Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf ·...

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(Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene mineral assemblage in Hosh Skarns, west of Taft (Yazd) M. Rahgoshay 1 , M. Mackizadeh 2 , T. Amoii Ardekani 1 , H. Shafaii Moghadam 3 1-Earth Sciences Faculty, Shahid Beheshti University, Tehran, Iran 2-Department of Geology, Faculty of Sciences, Isfahan, Iran 3- School of Earth Sciences, Damgan university of basic Scince, Damgan, Iran E-mail: [email protected] Abstract: The injection of I-type granitoid bodies (Hosh intrusion) with calc-alkaline affinity into Lower Cretaceous limestones (Taft Formation) has produced the various types of related skarns and marbles. Thereby, those skarns formed can be undoubtedly divided into four groups, clinopyroxene-plagioclase skarns, clinopyroxene skarns, clinopyroxene- vesuvianite skarns and moreover garnet skarns. Additionally, calc-silicate bearing marbles also show an especial mineral assemblage consisting of olivine, clinopyrocxene, garnet and vesuvianite. Based upon geochemical studies, two types of garnet can be distinguished in these skarns. The first, Type is the garnets with grossular composition in which they are found with calc- silicate assemblages in skarns and the second, Type is the garnets with andradite composition present in garnet skarns. Clinopyroxenes in those skarns feature a composition varying between Ca-rich diopsides, salite and fassaite. Based on the chemical composition of the intrusive body and the related skarns, one can conclude the close relationship of these skarns with Cu and Zn skarns. Keywords: Skarn, Marble, Granitoids, Mineral Geochemistry, Garnet, Clinopyroxene, Olivine, Vesuvianite. Vol. 16, No. 1, Spring 1387/2008 Downloaded from ijcm.ir at 6:30 +0330 on Wednesday February 12th 2020

Transcript of Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf ·...

Page 1: Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf · (Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene

(Received:11/9/2006, in revised form:5/7/2007)

Geochemical study of garnet-vesuvianite-wollastonite-pyroxene mineral assemblage in Hosh Skarns, west of Taft (Yazd)

M. Rahgoshay1, M. Mackizadeh2, T. Amoii Ardekani1, H. Shafaii Moghadam3

1-Earth Sciences Faculty, Shahid Beheshti University, Tehran, Iran 2-Department of Geology, Faculty of Sciences, Isfahan, Iran

3- School of Earth Sciences, Damgan university of basic Scince, Damgan, Iran E-mail: [email protected]

Abstract: The injection of I-type granitoid bodies (Hosh intrusion) with calc-alkaline affinity into Lower Cretaceous limestones (Taft Formation) has produced the various types of related skarns and marbles. Thereby, those skarns formed can be undoubtedly divided into four groups, clinopyroxene-plagioclase skarns, clinopyroxene skarns, clinopyroxene- vesuvianite skarns and moreover garnet skarns. Additionally, calc-silicate bearing marbles also show an especial mineral assemblage consisting of olivine, clinopyrocxene, garnet and vesuvianite. Based upon geochemical studies, two types of garnet can be distinguished in these skarns. The first, Type is the garnets with grossular composition in which they are found with calc-silicate assemblages in skarns and the second, Type is the garnets with andradite composition present in garnet skarns. Clinopyroxenes in those skarns feature a composition varying between Ca-rich diopsides, salite and fassaite. Based on the chemical composition of the intrusive body and the related skarns, one can conclude the close relationship of these skarns with Cu and Zn skarns.

Keywords: Skarn, Marble, Granitoids, Mineral Geochemistry, Garnet, Clinopyroxene, Olivine, Vesuvianite.

Vol. 16, No. 1, Spring 1387/2008

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Page 2: Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf · (Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene

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Page 7: Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf · (Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene

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Page 8: Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf · (Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene

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Rock intrusion intrusion intrusion intrusion intrusion intrusion intrusion intrusion Aplite Sample TM.1 S.27 HO.28 HO.123 T.1 T.2 T.3 T.4 D.1

SiO2 ���/�� 8��/�� ���/�m ��n/�� �82/�n 8�n/�n �88/�m �nn/�n 2/�� Al2O3 mm2/�� n��/�2 mn�/�2 2n�/�2 8n2/�m �on/�8 �m�/�8 om�/�m nn�/�� FeO(t) 8n�/8 ��8/m o��/m �m�/8 8�/2 ��n/m ��2/m m�n/m 8o�/oMgO 8�2/2 8��/8 �n�/2 o��/8 nn/� �o2/2 ��m/� �8n/� o��/oCaO ��n/m mm2/m 2��/� 8m8/m �8�/n �om/m �n�/m �om/m n�8/oNa2O 8��/2 �o�/2 o�/8 ���/2 �m�/2 ���/8 mm�/8 8��/8 2m8/2K2O 88m/n �m�/2 �22/2 o82/8 ���/m o��/8 2�/8 o8�/8 ���/�MnO ���/o ��2/o o��/o o��/o o88/o o�n/o o��/o o�/o oo�/oTiO2 88�/o nn�/o m��/o n�8/o m��/o �n�/o �n�/o n��/o ���/oP2O5 o��/o 2�8/o ��n/o �mn/o �n�/o 8m�/o 8m�/o ���/o o2�/oTotal ���/�� ���/�� oo8/�� ���/�� �2�/�� �8�/�� o8�/�� �2n/�� �2m/��

Ni �/m �/� m/n �/� 2/�m �/�8 8/�m �/�2 �/�8 Rb �/�mn n/�n �/�� 2/�8 �/�� �/�� �/�m �/�n �/2o2 Sr n/��� �/��� �/2�� m/2o� �/88m �/2�o 8/2�2 �/2�� n/�mo Y n/82 �/8o 8/8� �/2� n/�� �/�2 2/�8 �/�m �/2� Cr m/�n �/�o� m/�n n/�2 8/�o� �/��� �/��� �/��� �/�28 Zr �/�8 �� �/�2 �/�� 2/��2 �/�nn �/�nn 2/�nm �/��� Nb 2/� � �/� 8/� �/�o �/n �/n 2/� �/�� Ba ��n �/8�� 2/2mn �/m82 n�� 8/n�2 n/n�2 �/m�� �/��o La �/o 8/8 m/8 �/� �/88 �/28 �/28 �/8� �/�� Ce 2/�o �/8� �/2� 8/m� m/�� n/�� �/�2 �/�m �� Yb 2/o 2/o 2/o 2/o �/� �/� �/� �/� �/�Eu 2/o 2/o 2/o 2/o n/o �/� 2/� n/� 2/oSc �/�8 �/�� �/�� �/�� �/� 2/�� �o �/� �V �/�mo n/��8 2/�nn �/��o �/nn �/�� n/�� �/�o �o Pb 2o n/�� 8/� �/� n/�o �/m �/��2 2/�o m/8m Cu �/��2 m/2o m/�8 nm �/m� �/m 8�m �/8� �/8� Co 8 2/� �/2 �/2 8 �/n m/m m 8Zn �m� �/�� �/mn 8/n� 8� 8/�o �/m� �/�� �/2m Mo �/o �/o �/o � 8/2 � n/� �/o n/�Th �/� �/o � 2/o �/� � � � n/�m

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Page 9: Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf · (Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene

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Skarn Type Fe Au Cu Zn SiO2 8/n� m/�� �/�m �/��

Al2O3 �/�� 2/�� �� 8/�mTiO2 �/o �/o n/o m/oFe2O3 �/2 �/2 n/2 �/�FeO n/m �/8 m/2 8/�MnO �/o �/o �/o �/oCaO 2/� �/n �/8 2/8MgO 8 2/8 �/� �K2O �/2 n/2 �/8 �/�Na2O m �/8 m 8P2O5 8/o 2/o 8/o 2/o

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Page 10: Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf · (Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene

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F�3G<E, �!:?�����B �����15 �� �C.Sample SiO2 TiO2 Al2O3 Cr2O3 FeOt MnO MgO CaO Na2O Cl

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Sample FeOcalc Fe2O3cal TSi TAl Sum_T AlVI Fe3 Ti Cr Sum_A

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Sample Fe2 Mg Mn Ca Na Sum_B Cl Alm And Gross � m�8/o �m�/o oo�/o ��8/n oon/o m2�/� oo�/o ���/� on�/�8 8��/�� 2 ��/o om�/o o�2/o �n�/n o��/o �8�/� oo�/o mom/�2 on2/2� n��/n� 8 n�n/o �28/o o28/o ��m/n o n�m/� oo�/o n�2/� ���/�� n2n/�2 m 8m8/o oo�/o om�/o o2�/� oo�/o m2�/� o 8m2/n �/� �nm/�m n ��/o o��/o o8�/o o��/� oon/o �on/� oo�/o �m2/�o n�8/2� �n�/�� � ���/o om�/o o2�/o ���/n o ��m/� o�/o ��2/�2 n�8/2� �nn/n� � ��8/o omm/o o��/o �m�/n oo�/o �n�/� o m��/�� ���/2m m�m/�� � ���/o o��/o o8�/o �n�/n oo�/o �8�/� o m�/�2 ���/2� ���/n�

Sample Pyrope Spess Uvaro � ���/2 �on/o o2 ��m/o ���/o 8�2/o8 ��2/� 2n�/o om o��/o ��m/o on ���/o m�/o o� ��n/o 8��/o 2��/o� �m2/o ��2/o 8��/o� ���/o n�/o o

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Page 11: Geochemical study of garnet-vesuvianite-wollastonite ...ijcm.ir/article-1-648-fa.pdf · (Received:11/9/2006, in revised form:5/7/2007) Geochemical study of garnet-vesuvianite-wollastonite-pyroxene

����B ��'��I X0.WP� �W'(.AT XZ��[���'��<<,<��'�.#5u<��� +�I<!':... ��

F�3GE���J'?EDS �L���B B �� �LC ���1L5 �L��� �LC)Alm=Almandine; Gross=Grossular; And=Andradite; Uvaro= Uvarovite;

Spess=Spessartine(Number SiO2 Al2O3 FeOt CaO FeOcalc Fe2O3calc TSi Sum_T

� 8n/mo o2/m ��/2m ��/8o ���/� ���/28 ��m/� ��m/�2 nn/8� m�/8 m�/2� n/8o ��/� �2�/2n n��/� n��/�8 �2/8� 2n/8 2�/2� nn/8o 2�2/� �m�/2� 88�/� 88�/�m m�/8� 2�/8 8�/2� ��/2� 22�/� �8�/2n n�2/� n�2/�n ��/8� m/8 o�/2� �n/2� 2��/� �o�/2n ��8/� ��8/�� 8� ��/8 �/2� 2�/8o 2m2/� 2�2/2� no�/� no�/�� �/8� 8�/8 n�/2� ��/8� ��n/� 28m/2n m��/� m��/�� mm/8� �n/8 mn/2� 2�/8o 28n/� o��/2� mon/� mon/�� ��/8� 82/8 �2/2� �m/8o 22/� �n�/2� m��/� m��/�

�o 8/mo ��/8 �8/2m o�/8� ���/� n��/28 ���/� ���/��� �2/8� 8/m o�/2� �/2� ��8/� �n�/2m �2�/� �2�/��2 ��/8� ��/m �/2n ��/2� ���/� no2/2m n�2/� n�2/�

AlVI Fe3 Sum_A Fe2 Ca Sum_B Alm And Gross ��8/o �8�/2 �2/8 �nn/o mn�/n �o�/n ���/2 �n/�� 2��/�� ��8/o �m�/8 �2n/8 ���/o m8m/n n��/n �n�/2 �8�/�2 ��2/�m �m/o 8�8/8 o�8/m ���/o m��/n �m�/n �m�/8 o�/�m ��8/�2

�m2/o 2n�/8 ��m/8 ���/o 8n8/n n2m/n �o2/8 no�/�8 8��/�8 ���/o 22�/8 ���/8 ��/o 88/n m��/n o��/8 �8�/�2 o��/�m �2�/o 2��/8 ���/8 ��8/o mo2/n n�n/n �o�/8 ���/�8 �om/�2 ��2/o �nm/8 ���/8 ���/o nn�/n ���/n �o�/2 �n�/�2 m8�/�m �nn/o 2�n/8 o2�/m ��2/o mo2/n n�m/n o��/8 2�2/�� �o�/�n �n�/o 22�/8 ���/8 ��/o m��/n �n�/n oon/8 ���/�8 ��n/�8 �8�/o �82/2 ���/8 �nn/o no�/n ��8/n �2�/2 ���/�� 8�n/�� �m/o o��/8 �8/8 ��8/o 2�2/n mmm/n ��/2 ��2/�� 8��/��

��8/o on2/8 ���/8 ���/o 8o�/n m�2/n �mn/2 ��/�� o�n/2o

@#�KI!" '/I ^':.6'+�I<!�C@�����15 �� �._.� @��[6� .����B�C@�����15 �� �._.� @��[6� )� �% ) !WCL5 N��I !*'/'��"�1 ( � �@I!"')�.% !�.5 !B ^)w%!� (��F �������B �C@#���B �� �._.� '��C) �)!( � �@I!" '� �&�J ^�&6#�C .

Clinoenstatite ClinoferrosillitePigeonite

Augite

Diopside Hedenbergite

En Fs

Wo

Gross And

Pyrope+Alm+Spess

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�)� , �1� �@�$*C� -&�� �A�3( ����I�� �A.W0 �

F�3GK�'*��'���J +'?ICP-Ms !% @Z"''WI !4�60 +'����B l� �� �C@�����;5 ����B.Element Value Element Value Element Value Element Value

Ba �/��� Ta �/o Nd m/2� Lu 2�/oBe 8 Th �/� Sm m/m Mo 8/2Co 2� U 8/� Eu 2�/� Cu �m Cs �/o V �� Gd ��/8 Pb �/�o Ga m/�m W �/8�� Tb �8/o Zn �o� Hf m/2 Zr n/�� Dy ��/8 Ni �/�Nb �/� Y m/2o Ho ��/o As 2/m�� Rb �/�8 La �/8� Er ��/� Cd �/oSn �2 Ce �/�� Tm 2�/o Sb �/nSr n/22� Pr o�/� Yb �8/� Bi �/�� Ag 2/�n Au �/�m8 Hg o2/o Se n/o

2�/I':.6'+�I<!�C:I!"'/I ^':.6'+�I<!{��.W0 �Cb �� '���:.'&�C@6`��/I , '� < U'?��5 '�� � !]�B'�!)O1(n.({u.WZ� ? �%7Al2O3/I ��#d�5 �� ':.6'+�I<!�C��'� ?MgO,CaO <SiO27C�I ��F �� �#��� �I '� ?

FeO <TiO2 ? $� �� ��$� �&6C� .d!%�, /I':.6'+�I<! �C))��W(�C@��<��h<&_ �� �( � �@

����u�% !@Al2O3� ��J �% ) !WC �I )�.% '� ?FeO �'? ? 7?'� < �#� �x�� Fe+2 Fe+3/�'� �% �x�� ?!*

/I':.6'+�I<!u�% �C�5.I!"' ^/I +':.6'+�I<! �%�$� �CI!"'A�5� ^'��5 ]��[.d!%��/I , !*':.6'+�I<! �C

))��W(�C@2o<2�( ? N$�� �� '� ?MnO<?'� ��� &��FeO� ��$� �&6C� . ��/I +':.6'+�I<!���� �C!

MgO �CaO�<&F �" <@Al2O3<SiO27C�I �#�&� . !% )<S0� +'� ?Fe+2%'���� , !#$!Fe+3 �5 . !%�6%+

�����}0 !@����:�.���C._ '�)Johansonite ( <T!x�&C�)Hedenbergite ( ��: +'+�I<! u�% �#x�� �C

#�C&6. �� !( ���F +F f'��!"u�% @ !% @1$" '���J O� �#!B !s� ����.(]��[.(.AT !s� , 'W'��I!" ' ^+

/I':.6'+�I<!/I �%�$� �C':.6'+�I<!�C@�� �._.� �����15 @c��5 .

8�TS: �C,SI. :TS:{u.WZ� �C,SI. �� �����15 @/I':.6'+�I<! �TS:,SI.)�����15 <&� (I!" < �#( � �._<'^

J{��.W0 ��� �� D!#�Bx�J'�)�%�o�"�2%x�J'�(�#!B � !] <�'{u.WZ� ���J ,."�< � ?% &F �� ', 7�/o%�5 )h<&_�.(

��1$" �I �3B � ."'��I O��C@���15 � �� �<, +)�����15 <&� ( e0�% ?7!4�60 @&5 &6��� �WB�� �� U@

]�%�� )&��� ��.(�, !&5 �I�_ UC�*��#d�5 �� ���I '��@���15 ��� &� .&5 wWP" ���WB�� �� U@]�% ��� )&���

���15 <&� � �C�^x5 &� ."����!B�@&51$" < U'x�J O'��C@�.��.� .(�.m�+35 :�� ��C@ � � �����15 <&� �� +35 @���� {�#x�� !

u�%�, Al2O3<FeO &6#�C .? �% ) !WC u.WZ� 7Al <Fe� �'� ?Ti+35 $C�I �C�� ��$� � �^x5 �% �I &C��_?*6�Al <Fe�_ �% @Ti �5 )h<&_�.(n��.#5u< '�: ��I +�{u.WZ� ��W" �� ������15 @��.�

�� � �._< �Z��[� .�'� ?CaO �.#5u< +'u�% �#x�� ��#�5.�'� ?FeO �.#5u< +'�9#� �C'R�� < !'?��F �� )�.% ��I�'� ?MgO�<&F �" @u�% �5)h<&_�.(��<<,< ��'�:� .60 �%1���I , ��C@/4 �1$" '&6C� OD

�����15 @/I':.6'+�I<! –����B �<<,<��' � � �@�'� ? u�%�, TiO2<CaO &6#�C)h<&_�o.(

��3�J '% < h.x'".'�: ��I <� +��." �� DG.3� @�[6� �% ���I M�.4��C@0! �&�� � �._< .I!"'3�J ^'h.xb �� �C'�

#I '�.6'&6/x��.C �� � !]�B'&�! .%'".'��� �CD!#�B�J'��:.B./'��#( � � !]� <'� ?Al(IV)A�: ���J '+�5 .�'� ?

XFe % +'".'�9" �C''" !�%'+m�/o�"m�/o� ��$� ��&C�)h<&_��.(

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����B ��'��I X0.WP� �W'(.AT XZ��[���'��<<,<��'�.#5u<��� +�I<!':... ��

F�3G L"I!'( ^'W'��/I':.6'���15 <&� �� +�I<!�C@�Z��[� ��.� .Number � 2 8 m n � �

Na2O om�/o oom/o on�/o o�8/o o��/o �m�/o oSiO2 o��/nn �m8/nm 2n2/nm 2�8/nm �mm/nn ���/nm �8�/nn K2O o��/o o o22/o oo�/o o o��/o oCaO n�/2n n��/2n 2�/2n ���/2m on�/2� �m�/2n m�/2� TiO2 o o o��/o o�2/o o oon/o om2/oCr2O3 o8n/o o��/o o ��m/o o o�/o oMnO mn8/o 8��/o n�/o m��/o n8�/o mn�/o m�n/oFeO o8�/� �28/� 282/2 8�m/2 �22/� nn�/2 ���/oMgO ���/�� ���/�� o�n/�� o��/�� 8��/�� ��n/�n 8�2/�� Al2O3 2��/o 2�2/� mo�/o 8�2/o mm2/o n�2/o 2m�/oTotal ���/�� ��m/�� �2�/�� mmm/�� m�n/�oo o�2/�oo m��/�oo Na oo8/o o oom/o oo�/o oon/o o�/o oSi oo�/2 ��8/� oom/2 ���/� oo8/2 oo�/2 ��2/�K oo�/o o oo�/o o o oo�/o oCa ���/o oom/� ���/o ���/o o�m/o oo�/� o2n/�Ti o o oo2/o o o o oo�/�Cr oo�/o oo�/o o oo8/o o oo2/o oMn o�m/o o�/o o��/o o�n/o o��/o o�m/o o�n/o

Fe+3 (T) o o o o o o oFe+3 (M1) o o o o o o oo8/o

Fe+2 o82/o o8m/o o��/o o�n/o onn/o o��/o o2�/oMg �88/o ��8/o ���/o ��n/o ���/o ��/o �88/o

Al (T) o o��/o o oo8/o o o oo�/oAl (M1) o��/o o8�/o o��/o o�m/o o��/o o2n/o oo8/o

Total m m m m m m m

Number � � �o �� �2 �8 �m Na2O o o�/o o��/o o2�/o o o��/o oSiO2 �2m/nm m�2/n8 o��/nn 2m�/n8 m��/nm m�m/nm ���/nm K2O o o o8/o o o oo�/o oo2/oCaO 8��/2� �88/2n ��8/2� �8�/2n o��/2 �/2n �m2/2n TiO2 on�/o ��n/o ��2/o mmm/o o�/o o�8/o oCr2O3 o o o8n/o o omm/o o omm/oMnO m2�/o �nm/o mn�/o m��/o 82/o ��8/o 2n/oFeO ��n/� �o8/2 ��/� m�n/2 �/o o��/� n��/oMgO o��/�� �n8/�n 82/�� �m�/�n ���/�� o�n/�� ���/�� Al2O3 m�/o 8/� m��/o mn�/2 nm2/o 8�m/o mm�/oTotal m�m/�oo 2o�/�oo o��/�o� no�/�oo nmn/�� �2�/�� ���/�� Na o oon/o oo�/o oo2/o o oo�/o oSi ���/� �nn/� �m�/� �8�/� ���/� ���/� ��/�K o o oo�/o o o o oCa o22/� o�2/� om�/� oom/� o��/� o�2/� oo�/�Ti oo2/o oon/o oo8/o o�2/o oo2/o oo2/o oCr o o oo�/o o oo�/o o oo�/oMn o�8/o o28/o o�m/o o�n/o o�/o o2�/o oo�/o

Fe+3 (T) o o o88/o o o o oFe+3 (M1) oo�/o o2�/o oom/o o o oo�/o o

Fe+2 o82/o on�/o o o�n/o o2m/o o2m/o o��/oMg �2�/o �n�/o �2�/o �m�/o �8n/o �2�/o �n�/o

Al (T) o�8/o omn/o ��/o o�2/o o�m/o o�m/o o�/oAl (M1) oo�/o o��/o o om8/o o�/o oo8/o oo�/o

Total m m m m m m m

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�)� , �1� �@�$*C� -&�� �A�3( ����I�� �A.W0 ��

F�3G ?�$�$LNumber �n �� �� �� �� 2o 2�

Na2O o o oo�/o o2m/o om2/o ���/o �mm/oSiO2 ���/nm ��/n8 �n/n8 ���/m� 2��/m� n�/n� ��2/no K2O o�2/o o o�m/o o o��/o o2/o oCaO o�2/2� �2�/2n o8�/2� nm2/2n ���/2n o8�/2m ��8/2m TiO2 o8n/o o�n/o on8/o ���/o ���/o o oCr2O3 o�/o on8/o o o8n/o o8n/o o��/o o��/oMnO 8��/o ���/o ��n/o o o o��/� ���/�FeO �8�/o 2�8/� ��n/o �m�/8 8n�/8 2��/�o m�2/�MgO 8�2/�� 28�/�� m�8/�� ��2/�2 �o�/�8 om�/�� ��n/�o Al2O3 8n�/o �n/� �on/o 2�8/� �8/� ���/o 22n/oTotal �8n/�� ��2/�� �m/�� ���/�oo ���/�oo �o�/�� 2��/�� Na o o o oo2/o oo8/o o�m/o o��/oSi ��/� �m�/� ���/� �m�/� ��2/� �n�/� �m2/�K oo�/o o oo�/o o oo�/o oo�/o oCa o�n/� ���/o o��/� oo8/� o�8/� o��/� o88/�Ti oo�/o oo2/o oo�/o o22/o o��/o o oCr oo2/o oo2/o o oo�/o oo�/o oo�/o oo8/oMn o��/o oon/o oo�/o o o o8n/o onn/o

Fe+3 (T) o o o o o o88/o om�/oFe+3 (M1) oo�/o o2m/o o2m/o o�/o onm/o on�/o o��/o

Fe+2 o2�/o o�n/o o o��/o om�/o 2mm/o 2o8/oMg �m8/o �88/o �m�/o �o8/o �m8/o �8�/o �2�/o

Al (T) o�/o on2/o o88/o 2�2/o 2o�/o oo�/o o�/oAl (M1) oon/o o28/o oo�/o �m�/o ���/o o o

Total m m m m m m m

F�3GMI!"'TS: ^���15 <&� �� �C,SI.�C.Number � 2 8 m

Na2O 2m/�o 8�n/�o �m8/�o n2�/�o SiO2 8n/�n �8�/�� �n2/�� ��8/�n Cl o�/o o2�/o o2�/o o�/o

K2O o�2/o o��/o �8m/o �nm/oCaO ���/� 8�m/� nn2/� 2�8/�TiO2 o22/o om�/o o oCr2O3 o o o oMnO o2�/o o o o��/oFeO o�n/o om2/o oom/o o22/oMgO o o2�/o o�/o oo�/oAl2O3 ��/2o ���/�� 22�/2o 22�/2o Total 2�2/�� 8�/�� ��2/�� 2�m/�� Na n�2/8 ��m/8 n��/8 �om/8Si 82�/�� �2m/�� ���/�� ���/�� Cl oo8/o oo�/o oo�/o oo8/oK o��/o 22/o o8/o o8n/oCa 88�/o 2nm/o 2��/o 2m�/oTi oo8/o oo�/o o oCr o o o oMn oom/o o o o�8/oFe o�m/o oo�/o ooon/o oo8/oMg o oo�/o oo2/o oo2/oAl 8m2/m 22�/m 2��/m 8om/m

Total �8�/�� �mm/�� ��n/�� ��8/��

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����B ��'��I X0.WP� �W'(.AT XZ��[���'��<<,<��'�.#5u<��� +�I<!':... ��

F�3GNI!" '( ^'W'��+35 ���15 <&� �� �C�C.

Number � 2 8Na2O o��/o o oSiO2 ���/2� �m�/2� o��/2� Cl o�m/o o��/o o

K2O o o oCaO m�/2� ���/2� 228/2� TiO2 2n�/8� ���/8� ��8/8� Cr2O3 o2�/o o o�2/oMnO o�n/o o om/oFeO mo2/� n28/� �2m/�MgO o8�/o oo8/o o��/oAl2O3 ���/o 2on/� ���/�Total �m�/�n n�8/�� ���/�� Na oo�m/o o oSi �/8 �8�/8 o�/mCl oo2/o oom/o oK o o oCa ��/8 �/m n�8/8Ti ��/8 ��/8 �2/8Cr oo�/o o oo�/oMn oo�/o o oom/oFe nn/� ��/o ���/oMg oo�/o oon/o o�8/oAl �8�/o ���/o ��m/o

Total ��8m/�2 ��8/�2 ���/��

F�3GOI!" '( ^'W'���.#5u< '������15 �� �C@�Z��[� ��.� .Number � 2 8 m n

Na2O o8m/o o o oo8/o oSiO2 �nm/n� ��8/n� �n�/n� ���/n� ���/n� Cl oon/o o��/o o o��/o o

K2O o22/o oom/o o o o��/oCaO o8�/m� ��/m� nm�/m� o�/m� 88�/m� TiO2 o ��2/o �n2/o on/o o��/oCr2O3 o oo�/o o o oMnO o��/o o2�/o o�n/o onm/o o2n/oFeO o�n/o �n�/o o om/o o�8/oMgO ���/o �nm/o �n�/o 22�/o 2o�/oAl2O3 �/o 22�/o �n�/o on�/o on�/oTotal 8�n/�oo �o8/�oo om/�o� ��m/�oo �2�/�oo Na oo�/o o o ooo�/o oSi ��n/n ��n/n ��/n ��8/n ���/nCl ooo�/o oo8/o o oo8/o oK oo2/o ooon/o o o o2/oCa �8�/n ���/n ��8/n �m�/n ���/nTi o o�8/o o�/o oom/o oo�/oCr o ooo�/o o o oMn oon/o oo2/o oo�/o oon/o oo2/oFe oo�/o o�8/o o o8�/o ooo�/oMg o2�/o o2/o ooon/o o8�/o o8m/oAl o�2/o o2�/o o2/o oo�/o oo�/o

Total ��on/�� ����/�� ���2/�� ��n�/�� oon�/�2

F�3G ?�$�$ONumber � � � � �o ��

Na2O o8m/o o8�/o o8m/o o��/o on/o o�8/oSiO2 8�2/n2 8�/n� ���/n� o�n/n2 �82/n� �8�/n� Cl oo2/o o o�2/o o oo2/o on�/o

K2O onn/o o o�/o o onn/o o�2/oCaO m8�/m� o82/m� on8/m� �/m� 2�n/m� 2�n/m� TiO2 o8�/o o�n/o o�2/o o8�/o om�/o o�/oCr2O3 o��/o o2�/o o o8n/o o on8/oMnO on�/o onm/o o��/o o�2/o �m�/o oFeO o �m2/o �o�/o omm/o o�/o ��m/oMgO 2mn/o �mm/o 22�/o ���/o 28m/o �m�/oAl2O3 �/o �2�/o �m/o o�2/o �n�/o �8m/oTotal mo2/�o� o��/�oo m82/�oo 2�/�oo ���/�� �n�/�� Na oo�/o oo�/o oo�n/o oo8/o o��/o o�8/oSi ��/n ��2/n ��m/n oo�/� on�/� ���/nCl ooo8/o o oo2/o o ooo8/o oo�/oK oo�/o o oo�8/o o oo�/o o��/oCa �8n/n ��n/n �m�/n ��8/n �on/n �n2/nTi oo8�/o oon/o oo�/o oo8/o oom/o oo�/oCr oon/o oo2/o o oo8/o o o�/oMn oon/o oon/o oo�/o oo�/o o�8/o oFe o o�8/o o�/o oom/o oo�/o o�/oMg om�/o o2m/o o8�/o o8m/o om/o o2m/oAl o�8/o o��/o o��/o oo�/o ooo�/o o��/o

Total oo�m/�2 o22n/�2 o���/�2 ��2m/�� �mm2/�� ����/��

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�)� , �1� �@�$*C� -&�� �A�3( ����I�� �A.W0 ��

F�3G5PI!" '( ^'W'��<<,< ��'���15 �� �C���@�Z��[� ��.� .Number � 2 8 m n

Na2O o om�/o o��/o o��/o oo�/oSiO2 ���/8� 8��/8� ���/8� m82/8� ��m/8n Cl o�/o o��/o o��/o on�/o on�/o

K2O oom/o o2�/o om�/o om2/o o8�/oCaO ��8/8n o�n/8n m��/8� ���/8n �o�/8� TiO2 o��/� o��/� ���/� ���/o �8�/�Cr2O3 o o��/o o o o2�/oMnO o o�/o o��/o �o�/o oFeO 8o�/m 2��/m 2mm/m ��/8 �2�/mMgO on2/m on�/m ���/8 ���/m ���/8Al2O3 �on/�m 8�m/�n �82/�m �8�/�8 88�/�m Total ���/�� n��/�� �o8/�� om�/�n �2m/�n Na o om2/o nm�/o o��/o oo�/oSi ��/�� mnm/�� ���/�� �n/�� n��/�� Cl o��/o o��/o o�8/o o8�/o o8�/oK oo2/o o��/o oo8/o o2n/o o��/oCa n�/�� m��/�� 8o�/�� �n�/�� o�8/2o Ti m�8/o m��/o mn2/o 8�2/o m8n/oCr o oo�/o o o oo�/oMn o o8/o oo8/o o8�/o oFe �o�/� ���/� �o2/� ���/� ��/�Mg o�2/8 on/8 ��8/2 2n8/8 on/8Al ���/� o�/� �8/� 28�/� �2�/�

F�3G ?�$�$5PNumber � � � � �o ��

Na2O o o8m/o on/o o o oo�/oSiO2 mm�/8� o8�/8� on8/8� ��/8n o8/8� o�n/8�Cl ��2/o �� ��/o o��/o o�8/o o�n/o

K2O o oo�/o o8�/o o o o�m/oCaO n�m/8n n8�/8n �8/8n mn�/8� m2/8� 2mm/8�TiO2 2�m/� ��8/� �m�/o ��m/o �o2/o �8�/oCr2O3 oo�/o o o o o oo�/oMnO �o2/o o2�/o 2mn/o om/o 282/o 2m�/oFeO ���/m �2�/m 8n�/m 28�/m �m�/m n28/mMgO oo�/m ���/8 �m8/m �8�/m n28/m mon/mAl2O3 2��/�m �o8/�m ���/�2 �m�/�2 �m2/�2 �88/�2Total �22/�� m28/�n ���/�m om2/�� ��2/�n o�8/�nNa o o8�/o o8�/o o o oo�/oSi �m2/�� n��/�� ��8/�� �/�� �/�� ��/��Cl o�2/o o�2/o o�2/o o�8/o o�/o o8�/oK o oom/o m�/2o o o oo�/oCa no8/�� �n�/�� 2��/o m�/2o 2n/2o 8�/2oTi m�2/o m�2/o o�n/o 2n/o 8/o 8�/oCr oo2/o o o o o oo8/oMn om8/o oo�/o o�n/o o�n/o o�/o o�m/oFe �2/2 ��/� �2�/� �n/� 2/2 �n/�Mg omn/8 om2/8 ��2/8 ��/8 m8/8 m8/8Al n2�/� ���/� �/� �/� �/� �8/�

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F�3G55I!" '( ^'W'��3�J '% < h.x'".'G.3� )�." �� �@��[6� .Sample Mineral SiO2 TiO2 Al2O3 FeO Cr2O3 MnO MgO

� amphibole ��8�/m� �8��/o ���2/m 28��/�n ooo2/o �no2/o �n��/�82 amphibole om88/no �28�/o n���/m nn�n/�n ooo2/o m�m/o ��2/�2

Sample CaO Na2O K2O Total TSi TAl Sum-T CAl � ��8m/�o �2mm/� mn��/o �m�2/�� m28/� n��/o � 2��/o2 nm8�/�o ���8/� 8���/o 88�m/�� n��/� m�8/o � 8��/o

Sample CTi CMg CFe2 Sum-C BFe2 BMn BCa Sum-B � o�m/o ���/2 ���/� n ��n/o �o�/o �o�/� 22 o�2/o ���/2 ��m/� n 2m/o o�8/o ���/� 2

Sample ANa AK Sum-A Sum-cat. � 82m/o o��/o m��/o m��/�n2 8m�/o o��/o m��/o m��/�n

Sample Mineral SiO2 TiO2 Al2O3 Cr2O3 FeO MnO MgO � Biotite �nm�/8� 2o2�/m nmn�/�2 o8��/o ����/�� �8�/o m�8�/��2 Biotite �8��/8� on�/m n8o�/�2 o�8�/o n28m/�� 2�nm/o n�2�/��8 Biotite ����/8� ����/8 �8�2/�2 o���/o o8o�/�� 228�/o ���m/��

Sample CaO Na2O K2O Total Si AlIV AlVI Ti� o�n�/o �2n2/o �m�2/� �o8�/�2 ��8/n ���/2 ���/o no�/o2 ooo2/o 8o2�/o ���2/� �n�m/�2 m2�/m n�m/8 �8�/� 8��/o8 ��mm/o ����/oo 2n��/� 8828/�2 ��/n o�/2 2��/o m��/o

Sample Fe2 Cr Mn Mg Ca Na K Cations � n2n/2 oon/o o��/o �nn/2 o�n/o 22�/o ��8/� o8m/��2 ��2/� oo�/o o2�/o o�m/2 o o��/o 88�/� mo�/�n8 m2�/2 oo�/o o8�/o ��/2 o2�/o 8o�/o ��n/� o8/��

Sample XFe XMg � o/m� o/n22 o/m� o/n88 o/m� o/nm

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2�76I < �C@�.B!B� ��������15 @/I':.6'+�I<! : ��+/F!� �� �����15 X�.#5u< ���� 'A�5� cz5 < �'�./x#� �

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.��� < � &%J)&( �./x#� � &�.� 7�%!*@����B , �I �CI!"'� �&�J ^#� !( �� &�� � ��I f7��I �% ) !WC �,�5@?/@�#!B O1(&� . �����15 +@6`�: ����B , ' &7

!dJ �� < �#( � O�#����I �/F!� +� ,�(.zWC M�.4 �% ��0.WP��C@/x] ��� )&�&�.( .#�% &C .(�I�F ��J ,

���I �I �5 �C):'!#6*� ��':.1��I < �'!�(�'M�.4 �% ?d�"'!@����B �% �C@� �&�J #�&�� � v�x"� .

TG$ � [1] Karimzadeh Somarin A., "Marano volcanic rocks, East Azarbaijan Province, Iran and associated Fe mineralization", J. Asian Earth Sci. 24 (2004a) 11-23. [2] Karimzadeh Somarin A., "Garnet composition as an indicator of Cu mineralization: evidence from skarn deposits of NW Iran", J. Geochemical exploration 81 (2004b) 47-57. [3] Karimzadeh Somarin A., Moayyed M., "Granite and gabbro-diorite associated skarn deposits of NW of Iran", Ore Geol. Rev., 20 (2002) 127-138.

]m[/0S� ~�F��H �"�, �$��'+5�6(���%J!}d "�� �'Y�1/100000�, ���,�5 �'+5�6(� �� !)�8��()��W(

6753.

[5] Irvine I.C., Baragar W.R.A., "A guide to chemical classification of the common volcanic rocks", Can. J. Earth Sci. 8 (1971) 523-548. [6] Maniar P.D., Peccoli P.M., "Tectonic discrimination of granitoid", Geo. Soc. Am. Bull.101 (1989) 113-125. [7] Pearce J.A., Harris N.B.W., Tindle A.G., "Trace element discrimination diagrams for the tectonic interpretation of granitic rocks", J.Petrol. 24,4 (1984) 956-983. [8] Shimazaki H., "Characteristics of skarn deposits and related acid magmatism in Japan", Econ. Geol. 75 (1980) 173-183. [9] Einaudi M.T., Meinert L.D., Newberry R.J., "Skarn deposits", Econ. Geol. 75th Anniversary Volume, (1981) 317-391. [10] Meinert L.D., "Variability of skarn deposits, guides to exploration", In: Boardman, S.J. (Ed.), Revolution in the Earth Sciences. Kendall-Hunt Publishing, Dubuque, Iowa, pp. (1983) 301-316. [11] Meinert L.D., "Skarn deposits in Nevada, Geology, mineralogy and petrology of Au, Cu, W and Zn skarns", In: Meinerts, L.D., Myers, G.L., Brooks, J.W., (Eds.), Geol. Assoc. Can. Spec. Pap. 40, Toronto, (1990) pp. 569-583. [12] Meinert L.D., "Igneous petrogenesis and skarn deposits", Geol. Assoc. Canada Spec. Pap. 40 (1993) 569-583. [13] Meinert L.D., "Compositional variation of igneous rocks associated with skarn deposits", In: Kirkham, R.V., Sinclair, W.D., Thorpe, R.I., Duke, J.M., (Eds.), Geol. Assoc. Can. Short Course Series, 23, Nepean, Ontario, (1995) pp. 401-418. [14] Meinert L.D., "Application of skarn deposit zonation models to mineral exploration", Explor. Min. Geol. 6 (1997) 185-208. [15] Meinert L.D., "Mineralogy and petrology of iron skarns in Western British Colombia", Canada. Econ. Geol. 79 (1984) 869-882. [16] Droop G.T.R., "A general equation for estimating Fe+3 concentrations in ferromagnesian silicates and oxides from microprobe analyses using stoichiometric criteria", Mineralogical Magazine 51 (1987) 431-435. [17] Meinert L.D., "Skarns and skarn deposits",Geosciences Canada 19 (1992) 145-162. [18] Deer W.A., Howie R.A., Zussman J., "Rock-

forming minerals, single chain silicates", 2ed., 2A (1978) Longmans, London. [19] Kwak T.A.P., "W-Sn skarn deposits and related metamorphic skarns and granitoids",Elsevier, Amsterdam (1987).

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