MP1 Optical Example Pb Slag

Petrolab Limited www.petrolab.co.uktel +44 (0)1209 219541 email [email protected]

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Lead Slag

A clientMineralogical Report MP1 Example

Mineralogical Report

Contents List of samples & sections..........................................................................1 Methods of investigation ............................................................................1 Sample description.....................................................................................1

1) Sample Lead Slag..................................................................................................2

Cover image notes

Sample Lead Slag. Photomicrograph showing fine zinc spherules locked in slag. Plane polarised reflected light. Not to scale.

Lead SlagMP1 Example

Issued by Petrolab Limitedi

Mineralogical Report

Petrolab document control

Client A client

Report title Lead Slag

Analysis required Quantitative mineralogical investigation by optical microscopy.

Client reference -- Client contact --

Number of samples 1 Sample type(s) Metallurgical test

Report ID (version) MP1 Report date Example

Prepared by J Strongman Msci ARSM Checked by J Fletcher BSc MSc

This report relates only to those samples submitted and specimens examined and to any materialsproperly represented by those samples and specimens. This report is issued to the Client namedabove for the benefit of the Client for the purposes for which it was prepared. It does not confer orpurport to confer on any third party any benefit or right pursuant to the Contracts (Rights of ThirdParties) Act 1999.


Issued by Petrolab Limitedii

Mineralogical Report A client

List of samples & sections

Samples received & sections prepared

Reportorder Sample reference

Mass(g) Type

Sectionsprepared

1 Lead Slag Metallurgical test 1 No. 30mm polished block section

Methods of investigation A detailed mineralogical investigation was requested, with special reference to metallicphases.The submitted sample was examined as received using a Nikon SMZ-U stereoscopicmicroscope with fibre optic illuminator. One or more sections were prepared from thesample (see table above). The sections were examined by conventional transmitted andreflected light polarising microscopy using a Nikon Labophot-2 research polarisingmicroscope. Modal analysis was carried out using a Pelcon 64 channel electromechanical pointcounter. The precision of point-counting depends on the number of points counted andthe true abundance of the phase of interest in the sample.1

Digital photomicrographs were taken using a Nikon DMC1200F 13.5 megapixel cameraattached to the trinocular head of the microscope.

Sample descriptionA detailed description of each sample begins over-page.

1 Van de Plas, L, Tobi, A. C., 1965. A chart for judging the reliability of point-counting results. Am.J.Sci, (263)65, pp 87-90.The estimated relative precision for one thousand points counted is, for example, 7% for a phase withan abundance (by volume) of 50% and 20% for a phase with an abundance of 10%. Phases with a true abundance of 2% or less may have a relative error of greater than 32%. The estimated precision of the point-counting technique does not allow for errors caused by sampling and sample preparation.


Issued by Petrolab LimitedPage: 1 of 5


1) Sample Lead Slag

Sample details

Sample Lead Slag

Petrolab ID Date received Type condition properties

XXXXX XXXXX Metallurgical test

Modal analysis

Sample Lead Slag

Phase, abbreviation General formula | s.g. Wt% Comments

Slag (silicate glass), slg sg~2.90 82%

Lead, Pb Pb | sg~11.37 10%

Zinc, Zn Zn | sg~7.05 6% Includes metallic zinc & zinc sulphide

Oxides, oxide sg~3.80 2%

Wt% calculated from modal volume using estimated mineral s.g. data. Phases seen in thin section but not intersected in the modal analysis are noted as trace. Phases with a true abundance of 2% or less (by volume) may have a relative measurement error of greater than 32%.




Phase description

Sample Lead Slag

Phase, abbreviation Min Max Typical Prominent grain type

Slag (silicate glass), slg 200 m 2 mm 1.2 mm Composite grains

Description

Irregular conchoidal fractured grains of what appears to be a silicate glass. The glass host numerous inclusions and attachments of metallic lead and zinc that occur as spherules, blebs and veinlets. Although grains contain numerous ultra fine inclusions of lead and zinc, the majority of the lead is relatively coarse, with an average size of 200 m, and the zinc has an average size of 40 - 60 m.

Lead, Pb < 5 m 800 m 200 m Spherules

Description

Spherules and irregular blebs of native lead as attachments and inclusions in gangue silicates. Lead grains show only a minor association with zinc, when occurring together lead forms the core with a zinc halo.Lead also shows evidence of minor oxidation with the formation of oxide rims > 200 m thick.

Zinc, Zn


Photomicrographs

1 mm

oxide

Pb

Pb

Zn

A Sample Lead Slag

General view showing uniform coarse lead (Pb) and finer grains of zinc (Zn) View also shows an oxide grain.

Image ANikon Labophot-2 petrological microscopePlane polarised reflected lightx25

500 m

Zn

slg

Pb

slg

B Sample Lead Slag

Zinc attachments and coatings on slag (slg). The view also shows a typical lead spherule.

Image BNikon Labophot-2 petrological microscopePlane polarised reflected lightx40




200 m

oxide

Zn

slg

Zn

C Sample Lead Slag

Fine zinc (Zn) spherules in slag (slg).

Image CNikon Labophot-2 petrological microscopePlane polarised reflected lightx100

200 m

oxide

Pb

Zn

slg

Pb

D Sample Lead Slag

Lead (Pb) grain with an oxide coating.

Image DNikon Labophot-2 petrological microscopePlane polarised reflected lightx100



List of samples & sectionsMethods of investigationSample description1) Sample Lead Slag

Documents

MP1 Optical Example Pb Slag