Macmin Silver wird Explodieren
Ich gehe aber lieber in Coer`D Alene Mines. Prod. 3 Millionen Unzen etwa im Jahr.
Nur meine Meinung.
[u][b]32 The Australian Mining Review AUGUST 2008
SPECIAL PROFILE Twin Hills Silver Mine[/b][/u]
http://www.macmin.com.au/media/2008/AustMiningReviewAug2008.pdf
Silver mine moving to increase production
MACMIN SILVER’s Twin Hills
Silver Mine in Texas, Queensland,
should start increasing production in
September-October after new processing
equipment is installed.
Chairman and chief executive Bob
McNeil said the upgrade of the crushing
and screening equipment was initially
due for completion at the end of
March, but the tight market for
such equipment has meant that it
is only being installed now.
“We should start to increase
capacity from September-October
… but until we get some feel on
how it works we’re a bit reticent
to actually predict how much at
this stage,” he said.
“It will certainly be a
substantial increase on the
present production.”
The Macmin crushing circuit
currently crushed more than
20,000 tonnes per month to the
required minus 4mm.
“Planning is proceeding to
move to extended crushing hours,
probably two eight hour shifts,
but is still restricted
by difficulty in hiring
suitable personnel,” Mr
McNeil said.
“Because of intense
competition for trained
operators in the mining
industry at present, we
cannot hire sufficient
trained personnel and
consequently we have
had to train our own
operators.
“This is time
consuming.”
Texas, near the border
of NSW, is about 3.5
hours’ drive south west
of Brisbane.
The Twin Hills Silver
mine is 10km east of the
township of Texas and
most of the 52 people on
the payroll are locals, Mr
McNeil said.
[b]History[/b]
Exploration on the Texas Silver Project
began in 1994 by the company and its joint
venture partner, Hunter Exploration.
Significant silver mineralisation
was delineated by 1998 and Macmin
re-acquired Hunter’s interest.
After further extensive drilling, the
initial Twin Hills feasibility study was
completed at the end of 2000.
In March 2004, as the international
price for silver started to increase,
Macmin decided to commit to, and raise
funds towards, developing the Twin Hills
Silver Mine.
Site clearing began in 2005, along with
staff recruiting and training.
The following year saw overburden
removed, the crushing plant installed and
the electrowinning plant constructed.
Mining began early last year in
conjunction with the commissioning of
the processing circuit and production of
the first silver powder.
Fine-tuning of
the crushing and
electrowinning plants
continued throughout last
year.
[b]Heap Leaching[/b]
Twin Hills used a heap
leaching process that was
introduced to the industry
in the 1970s as a means
to drastically reduce gold
recovery costs, Mr McNeil
said.
“It is also effective with silver in certain
circumstances,” he said.
“This process has literally made many
mines by taking low grade resources and
transforming them into a viable mine.
“Heap leaching involves placing
crushed or run of mine ore in a pile built
upon an impervious liner.
“Cyanide solution is distributed across
the top of the pile and the solution
percolates down through the pile and
leaches out the silver/gold.”
The silver/gold laden pregnant solution
drains out from the bottom of the pile and
is collected for recovery.
“Heap leaching generally requires 60
to 150 days for processing ore that could
be leached in 24 hours in a conventional
agitated leach process,” Mr McNeil said.
“Recovery is typically about 70 per
cent as compared with 90 per cent in an
agitated leach plant.
“Even with this lower recovery
performance, the process has found
wide favour, due to the vastly reduced
processing costs compared with agitated
leaching.”
Mining at Twin Hills is carried out using
hired equipment operated, supervised and
directed by Macmin staff.
“Mining of ore and waste is proceeding
to plan and there are no problems in this
department,” Mr McNeil said.
[b]Crushing[/b]
To recover 70 to 72 per cent of silver from
the rock, the ore must be a certain size.
This is achieved either by crushing or
during blasting of the ore prior to mining,
Mr McNeil explained.
But the crushing circuit, as specified
by the feasibility study and operated on a
single-shift basis, could not achieve sufficient
crushed material due to maintenance
problems with the crushing circuit, the
inability to hire sufficient trained operators
to run more than a single day shift, and
inadequate screens to remove the fine
fraction early in the crushing process.
The screens incorporated in the current
circuit were inadequate to remove the fines
at an early stage in crushing, which resulted
in the circuit clogging up and maintenance
problems, he said.
If crushing could have been maintained
on a 24-hour basis, this problem could have
been partly offset.
A further unanticipated problem was
that the ore was harder and more abrasive
than predicted.
To solve the problems, Macmin is
upgrading the crusher with additional
screening, adding a second contract
crusher the circuit, incorporating closer
drill and blast patterns in the mine plan
to produce as much minus 4mm product
as possible without crushing, moving to
two shifts, and having a contract crushing
supervisor on site.
“Our initial target is to place 60,000
tonnes of minus 4mm material on heaps
each month, moving to 100,000/120,000
tonnes per month as ore grades decrease,”
Mr McNeil said.
“This latter target may require further
crushing capacity.
“The timing of achieving the initial
objective of 60,000 tonnes a month onto
the heaps is difficult to predict.”
[b]Silver[/b]
The silver is extracted from pregnant
solutions using an electrowinning process
and the plant, which contains 180 cells,
runs on a 24-hour, seven-day-a-week
schedule.
Each cell in the plant has not produced
at the rate specified by the manufacturer
but, by experimentation, its capacity is
gradually being increased, Mr McNeil
said.
“Problems have also arisen with the
coatings on some anodes and these have
now been replaced,” he said.
As the plant was designed with at least
50 per cent overcapacity, the reduced
capacity of each individual cell is not
expected to be a problem with production
in the near term, but could restrict
expansion.
The leaching solutions from the heap
carry 60 to 90g/t silver and the plant has
been inefficient in extracting or reducing
the silver in leach solutions below 40g/t
silver.
These barren solutions, which still
contain 40g/t silver, are then recycled to
the heap, with further dissolved silver
rebuilding the solutions to 60 to 90g/t
silver, Mr McNeil explained.
“There is a concern that it is inefficient
to recycle solutions with as much as 40g/t
contained silver,” he said.
Consequently, a Merrill Crowe (or zinc
precipitation plant) has been installed to
remove further silver.
“The intent is that silver will be
reduced to 40g/t by electrowinning, then
pass through the Merrill Crow, which will
reduce silver content to less than
10g/t,” Mr McNeil said.
“This barren solution will then
be recirculated to the heaps.”
Macmin is selling some of the
silver powder produced “as is” for
specific applications.
“However, an unexpected side
effect of the EMEW plant is that
it also extracts some other metals
and the silver powder produced to
date contains contaminants which
are unacceptable to some buyers,”
he explained.
“These are removed before
smelting and this being done
successfully in Melbourne.
“The silver powder can then be
smelted, refined and sold.”
[u][b]OnTrax gives mine a boost[/b][/u]
FOR TWO months, OnTrax Crushing and
Screening has been providing booster
plant support for Twin Hills Silver
Mine’s crushing operations in an effort
to capitalise on the current commodity
price.
The company said it was experienced in
campaign crushing such as for Brisbane’s
Gateway/Leighton joint venture and along
the coast.
Quarry campaign crushing for other
companies included contracts with Boral
and Hansons.
These jobs involved making aggregate
in order for the fixed plant to maintain
production.
[green][b]OnTrax said it looked forward to a
continuing association with Twin Hills.[/b][/green]
Macmin 28 08 2008 :
Macmin 28 08 2008 :
Personal gibt es genug, wenn man es nur ordentlich bezahlt.
Ein weiteres Zeichen,dass Macmin das Geld ausgeht.
nicht ganz so gut recherchiert - Minespec
Crescent kein Einzelfall - Der Australische Markt für Nebenwerte liegt am Boden
Stuttgart (www.rohstoffe-go.de) Crescent Gold steht mit seinen Problemen keineswegs alleine da. Der gesamte australische Markt für kleinere Goldminen und Explorationsunternehmen steckt in einer schweren Baisse. Martin Siegel, Fondsmanager des auf Australien spezialisierten PEH-QGoldmines Fonds sieht in seinem Börsenbrief im Wesentlichen zwei Faktoren, die zu der aktuellen Krise geführt haben. Zum einen die Kostenexplosion bei Energie und Personal - Energie macht insbesondere bei Tagebauprojekten bis zu 60 Prozent der Kosten aus. Zweitens beobachtet Siegel, dass es offenbar einen Engpass bei qualifiziertem Betriebspersonal gibt. Das bestätigen auch unsere Kontakte in Australien. Die Unerfahrenheit und/oder fehlende Motivation vieler Mitarbeiter – bei gleichzeitig hohem Lohnniveau, scheint ein strukturelles Problem der Industrie zu sein. Hinzu kommt, dass vor ca. zwei Jahren viele Gesellschaften gleichzeitig den steigenden Goldpreis zur Rückkehr in die Produktion (oder zum Aufbau neuer Produktion) nutzen wollten. Dabei wurde die knappe Ressource Personal erst recht strapaziert. Dabei sollte man nicht vergessen, dass beim Wettrennen in die Produktion einige Firmen schon wieder ganz von der Bildfläche verschwunden sind. Man denke an Gleneagle, BMA oder Monarch. Andere wie Bendigo sind grandios gescheitert. Aktien von St. Barbara, Norton, Dioro haben sich im Wert gedrittelt oder geviertelt.
Als Paradebeispiel für die aktuelle Krise zitiert Siegel die geplatzte Kapitalerhöhung beim Goldförderer St. Barbara, der Nummer drei in Australien. Wegen massiv fallender Kurse konnte die Macquarie Bank 123,6 Mio. Aktien einer bereits sicher geglaubten Kapitalerhöhung nicht wie vorgesehen bei Privatinvestoren platzieren und blieb schließlich selbst auf den Aktien sitzen. Der Buchverlust beträgt zurzeit 17,3 Mio. AUD. Siegels Kommentar lässt an Deutlichkeit nichts zu wünschen: „Es ist klar, dass der Markt für Kapitalerhöhungen völlig zerstört wird, wenn der drittgrößte australische Goldproduze...
www.emfis.de/global/global/nachrichten/beitrag/id/...den_ID72686.html
Übrigens den Herrn im Image habe ich persönlich gesprochen auf der Edelmetallmesse an seinem Stand 2007.
ER empfahl mir damals Commerce Res.und Tiger Res. Habe ich nicht gekauft und damit Verluste vermieden.
Ich sitze das aus und bin guter Hoffnung das aus dem Mini-explorer ein grösserer wird.
Die Produktionszahlen steigen stetig und ich habe Zeit.
Für mich ist Macmin jetzt Gefahr laufend insolvent zu werden.
Oder kurz vor Übernahme zu extrem niedrigem Kurs.
Nur meine Meinung.
http://www.macmin.com.au/announcements/2008/index.htm#Sept0108
Nur 73000 Unzen wurden im JUli 08 verkauft, viel zu wenig um Kosten zu decken.
http://www.macmin.com.au/reports/quarterly/pdf/...ly-report-jun08.pdf
Über die Cashposition keine Angaben, verdächtig!
Aber ab 1.9. eine weitere Kapitalerhöhung ( und damit Verwässerung ) geplant.
Warum ?
Weil die jetzt laufende US Dollar Rally sich auch auf die E-Metalle Ende des Jahres übetragen wird.
Nurt meine Meinung.
sind wir ja zu 30 Prozent? beteiligt.
Suite 422 - 470 Granville Street, Vancouver V6C 1V5 Tel. (604)-662 3598 Fax: (604)-669 6257 | |
Pressemitteilung | 15. August 2008 |
Sinvit Bohrungen schneiden 20m mit 25.7g/t Gold | |
|
auch dieses.
Suite 422 - 470 Granville Street, Vancouver V6C 1V5 Tel. (604)-662 3598 Fax: (604)-669 6257 | |
Pressemitteilung | 22. August 2008 |
Bohrungen auf Sinivit schneiden weitere oxidische Goldresulltate so wie 20m mit 17,2 g/t Gold | |
Die Bohergebnisse können hier eingesehen werden: http://www.newguineagold.ca/announcements/2008/...008.html#august2008 |
dieses will ich auch nicht vorenthalten.
Suite 422 - 470 Granville Street, Vancouver V6C 1V5 Tel. (604)-662 3598 Fax: (604)-669 6257 | |
Pressemitteilung | 09. September 2008 |
Weitere Bohrungen dehnen die Central Oxide Zone in Sinivit mit Ergebnissen von 6m mit 21 g/t Gold aus | |
Weitere drei RC-Bohrungen in der Central Oxide Zone in Sinivit ergaben Oxdi-Goldmineralisation, wobei das Beste Ergebnis 6m mit 21,5 g/t Gold ergab. Sämtliche Bohrergebnisse und die Koordinaten der Bohrungen finden Sie unter folgendem Link: http://www.kitco.com/pr/1267/article_09082008094058.pdf (Anm.: Die tatsächliche Breite der Intervalle ist nicht bekannt) Bob McNeil, Chairman und CEO kommentiert: „Die Bohrungen in der Central Oxide Zone liefern weiterhin exzellente, oberflächennahe Goldgehalte. Diese Resultate sind deshalb so signifikant, weil die Bohrungen, welche zur Ressourcenschätzung führten, Gold in Tiefen von mehr als 30m nachwiesen, aber aufgrund von Schwierigkeiten beim Zugang keine oberflächennahen Bohrungen durchgeführt werden konnten. Die jüngsten Bohrungen deuten darauf hin, dass sich die Goldmineralisation bis an die Oberfläche fortsetzt“. Alle Proben werden vor Ort vorbereitet und auf Größen von jeweils 500g zerkleinert. Die weitere Vorbereitung und die Analyse der Proben wird im ALS Chemex Labor in Townsville, Queensland, Australien vorgenommen. | |
Im Namen des Vorstands R.D. McNeil |
Macmin NEWS 24 09 2008 : Entitlement Issue Closed
http://stocknessmonster.com/news-item?S=MMN&E=ASX&N=203513
Macmin NEWS 24 09 2008 : Sale of Shares In New Guinea Gold Corp by Macmin
http://stocknessmonster.com/news-item?S=MMN&E=ASX&N=203514
Macmin NEWS 29 09 2008 : Annual Report to shareholders http://stocknessmonster.com/news-item?S=MMN&E=ASX&N=203657 Macmin NEWS 29 09 2008 : Allotment - Entitlements Issue |
Macmin NEWS 29 09 2008 : Twin Hills Silver Mine Upgrade
und was macht der kurs? heute minus 14 Prozent und die mk bei 7,8 mio Euro.
Kaufkurse.
Macmin NEWS 01 10 2008 : Expiry 30 October 2008 Options MMNO
Der totale Kursverfall zeigt den scheinbar bevorstehenden Totalverlust !
Es hat sich bisher auch kein Retter gefunden, der die Assets aufkauft.
zuzüglich 72.000 unzen zur zeit auf lager
mk 7,4 mio euro
macmin ist KEIN explorer, sondern produzent, der seine anlaufschwierigkeiten in den letzten 1,5 jahren nach und nach beseitigt.
Wednesday , 22 Oct 2008
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A recently completed diamond core hole at Silver Spur, Texas Project, Southeast Queensland, Australia, has extended the known and previously mined mineralisation to depth by at least 50 metres. Silver Spur is located 1.5km south-east of the Twin Hills Silver Mine.
Historically, Silver Spur was mined for silver in the late 1800's to early 1900's. Approximately 2 million ozs of silver was recovered from 100,000 tonnes of ore mined at an average mined grade of 800g/t silver, 25% zinc, 13% lead and 1.5g/t gold (historical record from Rimfire Pacific Mining NL prospectus). The mine closed at the advent of World War 1.
The first diamond core hole (SSD5) of our current exploration programme, targeting depth extensions of the historic Silver Spur Mine workings has recently been completed. The hole has intersected a significant mineralized zone from 215.73-237.17m (21.44m downhole) at 9g/t Silver, 1.53% Zinc, 0.86% Lead and 0.05% Copper. This zone in turn contains several higher grade zones as specified above (Figure 2). This mineralised zone sits approximately 50m below the position of the historically mined ore zones.
Several significant intercepts were encountered within a wider zone of zinc/lead/pyrite mineralisation. Those intercepts are:
2.62m @ 33g/t Silver, 4.88% Zinc, 2.80% Lead & 0.14% Copper from 221.36m incl. 0.49m @ 82 g/t Silver, 11.90% Zinc, 7.26% Lead & 0.32% Copper from 221.36m
1.61m @ 7g/t Silver, 3.08% Zinc, 1.56% Lead & 0.01% Copper from 227.84m
0.40m @ 51g/t Silver, 8.36% Zinc, 5.36% Lead & 1.12% Copper from 234.25m
Figure 2, is a schematic cross section showing the position of SSD5 in relation to the Silver Spur Mine workings, SS26 and an historic government drill hole (NS5). Historic literature indicates that hole NS5 intersects a pyrite rich zone approximately 35m along strike to the south and 60-70m below the mineralised interval intersected in Macmin's SSD5 hole.
Historic Rimfire Pacific Mining drill holes are also shown on Figure 2 and intersected two sub/parallel mineralised zones. Results were as follows:
SS26 6m @ 132g/t Silver, 0.33g/t Copper, 4.82% Lead and 5.95% Zinc from 130m 8m @ 95 g/t Silver, 0.3g/t Copper, 3.4% Lead and 8.65% Zinc from 152m
SS27 8.5m @ 182g/t Silver, 0.2% Copper, 3.4% Lead and 7.5% Zinc from 148m
The interval outlined in hole SS26 is approximately 10m along strike to the north of hole SSD5 in plan view, while the interval outlined in hole SS27 is approximately 10m along strike to the north of hole SS26 in plan view.
The historic Rimfire holes (mentioned above) indicate significant widths of mineralization located beside (to the east) of the workings, with hole SS27 having a very large mineralised interval beyond that outlined above (53.55m at 88 g/t Silver, 0.14% Copper, 1.93% Lead, and 4.46% Zinc from 116m as reported by Rimfire Pacific Mining in 1999).
Paul Abbott, Manager Geological Services for Macmin noted: "These historic intercepts combined with the results from the recently completed Macmin hole (SSD5) indicate that thereis considerable scope to delineate economic grade mineralisation both below and along the strike from the current workings. However, considerable further drilling will be required to establish if sufficient tonnes of this material can be outlined.
Follow up drilling will include targeting below the Rimfire holes situated to the north of Macmin's SSD5 drill hole, as well as below and along strike to the south of hole SSD5. This drilling as well as other major exploration expense, will be deferred until the Twin Hills Silver Mine is cash flow positive".
Collar locations for the Rimfire Pacific holes are as follows: SS26 was collared at 331640E 6805660N* with an inclination of -60 degrees on a bearing of 270 degrees magnetic, SS27 was collared at 331596E 605690N* with an inclination of -80 degrees on a bearing of 270 degrees magnetic. (*AGD66/AMG56)
Macmin Drill Hole SSD5 was collared at 331670E 6805635N (AGD66/AMG56) with and inclination of -60 degrees on a bearing of 300 degrees magnetic. A percussion pre-collar was drilled from surface to 57m, followed by diamond core drilling to a final depth of 254.5m downhole.
Sampling & Assaying Details
Sampling of Diamond Core was undertaken over mineralised and altered zones, sample intervals were determined from geological intervals. In broad zones of alteration 2 metre intervals were selected. As part of the Company's quality control programme, a duplicate sample is collected about every 20 samples and submitted under a different sample number providing a check on repeatability.
Assaying is carried out by ALS Chemex in Brisbane using the ICP technique for silver, copper, lead, zinc, arsenic and antimony. Gold is assayed by the Aqua Regia technique.
Drill holes Collars have been located with a hand-held Garmin GPS unit. Down hole surveys are recorded with an Eastman style single shot camera.
Yours faithfully,
MACMIN SILVER LTD
R.D. McNeil
CEO & CHAIRMAN
The Company
Bericht mit Lageplan und Bildern:
www.macmin.com.au/announcements/2008/pdf/...lver%20Spur%2022Oct08.pdf
Die Installation der mechanischen Komponenten im Erzzerkleinerungskreislauf ist abgeschlossen und dieser wurde bereits in Betrieb genommen. Eine erhöhte Menge an zerkleinertem Erz für das Aufbringen auf den Laugungshaufen sollte in naher Zukunft verfügbar sein.
Basierend auf einer früheren Studie finden sich die Projektionen für die Produktion bzw. die Cash Kosten in der Twin Hills Silbermine in der untenstehenden Tabelle....http://www.macmin.com.au/announcements/2008/pdf/...orecast23Oct08.pdf
Die Produktion wird nachweislich immer weiter erhöht.
Ende 2009 sind es dann schon 600.000 Unzen!