here is some reading that might answer why PUR is reluctant to...

here is some reading that might answer why PUR is reluctant to release pXRF. I don't believe there is any intention to hide the pXRF results but maybe a desire to avoid unnecessary headaches. As @Alphaman says, PUR were using the pXRF to determine core sample suitable for expedited assaying and there is no obligation to report the results. However, if they chose to, then the Company ( the Competent Person) is bound by the JORC code and then a whole bunch of public release complexities come into play to main compliance against which were once the domain of the independent laboratory.

Sampling and Analysis for Public Reporting of Portable X-ray
Fluorescence Data Under the 2012
Edition of the JORC Code

'This responsibility lies with the Competent Person, as it always has, but the care and expertise needed to ensure the quality of pXRF data extends into the realm previously occupied by the independent laboratory. The Competent Person need only maintain a monitoring role on data quality through the use of an independent quality assurance (QA) program, where analyses are undertaken externally by a commercial laboratory. However, where pXRF data are to be reported publicly, the onus of producing representative pXRF data of good quality falls squarely on the shoulders of the Competent Person reporting the data. This extension of the definition of competence into the analytical realm has no doubt caught some geologists unprepared, as evidenced by the occasional public dissemination of pXRF results that are at the very least erroneous and at the worst
intentionally misleading.
.