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Showing posts with label Rainy Swamp. Show all posts
Showing posts with label Rainy Swamp. Show all posts

Thursday, 6 March 2014

KELLY’S HUT CREEK NEAR GLEN INNES NSW AUSTRALIA

KELLY’S HUT CREEK NEAR 
GLEN INNES NSW AUSTRALIA

Kelly's Hut Creek

It’s surprising how few tributaries Yarrow Creek has upstream of the bridge at Pinkett. A search on Google Earth will allow you to follow the creek upstream from the bridge quite easily. On the left bank (facing upstream) there are a few minor tributaries, of which Rainy Swamp Spring Creek is the most interesting. See the blog on Rainy Swamp for information here. Further up there are Mt Slow Creek and Log Paddock Creek near the Mt Slow road bridge. Upstream from there Frenchies Swamp Creek is practically the only one. (See here for information.) These creeks all carry gemstones.
There are one or two right bank tributaries, but the only sizable one is Kelly’s Hut Creek which rises in the 
distant hills towards Guyra as does Yarrow Creek itself. This creek is crossed on the Mt Slow road about 2km before the Yarrow Creek bridge. There is no signpost, however.
The point where Kelly’s Hut Creek meets the Yarrow is not easy to locate. It is a very rocky place and it so happens that the tributary runs under a lot of boulders and is easily missed. For those who are familiar with Dwyer’s property (for a long time a popular fee-paying fossicking area), you take the tracks leading upstream as far as you can go, park near the dingo fence, go through the big hole in it and walk upstream. Kelly’s Hut Creek is on the right about 400 metres further on.
If you actually do this, you will be trespassing on the neighbouring property. All of Yarrow Creek and Kelly’s Hut Creek past the dingo fence are not on Dwyer’s property. Please note that on the various Minerama and Baptist Church Fossicking Group trips, we did have permission from the landowner but as the access track is not passable when the country is wet such outings were rare. In fact, the last of these would have been in 2004.
For about 2km above the junction there are many rocky areas. The gemstones are identical to those in Yarrow Creek, including pyrope garnets. The creek then turns at right angles and runs parallel to Yarrow Creek, though at a distance of about 2km from it. From this bend on, no more gemstones have been found. Searches of the literature through DIGS were fruitless; in fact the one reference I was able to locate stated categorically that, apart from quartz, at no point were any gemstones located. Nevertheless, the various maps showing the location of sapphire deposits in New England always include Kelly’s Hut Creek, showing the very part that I am claiming is barren to be productive and the part that we know is productive to be barren.

If you ever get a chance to fossick here I know you will enjoy it. You will also be able to verify what I have written about the place. As a guess, I think that the lower part of Kelly’s Hut Creek is probably a former course of the Yarrow, though just how this came about I can’t work out. The presence of garnet in the alluvium (found only in the Yarrow and some of its tributaries) implies that at some point in time a source of garnet must have been somewhere upstream. The geology of the catchment area of Kelly’s Hut Creek today suggests that this is unlikely. If someone unravels this mystery one day I will be glad to correct any errors in what I have written here.


Monday, 19 August 2013

RAINY SWAMP NEAR GLEN INNES NSW AUSTRALIA

RAINY SWAMP NEAR GLEN INNES NSW AUSTRALIA

As a gemstone producing location, Rainy Swamp is unusual in several ways. Firstly, the place is not shown on any of the maps depicting sapphire localities and secondly the wash does not appear to be derived from any source nearby. In fact, I would suggest that the gems are being recycled from remnants of an old stream bed a little above the level of the present day swamp. Conversations with people who mined here 40 years ago confirm that the wash horizon could not be traced further upstream around the edge of the swamp.

Furthermore, everything points to a different
Typical small gems
source from that of the gemstones in Yarrow Creek (into which Rainy Swamp Spring Creek actually flows). The percentage of cutters is lower, the zircons are a different shade of pink, there are no garnets and there is an abundance of schorl tourmaline. Quartz crystals are frequent and topaz is found occasionally. If anything, there is a strong resemblance to the mineral assemblage in Back Creek, the next stream to the south. I would venture to suggest that the Rainy Swamp occurrence is a remnant of a former course of Back Creek.
 
The bulk of the material found at Rainy Swamp seems to be miners' waste, though there have been pockets of untouched wash found in less accessible places. It is a very rocky area and the best stones have been found underneath the many granite boulders.

Most fossickers enjoy Rainy Swamp because there is always something to be found, whether it be just a few small sapphires and zircons, some nice quartz crystals, chunks of black tourmaline or the elusive piece of topaz.
120 carat topaz
Tourmaline crystal











An article appeared in "Gold Gem and Treasure" magazine in September 1999 called "Summer Fossicking in the Ranges Around Glen Innes". Although the location is not named (naturally) it is Rainy Swamp. What is described is a part of the old lead which the miners must have missed. Unfortunately, on our many visits we have been unable to find a similar spot due to the disturbance of the hillside since 1999.
Check out my gem hunting videos from around Glen Innes here



Sunday, 7 July 2013

A FEW AUSTRALITE FINDS

A FEW AUSTRALITE FINDS

About 15 years ago I was fossicking for sapphires in Kelly’s Hut Creek, a tributary of Yarrow Creek, near Glen Innes. I noticed a dark object in the top sieve which stood out because of its regular shape. Expecting it to be a piece of black jack (pleonaste or spinel, for those who don't know the lingo), I held it up to the light and was surprised to see that it showed a pale brown colour on the edges.

This changed my thinking. It couldn’t be a piece of regular glass, because it had concentrated in the sieve centre, meaning it had at least an above average specific gravity. Nor could it have been a piece of enstatite or one of the other pyroxene minerals, because of its shape. It wasn’t as transparent as these minerals either, though the colour was similar.

At home, I was able to examine it more closely and came to the conclusion that I had found my first (and only) australite, or glass meteorite.

The same cup cake shaped specimen
Kelly's Hut Creek australite 8mm diameter
About 3 years ago while a group of us was at Rainy Swamp, again after gemstones, Jimnyjerry from ALF found a somewhat larger example. Rainy Swamp Spring Creek is also a Yarrow Creek tributary.
The Rainy Swamp australite, 12 carats
The fact that both came from Yarrow Creek tributaries is unlikely to be significant. If a shower of australites were to fall over an area of eastern Australia tonight, how many would be visible tomorrow, considering how difficult it would be to spot them on the ground in heavily vegetated areas? The ones we found were flukes, having fallen in or close to a watercourse and then ending up in our sieves the way they did.

 I won’t speculate about the origin of these little beauties, lots of other people have been doing that for well over 100 years. If you want to read up on the subject, go to Trove and search the word “tektite” in the category “Books” and “Available Online”. See my blog entry DOWNLOADING BOOKS USING “TROVE” for Tuesday 11th June 2013 for details about how to do that. There are also many newspaper articles about meteoric glass.

 




Two books you may find useful from this source are “The Occurrence, Distribution and Age of Australian Tektites” by RO Chalmers EP Henderson and Brian Mason, 1976 and “A Contribution to the Study of Australites” by CG Thorp, 1913.

 Why not check out my You Tube channel here where you can view gem hunting, mining and general geology videos. New subscribers are always welcome.