b'Seismic window proceed) on the topic too commercial byHowever, breakthroughs are generallySo here is the challenge for any involving a contractor in the organisation.only achieved when data/ideas are sharedseismologists in the minerals industry:Note, other than HiSeis there is anotherand different ideas are canvassed andDont take shortcuts like the petroleum contractor - Ultramag - that is very activerespected. Innovation can only occur whengeos but work the data to come in running boutique seismic data sets forindividuals/groups question the currentup with solutions to your specific mineral explorers. way of doing things. Alas, in these days ofproblemspolitical correctness, this is often frowned My thoughts on a workshop/special sessionupon in most organisations!!?? Andwould be to invite a keynote speaker on theAnyway, I thought Id make a start this topic and build a series of presentationscoming week by contacting Richard HillisShare your ideas with the wider (mainly by invitation - not leaving it open),who I note led the DETCRC up to the time itindustry with a workshop (attached to hopefully outlining case histories, fromwas wound up in 2018. I also note Geosciencenext years AEGC)minerals company geophysicists, thatAustralia was (and will still be) very muchUpdate: I had lunch with John and he has would outline not only successes but alsoinvolved so I would not be surprised if Richardfollowed up with Richard Hillis and asked the limitations and even failures of usingrefers me to a particular person there. about the outcomes of the DETCRC. seismic for hard rock exploration. Apparently there is a final report but it If either of you have any additional oris only available to sponsors and not the I realise that it is becoming more and morealternative suggestions (e.g. on summary of difficult for even oil industry geophysiciststhe workshop format) please dont hesitategeneral public/industry.to share data and ideas and accept thatto let me know.it may be more difficult for mineralsCheersgeophysicists (possibly due to the way mineral leases are licensed?). JohnHenderson byte: Henri BecquerelAnother famous scientist whose name is used as an SI unit is Antoine Henri Becquerel (18521908). The Becquerel, with the symbol Bq, defines the activity of radioactivity where one Becquerel is equivalent to one atomic disintegration per second. As this is a very small unit, a more practical unit is the Curie (Ci) in cgs units. 1 Ci = 3.7 x 1010 Bq.Radioactivity in nature has enabled geophysicists to develop a number of applications. The direct detection of uranium and other common emitters of gamma rays, such as potassium and thorium, contribute to the mapping of geology, especially with airborne detectors. Radioactivity is also important in oil and gas exploration with bore-hole logs using a radioactive source to estimate porosity, etc. Radioactivity is used in engineering geophysics to map faults, groundwater contamination and the extent of industrial waste. Radiocarbon dating, which we rely on to determine geological ages, makes use of the half-life of radioactive decay.In January 1896, Becquerel heard of Roentgens discovery of x-rays, and thought that the phosphorescent uranium salts he had been studying might absorb sunlight and reemit it as x-rays. After some tests with photographic plates shielded from the sun that on developing, showed clear outlines of objects, he concluded that the uranium salts were emitting radiation without sunlight. In May 1896 he announced that the element uranium was indeed what was emitting the radiation. In 1899 Becquerel showed that unlike x-rays, which are neutral, his rays could be deflected by electric or magnetic fields.(See more at: https://www.aps.org/publications/apsnews/200803/physicshistory.cfm).In 1901, when Becquerel left a piece of radium in his vest pocket, he noticed that he had been burnt by it. This discovery led to the development of radiotherapy, which is now used to treat cancer. He was awarded the Nobel Prize for Physics in 1903, jointly with Pierre and Marie Curie for their studies of Becquerel radiation.Becquerel came from a family of scientists. His grandfather, Antoine Csar Becquerel, had discovered piezoelectricity and his father, Alexandre-Edmond Becquerel, had invented the phosphoroscope, a device that measures how long a phosphorescent material continues to glow after removing the source of light.Becquerel died in August 1908, at the age of 55, in Le Croisic, France. His name is remembered in craters on the Moon and on Mars and a mineral called Becquerelite.Roger Henderson rogah@tpg.com.auAPRIL 2022 PREVIEW 36'