International Standard
,NTEANAT,ONAL

O,?GAN,ZAT,ON

FOR STANDARDIZATIONWdEH~YHAPO~HAR

OPrAHM3AL,MR

fl0 CTAH,lAPTWAlJ4M~RGANlSATlON

INTERNATIONALE

DE NORMALISATION

Graphical symbols for use on detailed maps, plans and
geological cross-sections
Part 6 : Representation
of contact rocks and rocks which
have undergone metasomatic,
pneumatolytic
or
hydrothermal
transformation
or transformation
by
weathering
Symboles graphiques B Miser sur les cartes, les plans et /es coupes g.Gologiques d&aill& - Pat-tie 6 : Uepr&entation des roches
de contact et des roches ayant subi one transformation m&asomatique, pneumatolytique ou hydrothermale ou une
transformation par alt&ation

First edition - 1 984-06-01

5

3
zz
40

UDC 528.94 : 553.22/.23 : 003.62
Descriptors

: geology,

maps,

drawings,

transverse

Ref. No. IS0 71 0/6-1 984 (Ei
sections,

schematic

representation,

symbols,

graphic symbols,


rocks.

K
8

Price based on 4 pages


Foreword
I S0

(the

national

I nternational
standards

Standards
interested
ri ght

is

carried

i n a subject

to be represented


and non-governmental,

Draft

I nternati onal

the member
the

I S0

throu gh

for whi ch
on that

for

member

Standardization)
bodies) .

I S0

technical

a technical

wi th


adopted

for approval

also take

by the

before

their

technical

i n the

of

I nternati onal
member

authorized

organizations,

part

acceptance


Every

has been

I nternational

I SO,

federati on

of developing

commi ttees.

committee

commi ttee.

i n liaison

i s a worl dwide

The work

body

has the

governmental


work.

com mittees

are ci rcu lated

as I nternati onal

Standards

to
by

Cou ncil .

Standard

and was

I t has been

I S0

71 0/6

ci rcu lated

approved

to the


by the

was developed
member

member

by Technical

bodies

bodies

Czechoslovakia

Au stri a

France

Bulgaria

Germany,

China

Poland

body


I nternati onal

expressed

Organization

Printed i n Switzerland

disapproval

i n October

of the fol l owi ng

Australia

N o member

0

ou t

(I S0

Standards

bodies

I nternational
Mi ni ng,


Organization

bodies

Committee

cou n tri es

U nited

Kingdom

Yugoslavia

docu m en t.

for Standardization,

:

Romania

F. R.

of the

I SO/TC

1 983.


1 994

0

82,


I NTERN ATI ONAL

Graphical

symbols

geological
Part

I S0

STAN DARD

for

use

cross-sections

undergone

of


contact

metasomatic,

hydrothermal

detailed

maps,

plans

and

rocks

which

(E)

-

6 : Representation

have

on

71 0/6-1 664


rocks

and

pneumatolytic

transformation

or

or

transformation

by

weathering

0

I ntroduction

I S0

71 0, a series of docu m ents

detailed

maps,


the fol l owi n g

2

plans
parts

on graphical

and geological

symbols

cross-secti on s,

General

for use on

The rocks dealt wi th

comprises

isochemical
rocks)

:

wi th

Part 1 : General

ru les of representation.

Part 2 : Representation

of sedimentary

or allochemical

allochthone

the

aureole

I n general,

rocks.

of magmatic

Part 4 : Representation

of metamorphic

Part 5 : Representation

of mi nerals.


Part 6 : Representation
have

undergone

Part 7 : Tectoni c

Scope

This

part

represent
wh ich

and

of I S0
on

of

71 0 provides

have originated

plan

or


as the

resu lt

rocks.

rocks

and

pneumatolytic

rocks

whi ch

or hydrother-

by weathering.

rocks
the

i n to

contact

b)


metasomatic;

c)

pneumatolytic

d)

weathering.

also take place wi thi n

existence

allochthone

by

to pneumatolytic
material

mol ecu lar

tran sform ati on

are identical

to

or


but there

d i ffu si on
These

at

are

elevated

processes

of transform ati on

particularly

processes

those

sericitisati on

advisable

3

application


of the

may

whi ch

of a serici tic

n o residue

have

is

produced

metamorphic

of a volcanic

rock,

schi st.

to use the symbol

when

a series of graphical
geological

resu l t

symbols

cross-secti on,

of contact

or hydrothermal

to

rocks

metamorphism,
tran sform ati on

fou r

grou ps

(see the table)

:

Principles

3. 1

facies;


for example,

I n su ch a case, i t

for the metamorphic

of the original

volcanic

rock

Basically,
the
for

of

representation

(see the

table)

General
the

various


symbols

characterization

the

serve

transform ati on

various

tran sform ati on
of the original

a)

contact

processes

rock.

hydrothermal

rock,

generally

or lesser degree


the

wh ich

is considered

by weathering.

are divided

i n the

either by

pure

transform ati on

au tohydration.

may lead to the form ati on

In
The symbols

by

are


i n tru si on .

wi th

form ed

and

i n a greater

refl ected

whi ch

they

remains.

pneumatolytic

or transform ati on

rocks

case
i. e.

rocks owe their

processes


Occasionally,

or tran sform ati on

field

some

wh ich

processes,

material

these

temperatures

symbols.

a map,

of metasomati c,

contact

metasomatic,

mal transform ati on


1

of

also

rocks.

(i n

of a magmatic

hydrothermal
Part 3 : Representation

i n thi s part of I S0 71 0 are form ed

processes

rock

to

represent

processes.

or interpretation


form i n g

form ed

n ot

by

intended

processes.

di fferen t

range from

rock to the form ati on

are

of genetic

processes,

can be seen wh ich

the rocks

They


sl ight

of a completely

degrees

of

weathering
new

rock.

metamorphi sm;
Therefore,

and

hydrothermal

symbols

have

been

-

representing


the

new

-

acting

additional

developed

with

a view

to

rock;

tran sform ati on ;

original

as an

symbol

whi ch


i s added

to

the

rock.

1


I S0

71 0/6-1 964

(El

Table
a)

1 01

Contact

rock

in

-


Symbols

Contact

rocks

1 04

general

Spotted

schist

888

1 02

Contact

1 05

quartzite

N odular

sch ist

-o--m--1 03


Contact

1 06

marble

bl

Metasomatic

H ornfels

transformation

Calcareous

c)

301

2

Pneumatolytic

an d

transformation

in


hydrothermal

Pneum atolytic

an d

hydrothermal

horn stone

processes

309

Kaolinisation

g eneral

302

Topazisation

31 0

Chloritisation

303

Tourmalinisation


31 1

Serpentinisation

304

Greisenisation

31 2

Montmorillonitisation

305

Silicification

31 3

Alunitisation


IS0 71 0/6-1 9&l (El

Table - Symbols
,-I
“I

Pnaalmatnlvtic
. . I
. . . -


.

.

-.

,

-.

-

(coI?c/UO’ed)

and hvdrothermal
__._

__,_._..._~

~~

Drocesses
.

(conclr/ded)

306

Propylitisation


31 4

Haematitisation

307

Saussuritisation

31 5

Carbonatisation

308

Sericitisation

d)
401

Weathering

processes

Weathering

L

3.2


Contact

rocks

(without allochthone material)

Contact rocks are the result of isochemical processes. The symbols therefore represent the new rock and are arranged
uniformly over the map, the plan or the geological section.
The symbols selected are a variation of the symbol for the
original rock (for example, contact marble) or else they seek to
give an idea of the appearance of the rock in question (for example, spotted schist or nodular schist).
When it is desired only to indicate that a rock mass is situated
within the contact zone of a plutonic rock, the general symbol
for a contact rock may be added to the symbol for the original
rock (see figure 1 ).

3.3
3.3.1

Rocks

resulting

Metasomatic

from

an allochemical

process


process

For rocks resulting from a metasomatic process, symbols are
used either to represent the rock.formed or else to characterize
the nature of the transformation process by adding the symbols
to those of the original rock.
As these transformation processes, most of which take place
within the aureole of a magmatic intrusion, do not result in an
oriented texture but rather cause the existing texture to disappear, the symbols are arranged without any orientation.
In the symbols which represent the new rock formed, the
elements are also arranged without any orientation but in alternate lines (see figure 2).

Figure 2 - Adinole
In the others, the symbol characterizing the transformation process is distributed at irregular intervals over the symbol for the
original rock (see figure 3).

Figure 1 - Contact rock

Figure 3 - Skarnification

in limestone

3


I S0

71 0/6-1 964


(E)

3. 3. 2

Pneu matolytic

Rocks

wh ich

hydrothermal
use

may

symbol

to

have

process

a separate

decided

and

for


additional

ori ginal

To characterize

the natu re

been standardized

mati on

are u sed.

distri bu ti on

method

These,
density

of expressing

each

processes

from


a
that

one.

symbols

It

pneumatolytic

or

i t is impossible

has

wh ich

therefore

are added

to

been
to

the


Figu re

of the process,
for minerals

too,

form ed

are arranged

of the

additional

the degree

symbols

wh ich

have

du ring

tran sfor-

at irregu lar

intervals.


symbols

of mineralization

provides

3. 4

Only one symbol
a

(see fi gu res

as

an

addi tional

starti ng

from

Other than

purpose

Slight


tou rmali ni sation

greisenisation

in

granite

of

sch i st

Weathering

a mineral

4 -

Advanced
argillaceous

4 and 5) .

Fi gu re

5 -

rock.

already


The

resul ted

are so nu merou s

symbol

devise

for the

hydrotherm al

Figure

the

will

be used for weathering;

symbol.
earth’s

the origi nal

This


6 -

a system

Form ati on

th i s can be u sed

represents

infl u ences

su rface.

rock,

the concentrati on

as a resu l t of weathering
only

symbol

of abbreviations

of

or form ati on

can be indicated,


kaolinite

i s used

in

clay

by

of

but for thi s

(see fi gu re

weathering

6) .