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Showing posts with label wolframite. Show all posts
Showing posts with label wolframite. Show all posts

Sunday, 6 March 2016

SMITH’S MICA LODE TORRINGTON

In 1993 Minerama adopted beryl as its theme mineral for that year’s show. This led to the compilation of the “Beryl” booklet (downloadable here (No longer available there. You can find it now in this blog) mineral displays and several field trips to beryl localities. One place the organisers visited was Smith’s Mica Lode at Torrington, shown to us by John Griffey. This was the only time I visited the place, but I kept some of the specimens until we moved from Glen Innes in 2013. They contained more beryl crystals (all opaque, sadly) than I have seen from any other locality near Torrington.
Derived from MINDAT. The pink crystal locates Smith's Mica Lode. The granite country and the Torrington sedimentary pendant can easily be distinguished.

It wasn’t easy to get to then and presumably it isn’t today. Access was through private land from the site of Tungsten village and then on foot through the Torrington State Forest. The outcrop is of pegmatite in which beryl, biotite and feldspar dominate. As you can see from the various maps included in this blog, the site is within the Torrington State Forest. It is a couple of hundred metres from the granite boundary and the country rock is sedimentary strata into which the pegmatite dyke has intruded from the granite beneath.
From a 1981 publication on mining at Torrington. Smith's Mica Lode is located top centre. The blue line locates the edge of the granite.

The "Beryl” booklet incorporates quotations from several sources (all of which are no doubt downloadable from DIGS. The link to DIGS is here. (Doesn't work)) I won’t repeat any of this information here. The one reference I have included dates from 1972 but I can’t track down the source. I found it during a search of DIGS. 
The Grafton Maclean Metallogenic Map locates Smith’s Mica Lode by the number 0551. (Green circle, top centre.) The accompanying notes tell us that Be, Bi, W, U, Sn, Zn and Cu minerals have been found there. Mindat (to be found here) gives the following information:

“Smiths mica (Mica lode; Smiths mica mine; Junction reefs), Torrington, Clive Co., New South Wales, Australia. Mineral List: Beryl, 'Biotite', Cassiterite, 'Monazite', Muscovite

Located approximately 7.5km North of Torrington. Coordinates: 370705mE, 6763668mN.
Operated as a shaft and shallow pits 1907 to 1921 and later 1954 to 1957. Grafton-MacLean 1:250 000 map sheet.

The other numbered localities nearby are:

0011 Wren’s NW Workings. Topaz, W, Bi.

0060 The Black Swamp Creek Alluvials. Mindat states: “Black Swamp Creek Alluvials, Torrington, Clive Co., New South Wales, Australia. Located approximately 6 km North of Torrington. Dredging operations from 1907 and sporadically through to late 1950s. Mineral List: Cassiterite, Corundum, 'Monazite', Quartz, Topaz.

This location appears to contain just what fossickers are looking for. Burnt Hut Creek is also part of this system. I would expect to find beryl in the gravel; take note that beryl does not concentrate in a sieve because of its relatively low specific gravity.

0546 Poor Prospect. Mindat states: “Poor Prospect, Torrington, Clive Co., New South Wales, Australia. Located approximately 7 km North of Torrington. Operated as shallow pits. Mineral List: Quartz, 'Wolframite'.

0547 The Wet Deposit. Mindat states: “Wet deposit, Torrington, Clive Co., New South Wales, Australia. Located approximately 7 km North of Torrington. Operated as shaft and shallow pits. Mineral List: Quartz, 'Wolframite'.”

0548 Junction Prospect. Mindat states: “Junction prospect, Torrington, Clive Co., New South Wales, Australia. Located approximately 7 km North of Torrington. Operated as shallow pits. Mineral List: 'Biotite', Muscovite var: Sericite, Quartz, 'Wolframite'.”

0549 Fletcher’s Deposit. Mindat states: “Fletchers deposit, Torrington, Clive Co., New South Wales, Australia. Located approximately 7.5 km North-West of Torrington.
Operated as underground workings, shafts and shallow pits 1913 to 1921. Mineral List: 'Limonite', 'Limonite', Muscovite var: Sericite, Quartz, 'Wolframite', Muscovite var: Sericite'.

0550 Roberts Lode. Mindat states: “Roberts Lode. Located approximately 7.5 km North of Torrington. Operated as a shaft and numerous shallow pits 1910. Mineral List 'Wolframite'.”
0584 Lonely Deposit. Mindat states: “Lonely Deposit, Torrington, Clive Co., New South Wales, Australia. Located approximately 7 km North-West of Torrington. Operated as shallow pits. Mineral List: Quartz, 'Wolframite'.”
1326 Upper Black Swamp Lodes. Topaz, quartz.

From the Beryl book (1993). Specimen from Smith's Mica Lode.

Thursday, 31 December 2015

GADEN’S LODE GULF ROAD, EMMAVILLE

GADEN’S LODE GULF ROAD, EMMAVILLE
This is another old mining area I haven’t visited, or if I have I didn’t know its name and it has faded from memory. There are quite a few mineral deposits in the area, of which Gaden’s appears to be the best known. It has been the site of several Emmaville Gemfest field trips and I am indebted to Jewellery Pirate for information and photographs from his Blog.

If you examine the satellite image from Google Earth you will see the site of Gaden’s Lode marked in pink in the centre (source: Mindat). The most notable feature on the image is the joint pattern in the Mole Granite which occupies a broad swathe of country across the centre. Observe how these joints disappear around Torrington/Torrington State Forest where the granite is still covered by part of its original “roof”. This is the Torrington Pendant of older sedimentary rocks. The joints have controlled the deposition of ore bodies both in the granite and in the adjacent areas where the granite is still concealed by these older rocks.

The map was extracted from the Grafton-Maclean Metallogenic Map; the numbers locate the various mines and prospects. I know that some of the numbers are hard to read and I can’t interpret them all, but here is a list of those I can (lowest to highest) with some information (from Mindat) about each, where there is any. The names in brackets are alternative names or nearby mines/prospects.
0300 Chinaman’s Gully Sn vein (Murphys lode; Suicide tunnel). Operated as underground workings, adits, shafts and shallow pits. Production from 1878 to 1965. Chinaman’s Gully alluvials: Dredging operations until the late 1960s.
0312 Gaden’s Lode Sn W Cu U monazite vein (Gaydens lode; Garths lode; Garths wolfram lode; Garths uranium lode). Operated as underground workings, open cut, shafts, adits and shallow pits from 1877 to the late 1960s.
0313 Stormer’s Lode Sn fluorite Cu U vein (Garths lode; Garths wolfram mine; Garths uranium mine; Gadens uranium mine; Gadens lode; Gaydens lode; Gardens lode). Operated as shallow pits, open cut, shafts and adits 1913 to 1954.
0314 Garth’s Lode Sn vein.
0315 Heiser’s Lode U Sn vein (Garths lode; Fish & Chips). Operated as shafts and pits 1877 to 1968.
0330 Stevens and Charlton vein Sn W (Stormers reef). Operated as shafts and shallow pits 1887 to 1970.
0331 Mineral Tunnel Sn As Zn Pb vein. Operated as adits, shafts and open cut 1889 to 1893. Also alluvials.
0332 Suicide Tunnel Sn vein. Operated as underground workings, shaft and shallow pits 1889 to 1893. Located slightly West of Mineral Tunnel workings.
0329 McKinnon’s Reef vein Sn W As Cu Bi (Paradise lodes; Blue lode; Murphys lode; Garths tin lode; Mineral lode). Operated as underground workings, open cut, shafts, adits and shallow pits 1878 to 1950.
0754 Small prospect Sn vein.
0755 Mineral tunnel alluvials Sn placer.
0757 Minor Lode Sn vein.
0758 Hill Crest deposit beryl pegmatite. Operated as shafts from 1890 to 1890. (This may be a wrong identification)
Ore minerals in Gaden's Mine (photo Jewellery Pirate)
There are three principal types of ore bodies in the area: tin (Sn) veins, which consist largely of quartz and cassiterite, polymetallic veins which contain a wide variety of sulphides such as pyrite, chalcopyrite and arsenopyrite as well as cassiterite and wolframite, and pegmatites, which frequently contain fluorite, topaz, tourmaline and beryl as well as some of the ore minerals already mentioned. All types occur in this location.
Where is this mineral collectors’ paradise? You are 60 years late for the easy pickings, but if you are diligent in searching out the locations listed above (not forgetting the alluvial deposits) you are sure to find something of interest.
The area lies between Flagstone and Paradise Creeks. Proceed along the Gulf Road from Emmaville.  A useful reference is Geo-Log 2011 – a publication by the Amateur Geological Society of the Hunter Valley, beginning on page 42 (here). (missing - try searching for it on Google).The whole publication is worth reading, as are the other Geo-Logs in the series.
Dump at Gaden's Mine
The track to Gaden’s branches off to the right just after the Torrington State Conservation Area is reached. This is after you have crossed Flagstone Creek. Naturally the track condition is going to vary according to weather conditions but it’s unlikely to be drivable by 2 WD vehicles. Searching DIGS (if you can find it) will produce many reports on the area which are easily downloaded.

Of special interest are the references to radioactive minerals from some of these mines

and prospects.. During and after World War 11 there was a lot of prospecting for uranium minerals in particular when it was commonly believed that the world would soon be using nuclear energy as its major power source, as well as for making nuclear weapons. (The extensive uranium deposits in the Northern Territory and South Australia had not then been discovered.) The publication “Radioactive Prospects in NSW” (here) dates from this time. It should be noted that monazite, which contains the radioactive metal thorium, is also found in this area.


Thursday, 4 July 2013

MINERAMA BOOK DOWNLOADS FROM ALF

MINERAMA BOOK DOWNLOADS FROM ALF

Since 1990 the Minerama Committee has staged an annual gem, mineral and fossicking show in Glen Innes, NSW Australia. It is one of the largest shows of its kind in the country. From 1992 to 2000 a feature of the show was a theme mineral booklet, which was given away free in the early years and later sold at low cost.


Each issue has two essential parts. The general information about the theme mineral and most of the photographs were supplied by the late Heide Klingbeil while the Glen Innes locality information was compiled by John Paix, who was also the overall editor for the series. 

Remainders were sold at subsequent shows and they are now being made available for free download from the Australian Lapidary Forum (ALF) website. (See listings later on in this blog.)

ALF is a valuable resource for anyone interested in lapidary, gems and minerals in Australia and contains a large collection of files and photographs which grows daily. It is hosted as a free service by Aussie Sapphire Lapidary Warehouse, a progressive business based in Glen Innes. Why not check out these websites and take advantage of the great features they have to offer?


Aussie Sapphires Facebook page: https://www.facebook.com/AussieSapphire

Australian Lapidary Forum: http://www.aussiesapphire.com.au/forum

The Minerama books are no longer downloadble from ALF. You will find them in this Blog for February and March 2024.

Happy reading! 

Why not check out my You Tube channel here where you can view gem hunting, mining and geology videos.