Núm. 50 (1999)

Geology and geochemistry of the colliguas gold district, Central Coastal Cordillera, Chile
T Hernández , B Townley , C Palacios , V Maksaev

93

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Mercury as an indicator of the regional extende of gold mineralizing processes in the North Sudetic trough, Sudetes mts. (Poland)
S Speczik , J.B Maciolek , A Wojciechovski , J.W. Farbisz

107

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Magnetic properties of Cu (Fe) mineralized zones of Carolina de Michilla district ( Northern Chile): Aeromagnetic exploration application
A Tassara , P Roperch , P Sepúlveda

127

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Invited conferencia:" Analysis? Wich analysis, of wat and why?"
Colin C. Brooks

7

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Morphologic evolution of transported gold nuggets in different climatic terrains
G Herail , C Palacios , R Orellana , B Townley , A Lahsen , M.A. Parada

35

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Rutile crystal chemistry from the El Teniente porphyry copper deposit, Chile
O.M Rabbia , D.H French , L.B. Hernandez

51

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Geochemistry of gold crystals in epithermal, gold porphyry, and gold-rich copper porphyry deposits: a discrimination model
C Palacios , G Herail , P Rivas , F Sepúlveda , ,B Townley , V Maksaev , A Lahsen , M.A. Parada

67

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Base and precious metals distribution in the mainland Chilean Patagoni: exploration potential
B Townley , V Maksaev , C Palacios , A Lahsen , M.A Parada

83

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Morphologic and chemical characteristic of gold grains: methodologic imprevements for gold-bearing deposit exploration in active continental margins
C Palacios , C Ulloa , F Sepúlveda , V Maksaev , G Herail , B Townley , A Lahsen , M.A. Parada

99

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Gold exploration in the antena district, Central Coastal Cordillera, Chile: partial extraction techniques
B Townley , C Palacios , V Maksaev , R Hurtado , R Jorquera

111

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Gold content in barite as a possible cheochemical indicator for gold-bearing mineralizations
Todor A Todorov

131

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Morphologic evolution of gold grains versus distance to the source in recent sediments at the las Palmas district, Central Chile: an exploration tool
G Herail , C Palacios , R Orellana , B Townley , A Lahsen , M.A Parada

23

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Gold dispersion in african semi-arid environment
J.C Parisot , S Dieng , O Bamba

41

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Oxigen isotopes of emerald: a relevant tracer for its geological origin
G Giuliani

57

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Tourmaline from andean porphyry copper deposits and its significance in the exploration of andean muneralization
R.W. King , D.H. French

73

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Behaviour of gold and other heavy mineral related elements in stream sediments: implications for sedign and interpretation of exploration geochemical surveys
W.K. Fletcher

89

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The use of selectie extraction geochemistry in deep cover prospecting in South America
P Roger

103

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Partial extraction geochemical tecniques in solis: A case history in the gaby pophyry copper, II Región, Antofagasta,Chile
G.A. Puig , C.R Venegas , R.A. Vásquez

119

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The origin fluorine in surfaces waters
R.G. Valera , P.G. Varela

135

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Paramagnetic defects in scheelite from gold quartz vein deposits
D Haberann , U Kempe , F Wirbeleit , M Plotze , J. R Niklas

29

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Geochemistry of gold grains in the Cerro Casale porphyry gold deposit, Maricunga belt, northern Chile
C Palacios , G Herail , P Rivas , F Sepúlveda , B Townley , V Maksaev , A Lahsen , M.A Parada

45

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The trace element contents of muscovite and K-feldpar as prospection aid for Ta and NB-rich pegmatites in the pegmatite district of Aracuai (Minas Gerais, Brazil)
C Preinfalk , G Morteani

61

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Vertical zonation of copper and silver in gold crystals at the Cerro Casale gold porphyry deposit, Maricunga belt, northern Chile
C Palacios , F Sepúlveda , P Parseval , Herail, G Herail, G , V Maksaev , B Townley , A Lahsen , M.A Parada

79

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