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LocalitiesSulphide deposit (Sohlander Bergsegen), Sohland an der Spree, Bautzen District, Saxony, Germany

2nd Dec 2019 21:01 UTCJolyon Ralph Founder

Says the dump is split between Germany and Czech Republic, but according to Google Maps the border runs north of the dump and this locality is also in Czech Republic.

Any comments?

2nd Dec 2019 21:14 UTCAlfredo Petrov Manager

Visible north end of the dump is just about the width of one big tree from the German border, and the ground is hidden under the trees there, so it‘s quite likely there is dump material under the forest on the German side too, and that‘s assuming the border is very accurately depicted by Google, which is often not the case. On the highway to the left, I suppose the border is really where the texture of the road surface changes, although Google puts it several meters to the west of that.

It‘s also possible that German collectors walk around there and don‘t even know they‘re in CZ, so they put a german label on their stones. That sort of accidental cross-border collecting happens on the Spain-France and Austria-Italy borders too.

But I‘m just speculating, until a local person there chimes in.

2nd Dec 2019 22:20 UTCJolyon Ralph Founder

Yes,

But international borders on Google Maps etc are taken from official digital maps so they are very unlikely to be inaccurate for European borders.  

Of course the visible dump may extend into the trees and beyond the border, but if so the point chosen for the dump is incorrect

2nd Dec 2019 22:29 UTCFrank K. Mazdab Manager

maybe it's more relevant to ascertain where the mine itself is (not its dump), because while specimens may have been collected on the dump, the actual place the minerals formed was in the mine. So if the the mine is in CZ but even if the dump is in (or spills over to) Germany, I'd still be tempted to locate the minerals in the CZ.  Of course, if the mine workings are extensive and its tunnels criss-cross beneath the national boundary, then however we handle localities that cross county lines, or state lines, might be applicable to national boundaries too?

2nd Dec 2019 22:40 UTCJolyon Ralph Founder

It appears that two localities have been created for this dump, one in CZ and one in Germany, purely for the purpose of having the minerals listed in both countries!

I think the safest course of action is to merge the two together into the CZ entry.

2nd Dec 2019 23:20 UTCThomas Lühr Expert

I am from Germany, but i know that locality not in person. I think, however, that the mine belongs to Sohland. All litereture i know, regardless from what time, mentions it as "Sohland an der Spree". I have never read anything that it is located "in Böhmen". 
I think that the mine was located at the German side and the dump extends into the Czech territory.

3rd Dec 2019 00:06 UTCMark Heintzelman Expert

The Sohland-Rožany ore field is noted as near Sluknov, N.W. Czech Republic and S.E. Saxony, Germany (Beck, 1909; Kopecky et al., 1963), where diabase dikes (5-20 m) intruded a late Proterozoic cataclastic granite. Massive lenses, veins and impregnations of iron, nickel and copper sulphides formed ore shoots up to 400 m long.

I've yet to find note of, or any specific placement for, a Sohland-Rožany Mine (Grube Sohland-Rožany) or it's adits on either side of the border. I have to confirm though, that most of the references and studies I did find on the geology of this area has been published in german and focuses on the german side of the border. This may well be simply a matter of academics, but I tend share Thomas's perspective on the matter, at least until it can be confirmed one way or the other.

 
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