Applied mineral exploration methods, hydrothermal fluids, baro-acoustic decrepitation, CO2 rich fluids #
Newest Topics:

Exploration of the Mt. Boppy Au deposit, NSW

Forensic tests on soil samples

Gold at Okote, Ethiopia


Do IOCG deposits form from CO2 fluids?

How CO2 inclusions form from aqueous fluids (UPDATED)

Understanding heterogeneous fluids : why gold is not transported in CO2-only fluids

Gold-quartz deposits form from aqueous - CO2 fluids: NOT from CO2-only fluids

Discussions why H2 analysis by mass spectrometry is wrong


Kalgoorlie Au data

Sangan skarn Fe deposits, Iran

New models 205 & 216 decreptiometer

Studies of 6 Pegmatite deposits

A study of the Gejiu tin mine, China

Exploration using palaeo-hydrothermal fluids

Using opaque minerals to understand ore fluids

Understanding baro-acoustic decrepitation.

An introduction to fluid inclusions and mineral exploration applications.

 Interesting Conferences:


ECROFI 2021, Reykjavik, Iceland

SGA, Rotorua NZ, RESCHEDULED to march 28-31 2022
6th Archean, Perth, W.Aust. RESCHEDULED unknown date 2022

Comprehensive Geology Conference Calendar

Sangan Fe skarn deposits, Iran - Sample descriptions

h2743 Sample#   A1      IR14 0.5g -420+200u"
Iran - Fatemeh Sepidbar                            "Coarse brown garnet, brecciated, with minor carbonate"

h2744 Sample#   B4      IR14 0.5g -420+200u"
Iran - Fatemeh Sepidbar                            "massive black magnetite, minor carbonate, weakly magnetic only"

h2745 Sample# C4        IR14 0.5g -420+200u"
Iran - Fatemeh Sepidbar                            "massive black magnetite, minor sulphide, moderately magnetic"

h2746 Sample# 2-13      IR14 1.0g -420+200u"
Iran - Fatemeh Sepidbar                             "brown-black vuggy haematite, non-magnetic. From volcanics."

h2747 Sample# 2-14       IR14 0.5g -420+200u"      ?Baryte hand separation
Iran - Fatemeh Sepidbar                            "coarse ?baryte and haematite, non-mag. does not react with 10% HCl, suspected baryte"

h2748 Sample# 2-14        IR14 0.5g -420+200u      haematite dominant hand separation       Acid washed repeat of run H2747
Iran - Fatemeh Sepidbar                             "coarse ?baryte and haematite, non-mag. Acid washed, but unreactive, suspected baryte"

h2749 Sample# 3-6          IR14 1.0g -420+200u       haematite
Iran - Fatemeh Sepidbar                             "brown-black vuggy haematite, non magnetic. From volcanics"

Microscope observations of grains used for analysis

h2744  IR14    B4  95% mag/haem grains. magnetic separated. But only weakly magnetic, so dominantly haematite.
Other minerals are mostly CO3 (has crystal faces)  in composite grains.
traces of white non-crystalline material.
no sulphide  Feox has speckled surfaces, not micaceous

h2745  IR14    C4  90%  mag/haem grains.  magnetic separated
Micaceous haematite with curved surfaces.
Very rare traces of sulphide. (hand specimen had more, but probably not magnetic)
most non-Feox are white, non-crystalline. Trace CO3.  no qtz?

h2743  IR14    A1  garnet   mag separated
 semi translucent light brown 95% garnet, trace quartz, minor magnetite / haematite  No sulphide
saw 1 nice octahedral Magnetite crystal

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