Services Available in the Repository
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In addition to sampling cores for researchers unable to visit Lamont for their own sampling, the Deep-Sea Sample Repository and the Physical Properties Lab together are equipped to provide many other services. There are several instruments for conducting and/or assisting with analyses of deep-sea sediments such as a Multi-Sensor Core Logger, Coulometer, Sedigraph, Vane Shear, X-radiograph, Sonic Sifter, freeze dryer, as well as a variety of microscopes, sieves, sampling tools and all traditional sediment lab supplies. See below for details.
Archival services are available for non-NSF collected cores under the provision that they be made available to the research community upon completion of the original project. In addition, individual units of the archival process (i.e., splitting, photography, etc.) can be provided for non-archived cores on a per-project cost basis. Please inquire regarding any procedures not listed as we are willing to work out a system to help you and your project if at all possible. Contact the Curator for specifics and for analytical fees. See below for additional information.
Sub-sampling Facilities (analyzing and sampling)
- A Radiflor 360 X-Ray Inspection System produces x-ray images for non-destructive viewing of cores in a film negative format.
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- Several geophysical measurements, also non-destructive can be made with a GEOTEK Multi-Sensor Core Logger. Our multisensor tract includes a gamma-ray attenuation porosity evaluator (GRAPE) and compressional wave (P-wave) logger devices which measure bulk density, porosity, and sonic velocity, and magnetic susceptibility.
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- Digitized images of cores using a GEOSCAN II linescan camera linked to the Multi-Sensor Core Logger core conveyor. Three individual filters produce RGB Color spectra and profile data.
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- Shear vane (sediment shear strength).
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- High resolution sampling. Lamont has developed systems for high resolution sampling of wet and dry sediment cores. Our sampling tools are capable of collecting narrow intervals of sediment, avoiding known burrows. The goal is two-fold -- high quality data and preservation of sediment for future work.
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- An L3P Sonic Sifter for the rapid separation of a wide variety of dry particles and powders in the fine micron range.
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- Please inquire regarding any procedures not listed as we are willing to work out a system to help you and your project if at all possible.
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Sample Preparation for Archiving
Cores are initially prepared by cutting them into 1.5 m (approximately five feet) lengths and then split longitudinally. Intervals are permanently marked with non-corrosive, non-reactive markers every 10 cm in both working and archive halves of the core. The split cores are photographed in color using a digital camera. They can also be photographed in black and white, or in color using a Pentax K1000 36 mm SRL camera. Film is T-MAX 100 and VPS-135 color film. Information on sediment is logged by interval for lithology; mass properties such as texture, color; structure such as bedding, burrows; composition including carbonate content; paleontology and mineralogy; and nature of basal contact to next interval. The split cores are placed in D-tubes for refrigerated storage.
For more information, contact Rusty Lotti Bond
(curator@ldeo.columbia.edu). Comments are welcomed. Last update of this page was February 17, 2003.
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