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Paleomagnetic standards (IODPSTD01 through IODPSTD12) were provided by Lisa Tauxe to confirm instrument measurements are correct. The standards were prepared specifically for the SRM. Do not measure them in the JR-6 spinner. These standards were prepared and measured at Sripps Scripps Institute for Oceanography in California. Standards are kept in a cardboard box (figure Figure 1) and stored in the Pmag lab in the smaller MU metal shielding chamber (figure Figure 2).
Figure 1 Paleomagnetic Standards Figure 2 Standards Location
Table 1 contains the values of the standards as they were measured in California before receipt by IODP. Note that the units of intensity in the provided values was in emu and the volume used was 1cc. Intensity has been converted to A/m as this is the unit used by IODP instruments and the intensity has also been listed if you assume a 7cc volume.. The conversion used was 10-1 A/m = 10-3 emu. It is extremely important that these standards do not get demagnetized. Be sure to stress this to anyone who may use the standards.
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Because the standards provided by Lisa Tauxe at Scripps were not designed to be used in the JR-6, 4 new standards were created which can be used in the JR-6. A strip of magnetic tape was glued to a stick which is secured inside a J-cube. The standards were then given an IRM and measured in the JR-6 followed by the SRM. These standards are oriented as if they were collected from a working half with an assumed volume of 7cc . Each standard was measured 20 times. The process included inserting and removing the standard between each measurement. The mean intensity was calculated as well as fischer Fischer stats for inclination and declination. See table below.
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