Rajneesh Bhutani

Pondicherry University

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Mike Widdowson

University of Hull

170

Mbili Tshiningayamwe

University of Namibia

169

Claire Carvallo

Institut de minéralogie, de physique des matériaux et de cosmochimie

169

William W. Sager

University of Houston

169

Wendy R. Nelson

Towson University

167

Arianna V. Del Gaudio

University of Graz

166

Katherine E. Potter

Massachusetts Institute of Technology

166

Giacomo Dalla Valle

Institute of Marine Science

166

Ethan Petrou

University of Oxford

166

Stephan Homrighausen

GEOMAR Helmholtz Centre for Ocean Research Kiel

166

Cooperative Institutions

Pondicherry University

Physical Research Laboratory

Geological Survey of India

National Geophysical Research Institute

National Centre for Earth Science Studies

International Ocean Discovery Program

Rashtrasant Tukadoji Maharaj Nagpur University

Chinese Academy of Sciences

Academy of Scientific and Innovative Research

Council of Scientific and Industrial Research

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IODP Expedition 391 Core drilling summary

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Kaj Hoernle Tobias W. Höfig Aaron J. Avery Rajneesh Bhutani

Report includes detailed drilling data for each core: pump(s) used, mud pumped, strokes, shear pins/pressure, bit size/rotation, weight on bit, top drive torque, rate of penetration, core jams, winch and wirelines, core catcher/shoe and barrel, and whether core orientation, drillover, formation temperature, tracers, liners were used.

10.5281/zenodo.10206381

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Geochronological and geochemical constraints on the petrogenesis of alkali granites from the Makrohar Granulite Belt: Evidence for Mesoproterozoic extensional regime in the eastern Central Indian Shield

Geological Journal (2022)

B. S. Yadav Talat Ahmad Rajneesh Bhutani Т. В. Каулина T. B. Bayanova

The Chotanagpur Gneissic Complex (CGC) is characterized by the Makrohar Granulite Belt (MGB) at its north‐western margin parallel to Son‐Narmada lineaments. The MGB exhibits a typical association of mantle‐derived mafic tholeiitic and alkaline rocks along with the felsic units. The zircon U–Pb data on the intrusive granite gneiss from this association define a crystallization age of 1,498 ± 38 Ma, representing a widespread Mesoproterozoic within‐plate magmatic event in CGC synchronous with the breakup of the Columbia Supercontinent. These granite gneisses have an alkaline affinity and are metaluminous in character. They exhibit many of the geochemical characteristics of anorogenic (A‐type) magmas, including enrichment of incompatible trace elements, like Zr, Hf, Nb, Y, Ga, and rare earth elements (REE), but low in Ba and Sr as well as high FeO t /(FeO t + MgO) (~0.98) values and Ga/Al (~3.92) ratios. They show less fractionated REE patterns, characterized by relatively enriched LREE and flat HREE with negative Eu anomaly, and have high Zr‐saturation temperatures (~955°C). Considering their field characteristics and all the geochemical and isotopic features, we conclude that they were derived from melting the lower crust metasomatized by mantle‐derived alkali‐rich fluids due to asthenospheric upwelling.

Petrogenesis

Supercontinent

Underplating

Felsic

Primitive mantle

10.1002/gj.4611

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IODP Expedition 391 Alkalinity and pH

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Kaj Hoernle Tobias W. Höfig Aaron J. Avery Rajneesh Bhutani

Alkalinity was determined by Gran titration with an autotitrator (Metrohm 794 basic Titrino) using 0.1 M HCl at 20 degrees C. Report includes alkalinity, correction factor (if applicable), and pH.

Alkalinity

10.5281/zenodo.10206226

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IODP Expedition 391 Vane shear strength (AVS)

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Kaj Hoernle Tobias W. Höfig Aaron J. Avery Rajneesh Bhutani

Shear strength was measured on section halves using a GEISA automated vane shear (AVS) frame and device controller. The device is suitable for sediment not affected by cementation (i.e., saturated, clay-rich, soft sediment). Shear strength measurements should be considered only approximate, particularly because the influence of pore pressure changes during the undrained experiment cannot be estimated. Report includes vane shear strength at the sample's failure point, maximum torque angle, penetration direction, and rate of vane rotation.

10.5281/zenodo.10206365

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IODP Expedition 391 Section-half images

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Kaj Hoernle Tobias W. Höfig Aaron J. Avery Rajneesh Bhutani

Digital section images were taken of the flat face of split cores on the Section Half Imaging Logger (SHIL) using a linescan camera at a resolution of 20 lines/mm (50 micron pixels). Cores were imaged as soon as possible after splitting to minimize color changes that occur through oxidation and drying. The SHIL produces TIF files as well as reduced-size JPG files. The TIF files are not kept online but users may request them from the IODP-JRSO Data Librarian.

Section (typography)

10.5281/zenodo.10206299

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IODP Expedition 391 P-wave velocity logger (whole round)

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Kaj Hoernle Tobias W. Höfig Aaron J. Avery Rajneesh Bhutani

P-wave velocity data were measured on whole-round sections on the Whole-Round Multisensor Logger (WRMSL) using pairs of piezoelectric transducers mounted on a caliper system. Measurements may be affected by degassing of pore fluid and microfracturing during core recovery. Report includes P-wave velocity in x-y plane and distance and traveltime between transducers.

Data logger

10.5281/zenodo.10206430

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IODP Expedition 397T Elemental analysis (CHNS)

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Peter Blum Claire Carvallo Daniel E. Heaton Wendy R. Nelson

Fundamental elemental component (total carbon, hydrogen, nitrogen, and sulfur) fluctuations help define the origin, depositional environment, and diagenetic alteration of source materials. To determine C, H, N, and S, solid samples are reacted with a catalyst, separated by chromatography, and detected by thermal conductivity on a FlashEA 1112 CHNS elemental analyzer. Organic carbon can be directly measured on the elemental analyzer by acidification of the sample to drive off carbonate as carbon dioxide before analyzing. Total organic carbon on this report is measured rather than calculated.

10.5281/zenodo.10210649

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IODP Expedition 391 X-ray diffraction (XRD)

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Kaj Hoernle Tobias W. Höfig Aaron J. Avery Rajneesh Bhutani

X-ray diffraction (XRD) is used to identify minerals and their proportions in sediment or hard rock sample powders on a Bruker AXS D4 Endeavor X-ray diffractometer. Results are returned as diffractograms in a viewable format (either PDF or PNG).

10.5281/zenodo.10206453

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IODP Expedition 391 Thermal conductivity

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Kaj Hoernle Tobias W. Höfig Aaron J. Avery Rajneesh Bhutani

Thermal conductivity was measured using the heated needle method in either full-space needle configuration (soft/saturated sediments) or half-space needle configuration (harder materials) of a TeKa Berlin TK-04 thermal conductivity meter. Heat is applied to the sample and then thermal equilibrium is sought. The heating and equilibration curve is reduced to derive the thermal conductivity value. Raw data are stored if a user wishes to do off-line or postexpedition reduction.

10.5281/zenodo.10206450

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IODP Expedition 397T Section summary

Zenodo (CERN European Organization for Nuclear Research) (2023)

William W. Sager Peter Blum Claire Carvallo Daniel E. Heaton Wendy R. Nelson

Report includes data for individual core sections: coring/drilling depths and recovery, database identifiers for the whole section and section halves, and number of samples taken from the section before and after splitting.

Section (typography)

10.5281/zenodo.10210970

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