Daniel E. Heaton
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View article: 40Ar/39Ar dating reveals over 30 million years of plume-ridge interaction formed the Rio Grande Rise
40Ar/39Ar dating reveals over 30 million years of plume-ridge interaction formed the Rio Grande Rise Open
The Rio Grande Rise (RGR) oceanic plateau exhibits distinctly broad morphology compared to the linear, age-progressive Walvis Ridge (WR), despite both originating from the Tristan-Gough (T-G) plume. New 40Ar/39Ar ages (84–41 Ma) from RGR d…
View article: Eruption, Emplacement and Internal Architecture of Massive and Super‐Massive Inflated Submarine Basalt Lava Flows, Walvis Ridge Hotspot Track, IODP Expeditions 391/397T
Eruption, Emplacement and Internal Architecture of Massive and Super‐Massive Inflated Submarine Basalt Lava Flows, Walvis Ridge Hotspot Track, IODP Expeditions 391/397T Open
Massive submarine basalt flows were sampled at five sites on the Tristan‐Gough‐Walvis hotspot track in the South Atlantic by International Oceanic Discovery Program Expeditions 391/397T, where the plume was interacting with a mid‐ocean rid…
View article: The FUTURE of the US Marine Seafloor and Subseafloor Sampling Capabilities
The FUTURE of the US Marine Seafloor and Subseafloor Sampling Capabilities Open
Recent changes in US oceanographic assets are impacting scientists' ability to access seafloor and sub‐seafloor materials and thus constraining progress on science critical for societal needs. Here we identify national infrastructure needs…
View article: Paleointensity determinations on late Cretaceous – early Paleocene basalts from Walvis Ridge (IODP Exp. 391 and 397T)
Paleointensity determinations on late Cretaceous – early Paleocene basalts from Walvis Ridge (IODP Exp. 391 and 397T) Open
A good knowledge of the long-term variations of geomagnetic paleofield intensity is essential for a complete description of the field history. However, we lack a complete description of the geomagnetic field over many time scales, especial…
View article: Awakening of Maunaloa Linked to Melt Shared from Kīlauea’s Mantle Source
Awakening of Maunaloa Linked to Melt Shared from Kīlauea’s Mantle Source Open
Maunaloa—the largest active volcano on Earth—erupted in 2022 after its longest known repose period (~38 years) and two decades of volcanic unrest. This eruptive hiatus at Maunaloa encompasses most of the ~35-year-long Puʻuʻōʻō eruption of …
View article: Preliminary Characterization of Submarine Basalt Magnetic Mineralogy Using Amplitude‐Dependence of Magnetic Susceptibility
Preliminary Characterization of Submarine Basalt Magnetic Mineralogy Using Amplitude‐Dependence of Magnetic Susceptibility Open
The past ∼200 million years of Earth's geomagnetic field behavior have been recorded within oceanic basalts, many of which are only accessible via scientific ocean drilling. Obtaining the best possible paleomagnetic measurements from such …
View article: IODP Expedition 397T Elemental analysis (CHNS)
IODP Expedition 397T Elemental analysis (CHNS) Open
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 rea…
View article: IODP Expedition 397T Section summary
IODP Expedition 397T Section summary Open
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.
View article: IODP Expedition 397T ICP-AES elemental analysis (solids)
IODP Expedition 397T ICP-AES elemental analysis (solids) Open
Elemental contents in hard rock and sediment samples was measured by inductively coupled plasma - atomic emission spectrocopy (ICP-AES). Data are presented by element-wavelength pair (e.g., more than one calcium line may be reported). Elem…
View article: IODP Expedition 397T RGB channels (calculated from core photos)
IODP Expedition 397T RGB channels (calculated from core photos) Open
Red, green, and blue pixel data were extracted from Section Half Imaging Logger (SHIL) linescan images, typically binned at 0.5 cm resolution using the central 2 cm of the image.
View article: IODP Expedition 397T Closeup images
IODP Expedition 397T Closeup images Open
Close-up images taken by digital cameras as requested by the science party, typically when the section-half image is not sufficient. Close-up photographs of the areas of interest may be taken from whole-round sections, pieces, or section h…
View article: IODP Expedition 397T Carbonates composite report
IODP Expedition 397T Carbonates composite report Open
This composite report includes data from two analyses (total carbon from Elemental analysis [CHNS], and inorganic carbon from [Coulometer]). Each row combines the CHNS and Coulometer data from measurements made on the same sample at the sa…
View article: IODP Expedition 397T Hole summary
IODP Expedition 397T Hole summary Open
Report lists hole data: location, water depth, drilling, coring system, and core recovery.
View article: IODP Expedition 397T Whole-round core section images
IODP Expedition 397T Whole-round core section images Open
Images of the outside of hard rock whole-round sections were acquired using a linescan imager (Section Half Imaging Logger [SHIL]) and a special holder that allows each 90 degree segment of the outer surface to be positioned properly. The …
View article: IODP Expedition 397T Whole-round core section composite 360 degree images
IODP Expedition 397T Whole-round core section composite 360 degree images Open
Images of the outside of hard rock whole-round sections were acquired using a linescan imager (Section Half Imaging Logger [SHIL]) and a special holder that allows each 90 degree segment of the outer surface to be positioned properly. The …
View article: IODP Expedition 397T Color reflectance
IODP Expedition 397T Color reflectance Open
Color reflectance data were measured on section halves using an integration sphere and a UV-VIS spectrophotometer mounted on the Section Half Multisensor Logger (SHMSL). Spectral counts are recorded in the range of 380 to 700 nm, covering …
View article: IODP Expedition 397T P-wave velocity caliper (section/discrete)
IODP Expedition 397T P-wave velocity caliper (section/discrete) Open
P-wave velocity data were measured on undisturbed section halves (JRSO-defined x-axis) and/or discrete cube and cylinder samples (x, y, or z-axis) using pairs of piezoelectric transducers mounted on a caliper system. Report includes P-wave…
View article: IODP Expedition 397T Visual core description
IODP Expedition 397T Visual core description Open
Descriptions of samples, generally at the section half and smear slide or thin section scale, were performed by shipboard scientists and recorded in the JRSO description software. Descriptive data for both macroscopic and microscopic exami…
View article: IODP Expedition 397T Rig instrumentation
IODP Expedition 397T Rig instrumentation Open
Operational rig information data were measured using a variety of sensors and compiled using the RigWatch software package. Approximately 50 channels of drilling/coring data are captured in real time during the expedition. Data are present…
View article: IODP Expedition 397T Section-half images
IODP Expedition 397T Section-half images Open
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…
View article: IODP Expedition 397T Bulk Density (GRA)
IODP Expedition 397T Bulk Density (GRA) Open
Gamma ray attenuation (GRA) data were acquired using a Cs-137 collimated source and a sodium iodide (thallium), or NaI(Tl), scintillation detector. The signal was calibrated using water and aluminum standards to provide a proxy for bulk de…
View article: IODP Expedition 397T Magnetic susceptibility (whole round)
IODP Expedition 397T Magnetic susceptibility (whole round) Open
Magnetic susceptibility was measured on whole-round sections (and rarely section halves) on the Whole-Round Multisensor Logger (WRMSL) and/or Special Task Multisensor Logger (STMSL) using a Bartington MS2 meter and a 90 mm or 80 mm MS2C lo…
View article: IODP Expedition 397T Elemental analysis (CHNS)
IODP Expedition 397T Elemental analysis (CHNS) Open
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 rea…
View article: IODP Expedition 397T Hole drilling summary
IODP Expedition 397T Hole drilling summary Open
Report includes detailed drilling data: BHA length, bit parameters, and primary depth measurements.
View article: IODP Expedition 397T Core summary
IODP Expedition 397T Core summary Open
Report includes detailed core data: drilling and coring depths, advancement, recovered core length measured on the catwalk and final curated length, core recovery, and sections cut.
View article: IODP Expedition 397T Whole-round core section composite 360 degree images
IODP Expedition 397T Whole-round core section composite 360 degree images Open
Images of the outside of hard rock whole-round sections were acquired using a linescan imager (Section Half Imaging Logger [SHIL]) and a special holder that allows each 90 degree segment of the outer surface to be positioned properly. The …
View article: IODP Expedition 397T Photomicrographs
IODP Expedition 397T Photomicrographs Open
Microscopic images of discrete samples were acquired using stereo and upright light microscopes and captured on digital cameras. Image files were uploaded along with a brief description and a record of the microscopic and lighting conditio…
View article: IODP Expedition 397T Moisture and Density
IODP Expedition 397T Moisture and Density Open
Moisture and density (MAD) data were acquired on ~10 mL sediment or rock samples by measuring three out of four material parameters: wet (saturated) mass, wet volume, dry mass, and/or dry volume after 24 h drying in a convection oven at 10…
View article: IODP Expedition 397T Core summary
IODP Expedition 397T Core summary Open
Report includes detailed core data: drilling and coring depths, advancement, recovered core length measured on the catwalk and final curated length, core recovery, and sections cut.