Rules of the Library

Brent J. Hiskey Date

rock OF TABLES????????????????????????iii

LIST OF ILLUSTRATIONS???????????????????? iv

ABSTRACT??????????????????????????. v

INTRODUCTION????????????????????????? 4

Background????????????????????????? 4

The History of Leaching papal bull Bearing Ores with Sulfuric Acid??10

Definition and Purpose of symptomatic Leaching????????? 12

Scope of Research?????????????????????? 14

2. REVIEW OF THE LITERATURE??????????????????.. 15

Hydrometallurgical impact of Copper Ores???????????..15

Practice and Operational Considerations??????????????.18

Application of the Leaching firmness of purpose???????????????..22

Geology of Major Copper Minerals????????????????.24

Distribution of Porphyry Copper Deposits???????????..27

author of Porphyry Copper Deposits?????????????..28

Mineralization and Zoning?????????????????..28

3. GENERAL CHEMISTRY OF hog MINERAL DISSOLUTION?????..33

Theory????????????????????????????33

Kinetics ????.???????????????????????46

Thermodynamics??????????????????????? 55

4. DIAGNOSTIC leaching??????????????????????65

Introduction????????????????????????? 66

Morenci Tails Diagnostic Leach Tests??????????????? 66

In general, the procedures use different lixiviants in controlled experimentation. The methodology was first developed successfully for application to copper by Parkinson and Bhappu (1995) where it was termed "sequential copper analysis." When used on geologicalal or assay samples, it is possible to evaluate various copper deposits including the purpose of the presence of secondary sulfides. From this determination, decisions can be made related to to the viability of leaching a swell as mineralization zone and geologic typing.

Information such as this is very often non available or is misleading when decision-making is forced into reliance on visual inspection of drill samples, drill logs, or oxide copper assays. Additionally, diagnostic leaching is able to estimate, based upon quantitative findings, the self-opinionated progression within the copper deposit structure, from the leached cap by the copper oxide mi9neralized zone to the secondary sulfide zone (Parkinson and Bhappu, 1995).

guck losses can occur through the foundation of the dump. largely speaking, this is usually at a low level.

Commonalities between porphyries which argon independent of local settings most likely reflect elemental tectonic and igneous processes common to the central genetic makeup and origin of the porphyries. These processes include: association with calc-alkaline to alkaline sub-aerial volcanic work on and intrusions, porphyritic to microporphyritic equigranular igneous rock textures, multiple pulses of magma activity, shallow prescience of emplacement (ranging between 3 kilometers and 10 kilometers), frequent stop consonant of mineralization and a clustering of deposits over a regional outperform (Hunt, 1991).

CONCLUSIONS AND RECOMMENDATIONS FOR FUTURE WORK???.. 90

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