http://doi.org/10.5281/zenodo.14261688.

Processed conventional whole core logging data can be found in Appendix F, of Expedition UT-GOM2-2 Site H (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276).
DOI: 10.5281/zenodo.14518409
title: Gamma ray attenuation density and P-wave velocity of pressure cores from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset includes gamma ray attenuation density and P-wave velocity measurements of pressure cores from the Pressure Core Analysis and Transfer System (PCATS). See Expedition UT-GOM2-2 Methods: Pressure Core Logging and Imaging (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes the data file in this dataset and its contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

The sample depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx. See tab “Core log”, Core type “FB” for the Pressure Coring Tool with Ball valve (PCTB) in the face bit configuration (PCTB-FB), and “CS” for the PCTB in the cutting shoe configuration (PCTB-CS) AND Core Process “PC” for pressure core processing.

A summary of all logging and imaging for each core and section type can be found in the core images dataset http://doi.org/10.5281/zenodo.14261688. X-ray and CT images of pressure core, and X-ray and CT of whole round quantitatively degassed sections can also be found in the core images dataset http://doi.org/10.5281/zenodo.14261688. Quantitatively degassed sections were measured manually for whole round magnetic susceptibility and then imaged and logged for point magnetic susceptibility and X-ray fluorescence after splitting. Magnetic susceptibility for quantitatively degassed sections can be found in the conventionalized pressure core logs (http://doi.org/10.5281/zenodo.14518437). Split core logging of quantitatively degassed sections can be found in the split core logging dataset http://doi.org/10.5281/zenodo.14277995 and visible images for split quantitatively degassed sections can be found in the core images dataset http://doi.org/10.5281/zenodo.14261688.

Processed conventionalized pressure core whole core logging data can also be found in Appendix E, of Expedition UT-GOM2-2 Site H (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276).
DOI: 10.5281/zenodo.14055308
title: Dataset degli eventi sismici localizzati entro il Dominio Esteso dell'UGS Collalto dal 1.1.2012 al 31.3.2023.

description: Il file Collalto-DE_OGScatalog2012-2023.3.xml è un prodotto realizzato nell'ambito PNRR (*) Geosciences IR coordinato da ISPRA, Action 4.3c OU 41 OGS03 Referente Laura Peruzza.

Trattasi di un dataset di localizzazioni ipocentrali di elevata qualità per eventi sismici di bassa magnitudo (Mlmin=-0.8, Mlmax=3.7) avvenuti dal 1.1.2012 al 31.3.2023 entro il cosiddetto Dominio Esteso del serbatoio di stoccaggio di gas metano (Underground Gas Storage - UGS) della concessione "Collalto Stoccaggio" (operata da Edison Stoccaggio dal 16.6.1994; dati da webgis UNMIG, https://unmig.mase.gov.it/webgis-unmig/).  

Gli eventi sismici sono identificati e localizzati grazie alla Rete Sismica di Collalto (http://rete-collalto.crs.inogs.it/it; Priolo et al., 2015), progettata, realizzata e gestita dall'Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS, Centro di Ricerche Sismologiche (https://www.ogs.it/it/centro-di-ricerche-sismologiche). 

La localizzazione degli eventi rilevati dalla Rete Sismica di Collalto è stata fatta adottando la procedura ottimizzata descritta in Romano et al. (2019).

Per la definizione del Dominio Esteso si rinvia agli "Indirizzi e linee guida per il monitoraggio delle attività di sottosuolo (ILG)" (https://unmig.mase.gov.it/geomonitoraggi/linee-guida-per-i-monitoraggi/); si specifica che la selezione degli eventi ricadenti entro il poligono del Dominio Esteso (DE) che inviluppa il serbatoio a 13 km di distanza dal suo perimetro è stata effettuata sulle sole coordinate epicentrali (latitudine, longitudine) senza considerare la profondità, non essendoci in questa regione una significativa presenza di terremoti profondi.

Il dataset, fornito in formato QuakeML v.1.2, è stato verificato in lettura con libreria obspy (1.4.0). 

Per ciascuno dei 1528 terremoti sono riportate le informazioni di sintesi (tempo origine, localizzazione ed errori, magnitudo dell'evento), i dati di base (tempi di arrivo disponibili per le fasi P e S alle varie stazioni con relativa incertezza, magnitudo di stazione) e degli identificativi della procedura di localizzazione usata. 

Questo dataset rappresenta una rielaborazione e selezione del contenuto banca dati della Rete Sismica di Collalto, che viene periodicamente aggiornata, citabile come:Romano M.A., Guidarelli M., Santulin M., Bernardi P, Diez E., Franceschinel F., Garbin M., Klin P., Laurenzano G., Moratto L., Peruzza L., Pettenati F., Plasencia M., Priolo E., Rebez A., Romanelli M., Sandron D., Saraò A., Tamaro A. (2023) Collalto Seismic Network - Event List. Open-file, available on http://rete-collalto.crs.inogs.it/DATI/Localizzazioni/H71/fri/eventi-sismici-full-period.txt

(*) Progetto finanziato dal Piano Nazionale di Ripresa e Resilienza – PNRR Missione 4, “Istruzione e Ricerca” – Componente 2, “Dalla ricerca all’impresa” – Linea di investimento 3.1, “Fondo per la realizzazione di un sistema integrato di infrastrutture di ricerca e innovazione”.
DOI: 10.5281/zenodo.14146528
title: Salinity, alkalinity and sampling of pore water from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset contains sample preservation, salinity, and alkalinity of pore water (interstitial waters) squeezed from whole round coring (sample codes IWR and IWO) using a hydraulic press. Salinity was determined using a Reichert temperature-compensated handheld refractometer. The refractometer was calibrated using International Association for the Physical Sciences of the Oceans (IAPSO) standard seawater. Alkalinity was determined by Gran titration with 0.1 N trace metal grade HCl following the procedure described in Gieskes et al. (1991).  Measured values were not corrected for contamination.  Contamination control samples were collected. Salinity and alkalinity measurements will be corrected for contamination in the future. See Expedition UT-GOM2-2 Methods: Pore Water Geochemistry (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

The whole round sample depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, sample code “IWR” for regular pore water/ interstitial waters whole rounds, and sample code “IWO” for organic pore water/ interstitial waters whole rounds.
DOI: 10.5281/zenodo.14104225
title: Pressure Coring in the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset contains pressure coring data from Pressure Coring Tool with Ball Valve (PCTB) deployments including rig data, wireline data, data storage tag data, PCTB settings, recovery pressures, and sediment recovery. Both configurations of the PCTB were used: the face bit (code FB) and cutting shoe (code CS). Timestamped rig and wireline data including rates of penetration, pump rates, wireline depth and tension were plotted with timestamped temperature and pressure data from data storage tags inside the pressure coring tool and on the wireline. These figures along with PCTB settings and traditional coring parameters like % recovery were used to assess the performance of the pressure coring tool. See Expedition UT-GOM2-2 Methods: Downhole Tools and Pressure Coring Results (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

Conventional coring deployment data can be found in the pressure coring dataset (https://doi.org/10.5281/zenodo.14518080).

Logs of coring data and acquired cores can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). For coring logs, download the files GoM2-2 H003 AS DRILLED.pdf and GoM2-2 H002 AS DRILLED v1.pdf.  For the core log, download file UT-GOM2-2 CORE LOG depths – sortable.xlsx. See tabs “Core log”, core type “FB” for the Pressure Coring Tool with Ball valve (PCTB) in the face bit configuration (PCTB-FB), and “CS” for the PCTB in the cutting shoe configuration (PCTB-CS).

Raw rig and wireline data can be found in the rig operations dataset (http://doi.org/10.5281/zenodo.14680104).

This data is documented in Expedition UT-GOM2-2 Site H, Pressure Coring (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276). Processed data can also be found in Appendix C, of Expedition UT-GOM2-2 Site H (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276).
DOI: 10.5281/zenodo.14146050
title: Elemental analysis (Total C, Total Org. C, Total N, Total S, and CaCO3*) of bulk sediment from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset contains total carbon, total organic carbon, total nitrogen, total sulfur, and calcium carbonate* elemental analysis data of sediment samples from whole round cores. Sample were measured at the University of New Hampshire using an Elementar Unicube CHNS elemental analyzer. See Expedition UT-GOM2-2 Methods: Sediment Geochemistry (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

All measurements presented were made on the resulting interstitial water whole round (IWR) squeeze cakes after pore water extraction.  The pore water sample depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, sample codes “IWR” for regular pore water/ interstitial waters whole rounds. Additional discrete samples were also acquired but not measured during the expedition. See tab “Sample-measurement log”, sample code “CNS”.

*Bulk sediment total inorganic carbon (TIC) was calculated by difference where TIC (total inorganic carbon) = TC-TOC).   CaCO3 weight percents were calculated by multiplying the IC weight percentages (IC = TC-TOC) by 8.33 to account for the non‑carbon mass fraction.
DOI: 10.5281/zenodo.14518634
title: Headspace gas composition (H2, H2S, C1-C6, O2, N2, CO2, Ar, and He) from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset contains gas composition data from headspace gas samples (sample code HS). Sediment plugs were collected from an exposed core cut adjacent to the standard whole round sampling set onboard the Q4000. The plugs were sealed in glass vials after being fixed with potassium chloride. Gas was extracted from the vials at The Ohio State University and analyzed for gas composition using a Thermo Fisher Trace 1310 Gas Chromatograph (GC) equipped with a thermal conductivity detector (TCD) and flame ionization detector (FID), and a Standard Research Systems (SRS) quadrupole mass spectrometer. See Expedition UT-GOM2-2 Methods: Gas Geochemistry (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes the data file in this dataset and its contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

The sample depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Sample-measurement log” sample code “HS”.

Gas composition of voids, pressure cores, and dissociated gas hydrate can be found in the USGS Gas Geochemistry dataset (https://doi.org/10.5281/zenodo.15626975).

Gas composition of additional void samples using an Inficon Fusion MicroGC chromatograph can be found in the void gas geochemistry dataset (https://doi.org/10.5281/zenodo.16689630).
DOI: 10.5281/zenodo.14171333
title: Thermal conductivity measurements of whole-round core samples from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: These data include thermal conductivity measurements (measurement code TC) on whole round core samples using a TeKa TK04 unit needle probe (Blum, 1997; Von Herzen and Maxwell, 1959). See Expedition UT-GOM2-2 Methods: Thermal Conductivity (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

The measurement depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx. See tab “Sample-measurement log”, measurement code “TC” for thermal conductivity.
DOI: 10.5281/zenodo.16929552
title: Visual core descriptions and smear slide results from the Terrebonne Basin, Walker Ridge Block 313, Site H, Expedition UT-GOM2-2

description: This dataset contains visual core descriptions and smear slide results. See Expedition UT-GOM2-2 Methods: Lithostratigraphy (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).

The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.

Additional data you might expect to find in this dataset can instead be found at the following locations:

Section depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, core processing code “Conv.” for all conventional and conventionalized core, “QD” for quantitatively degassed pressure core, and “CRYO” for cryogenically frozen and depressurized pressure core sections. All these sections were described, and the working half was sampled. Photos of cores after sampling the working halves can be found in the core image dataset (http://doi.org/10.5281/zenodo.14261688)

Smear slide sample depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Sample-measurement log”, sample code “SMS” for smear slide.

Summarized final core descriptions, including smear slide sediment names, were compiled using the software Strater. These Strater plots can be found in Appendix D, of Expedition UT-GOM2-2 Site H (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276).