Document LK1X3bj8y6qby5jv6EBexwrDX
FILE NAME Talc TALC DATE 1971 Sept 9
DOC TALC421
DOCUMENT DESCRIPTION Desert Minerals Inc. - Definitions
Asbestos & Talc Minerals
scawuyteranacartar
aycsuneas
veepanees
DESERT MINERALS INC
DEFINITIONS ASBESTOS & TALC MINERALS
.
|
Segregated September 9 1971
from DefinitIindo ustnris al Minerals and Rocks ~ Third Edition A.I.M.E. 1960
by Seeley W. Mudd Series
BO
ASBESTOS Pages 23 to 53
,
of for number fibrous mineral silicates Incombustible and can be
-
Broad
term
a
mechanical
means
into
fibres
of various
lengths
and thicknesses
but
dif-
separated by
fering in chemical and other properties Six varieties
- 1. CHRYSOTILE - finely fibrous form of serpentine
~-~ and five minerals of the AMPHIBOLE group
He
Ce
OF
2. AMOSITE - not fully recognized as a mineral accepted in asbestos
a
terminology
3 ANTHOPHYLLITE
4.. CROCIDOLITE
5. TREMOLITE
.6 ACTINOLITE
CHRYSOTILE
reactions within the serpentine rock
of Chrysotile is the result hydrothermal
dolomitic limestone It
whether
it be peridotite
dunite
pyroxenite
of
serpentinized and is the grade
most
generally used
is the most highly fibrous of asbestos minerals
of the minerals from which asbestos
in asbestos cements insulation gaskets etc. None
to is derived appear be among those associated . with talc
The fibres may be easily
Se
. separated and can bespun or woven :
" CROCIDOLITE and AMOSITE
Crocidolite
and
Amosite
occur
in
metamorphosed
ferruginous -
sediments
_
again not common with talc
. ANTHOPHYLLITE andTREMOLITE
loss Except Both have a low ignition
Anthophyllite is similar to tremolite
it is
a magnesium
ferro
silicate whereas
tremolite
is calcium magnesium silicate consists Antho-
whereas tremolite consistosf
phyllite has a laminar fibrous asbestiform structure
of
sufficiently
aggregates long presmataincd fibrous
Neither is possessed
fibres
to make them valuable in asbestos
flexible to be spun nor with tensile strength required
cements
in them Both
known to be present some tales or associated with
are
000127
DESEP MINERALS INC DEFINITIONS ASBESTOS & TALC MINERALPaSge 2 September 9 1971
CHRYSOTILE from of Chrysotile constitutes about 93 of the current world production asbestos
almost all of which is derived from lost rocks which are ultrabasic in composition the balance being serpent seripeznte izd ed dolomitic limestone Approximately 5.4 of the
world productioins from amosite and crocodolite Tremolite and anthophyllite account
for only 1.6 of the world production mostly for filler use
Production of the Amphibole varieties of asbestos other than amosite and ||
crocidolite
_ crocidolite is comparatively limited
In the United States the production of antho-
phyllite has been on the decrease with principal production being in North Carolina
See attached tables for detailed types of asbestos
CONCLUSIONS
is almost entirely used for its fibre structure It is the most
Chrysotile
dangerous when breathed
Tremolite is an almost negligible type industrially
TALC and SOAPSTONE Pag^'s 835to 850
mineral Talc the
is a hydrous magnesium silicate with a suggested theoretical .
formula H2Mg3 or H20.3Mg0.4S102 which postulates 63.5 S102 31.7 MgO and
4.8 H20
an |
oe
oo
Industrial talcs do not approach above composition but are mixtures of silicates
that contain appreciable proportions of magnesia Other minerals common in industrial
talc are serpentine chlorites TREMOLITE ANTHOPHYLLITE diopside and quartz The
carbonates are also present -~~ calcite dolomite and magnesite
Some of these minerals have a pronounced effect on the properties of the talc
are highhl ighy ly desirable for specific use An example of this type is the highly
desirable tremolitic talc mined in New York state and California and ideally suited
__. for use in some paints and ceramics
Much of this type of talc contains 50 or more
talc
of TREMOLITE
"
STEATITE TALC
_ Massive rich material and refertso anespecially pure tale that contains no more than 1.5 CaO 1.5 combineFedO and Fe203 or % A1203
. Pure F
as a hardness of 1.0 to 1.5 is relatively inert and remains undecom-
poseidn conect with acids
. oo
Most talc and soapstone deposits occur in altered ultrabasic igneous rocks and in metamorphosed dolomitic limestones Page 837 - Occurrence and Distribution .
New Most deposits are localized along shear and shatter zones in a nearby static
;
On the other hand in the SILVER LAKE district of California and at
environment
York zones of talc schist intimately associated with massive bodies
_ GOUVERNEUR
of tremolitic rock
appear
to
have
been
formed
during
strong
rock
deformation
*
|
000128
SoA RD RRLSRE REA TER
DESERT MINERALS INC DEFINITIONS ASBESTOS & TALC MINERALS Page 3 September 9 1971
.
SOAPSTONE SOAPSTONE continued TALC and
:
Especially productive and high grade talc deposits formed by the alteration of
magnesium carbonata sedimentary rocks occur in Northern New York Eastern California
and Montana
The New York deposits near Gouverneur New York consists of fibrous talc
tale composed largely of tremolite anthophyllite serpentine and
In the region of Southern Death Valley and the Kingston Mountains tale deposits
are composed of grained tremolite and the mineral talc in both foliated and
deposits Myo Palmetto massive varieties
+
Talc
in the
Mountains of Californiaand the
in Western Nevada are of steatite and steatite variety
district Similar talcs are also
vo
produced in various sections of Montana
Both the fibrous fibrous and steatite varieties are used by and favored by
necessarily small free excellent color and such of of of paint paper plastics rubber roofing insecticide flooring composition
flooring and many other filler | uses Pharmaceuticals and cosmetics account for about
. 20,000 tons per year including soaps creams salves rouges and toilet powders
Talcs Talcs for
use
musmt ustbe
grit
and
particle size
Attachments
000129
.
.
-
"pe 0) TO
:
do f9 +
am Shae
SB we 3 2 _ -
-
te
okt
Mey ayo swe .
UAE
.
yeOSe tPaperd ayoerty
+ g 4G ByJs708 app
emporany -wapsuoas g
.
Propertius
aepomeee
faecs tO Propetius ^ban woysey Asbestos WHOLE Crecidolite buoysporqy oGyy Zq8ey
20 TABLE
of
.
digg 2.) Propertius Beoy
|
.
^ ban ss SES Fieped BaynoSes paugnu; aeS SOuygsaucy
WR ory youd), boysed Crecidolite
|.
Actinolite
|
|
pte
Property long | : sacra
Reticulated a
lamelar crystaline fibrous Fibrous wmargi waWay Abers
|
|
In
Amosite +
peo
Coarse Coarse
fine andand
crystalsand
v
.
hcrystaline hcrystaline
hcrystalineschists
.etc
|
-jo1aye
os Uwaly
crystaline schishin
gnelses
gnelses
highly esu y
iron t^>ones
oy
esuy HE
OE
Iron peridatite peridatie rich siliciousorg~-
VE
[-usdies teay 2pses
Piopued crystaline sopsyrs gnelse pea of
-Opnard) meto- Regional Ligdsysuy Results
apQoiedna contactcontact Matmorphic Matmorphic Metamorphic Alteration and Agonty pase wercizo met- Songcon meto- cag wy amorphism
jf
|
schistschistWsoy FQN . Bom ;
so
99
pve Dar Mat
Matmorphic
_
tesy 7.
Waelgs Metamorphic Usually Usualy olivne olivine sAeat
limestone
quortsNS
SF
igneous melamo Regional melamo and
04melamo
pham
rich in pham prosYyOg
- ] ||
WOE sa Valsing
fenps Cros Valsing
lacing Forgiy mass S^...p un- MITE
.
me Cros
seqy PEO
:
vee mo. :
yn
and
Mass
with
fave slip
.
compsit Hydroulicate Hydroulicate sartqeuk Silicate mag-Silcota tron Esential
sugohe Silcate Mg Silcota Hydroulicate
'
Asbestos
209,"BOyNteq CaMg.Fe. Mg.Fe with of mag- Fe OPEN NoFe SO 3MgO.2 ] uy pup aan p} ct Sophylite Sophylite | O.2HO O.2H O Asbestos
|
|
heuretical
heurtical ; ..
Prismatic foyesuroe system Crystal system
Oy 40
OLFDOD PUD eepe
.
shougywad
atgew7 lemgenks, es higer suyyKEg Re
Grayish Grayish white Lovender qnte| -tudpus MPM au Po
Guo; YN Ss
PPK
puopsawyOuynho 61negative_z- Razil-Razil- and 110 2.5-4.0 . oyewseyuy .
* 3.2-3.3 |
fess
S
O
columnar UD
Monodinie
peyy Ash
TIDUS ir aE : pearly
3.0-912
oan
perfect Razial- negative_ez-
ety 110
negative_ez-
negative_ez-
i
O
, 1-5 Mg.Fe Mg.Fe
|. *
LamelorLamellor Prismatic
Oy
40 vou e
or brownbrown
|
1 to
x
Brown-
Brown-
co Somewhat Somewhat Vitreous
Vitreous 3.5-8.0
3.5-8.0 2.85-3.1 3.1-3.25
positive da
perfect
positivepositiveBiaxial paralle
HO
asbart- andand
Fibrous pseudo-
Moniclinic pseudo-
pseudo- orthorhombic~orthorhombic~
blue Gray Green Gren
MonoclinicMonoclinic ey
1AL
Lovender
blue
t-te
| _
SaRDBaw2.5-4.0
Peay
2.5-4.0 Apnea110 2.4-2.6es-Biaxial extinc ; positive Biaxial
| inclined
ters.jrtes
OMe
ee
Texture ma
vogriaterns
we:
~~.
inclinad
pleochroic
long
are
:
|
paral el
*
;
longcess
sens
2
pleochroit
pleochroit
1.7
aE bungy
CRMC-HT-TALC-000 130
RTE ES He as
SAT&Bs&
.
IRENE ree
Pathe:
chem
6
seed:
Na
alk! encima A
onc
mgoeasy a! iw
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Me
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4.25 .
$
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sary
te
Fibers Asbestos we
of A bestosAbestos FibersContinued Contiued Continued 3.75 voy poy 200g78 90
eR
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aN agers ear
Ter LMR ais
en
eaonp e
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orn
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svedtbesng. ERLITSserugsead faerybe/ayworgaty
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TAL-0C00131
aricionering
8-3-71
Dipintoaricionering miningInterior mal
Interior
- Mg Fe SiOH
natural Been colormonoclinicmagnum pilky
pilky fibrous
fibres brittlemoordwasmoordwas
Mg hack CuminatoritFeeimportantlyComme
,
ANTHOPYLITE
SNtn
erMe
asbestos 000120 oS
ASBESTINE
oo
-
ra
A alientmearketed
much French
in
CharctCerihsticasracteristicsao
Of grangs ASBESTOS : CHRYSOTILE MyO sigsig 2.0
materials name
grangs naturalling applied grangs a2 materials . Theprosiciful
to
variety
of
filsons
prosiciful
is CHRYSOTILE, a
silicate |, imagesimages images
Other commerciablone
CROCIDOLITE mogen , Complex AMOSITEAMOSI,TE CompCleoximplexr
ee oe eee eee ey eee
|
~ CRMC000121 7
Certain i
whichhave
a
a
filios
stretne
stretnestretne
rf
mineral entwistoerntwistort ChemicallyChemically
|
entwistort possesing are gangient hit - mulating qualitionqualitionand
bemulating
main
filons pin serpentines is amphiboles pCehrpeorsttivses amphiboles Amonite filsons proper cistinite candy eect
Chests
pin Amonite
wentwent and
gangient
the
proper is
is is
d^'ctice
tibilitytibilityibility the
candyShrappste
cistinitecistinite
filsons filsons onthophych onthophych
miners others sift As usedby by
|
&
any
Alan Magnesium nessive scist Pearly ericite ] works works works Loss LossLoss Loss state or
- wrotussis ,
Tice ,
Specific gravity fried 2.7Pearly Specific
2.7
.
|
re
a . wen
nineral 7 My3 TALCSTEATITESTEATITEL
SA4010
|
alteration ot Usually occurs as natural alteration . vw a adn
?
Steven riched distinction riched Steven barnets _ mopronimilicatenooksnooksonin metamorphosed metamorphosed - "
7
Steven
trosivefoliated may bebe
|
Called
!acets husterandheatMoshi
:|
TREMOLITE CarOn |
OH amphitile minte An
morselisicmorselisic -
Noually - minte . Occurs inboded CruptalsCruptals or
aggregates rocks cee enn ie | assocanted with metamorphic
gray
fibrous
fee
tt ae
aggregaties
=a
a