Tunguska crater found?

[saurc]

I recall reading somewhere that there were small diamonds formed near the explosion area, it that right?

 

[JonClarke]

Indeed there were. However, they were of terrestrial origin. if impact related by may have formed as a result of processes within the fireball. http://adsabs.harvard.edu/abs/1995Metic..30S.521H<br /><br />Jon <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em>  Arthur Clarke</p> </div>

 

[3488]

Hi Jon,<br /><br />If thet were imapct related, then that would have been tremendously powerful.<br /><br />Could the forest produce Diamonds in an impact, the Carbon within the organic material being<br />compressed hugely?<br /><br />Just a thought.<br /><br />Andrew Brown. <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p><font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br /><font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p><font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>

 

[JonClarke]

Hi Andrew <br /><br />Shock diamonds have been reported from urelites and are destinct from primordial diamonds that are of intersetellar grains. Impact diamonds have been found at several impact sites, including Meteor Crater in Arizona. <br /><br />Jon<br /><br /> <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em>  Arthur Clarke</p> </div>

 

[3488]

Hi Jon,<br /><br />Thanks for your answer.<br /><br />The urelites IIRC, are from the impacting body?<br /><br />AFAIK, when Meteor Crater formed, the area apparently was covered in grasslands with <br />pockets of Pine Forest. Very different from the drier desert conditions of today.<br /><br />I was just wondering if the Carbon in living oranisms was compressed into diamond<br />during the impact event.<br /><br />Mind you, the amounts involved would have been minimal compared to the carbon <br />contained within the impactor.<br /><br />Another point, with Meteor Crater, I had seen somewhere that the <br />explosion was about 150 Hiroshimas (150 x 15 Kilotonnes = 3.831 Megatonnes).<br />That cannot be nearly enough surely???<br /><br />Andrew Brown. <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p><font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br /><font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p><font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>

 

[JonClarke]

Hi Andrew<br /><br />It is my understanding that the urellite diamonds are from collisons in space.<br /><br />With respect to Meteor Ctrater the bedrock is limestone. Lots of carbon there. The impacting body was an iron, so had no carbon.<br /><br />Nearly four megatonnes is a lot of energy. Clearly enough to generate transient pressures. I can look up moe details if you like, there should be a few abstracts on the internet.<br /><br />cheers<br /><br />Jon<br /><br /> <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em>  Arthur Clarke</p> </div>

 

[saurc]

Ah, thanks for clarifying