Applied mineral exploration methods, hydrothermal fluids, baro-acoustic decrepitation, CO2 rich fluids
Viewpoints:

How CO2 inclusions form from aqueous fluids

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

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

Inclusion shapes can prove heterogeneous FI trapping

Disproportional FI trapping from heterogeneous fluids explains gas-dominant systems

A discussion of H2 analysis by mass spectrometry

A mechanism to form H2 in the MS ioniser during analyses


News:

New model 205 decreptiometer

Studies of 6 Pegmatite deposits

A study of the Gejiu tin mine, China

A magnetite study - Bergslagen region, Sweden

Exploration using palaeo-hydrothermal fluids

Using opaque minerals to understand ore fluids

Decrepitation using Fe-oxide opaques

Understanding baro-acoustic decrepitation.

An introduction to fluid inclusions and mineral exploration applications.



 Interesting Conferences:


IMA 2018, Melbourne Aust., Aug 13-17 2018

IAGOD, Salta Argentina, Aug. 28-31 2018

ACROFI-2018, Beijing, Sept. 11-17 2018

SEG, Keystone Colorado, Sept. 22-25 2018

AGCC expo, Adelaide, Aust. Oct. 14-18 2018

-----2019-----

AOGS 2019 Singapore

ECROFI, June 24-26, Budapest, Hungary

SGA, Glasgow Scotland, Aug. 27-30 2019


Comprehensive Geology Conference Calendar


Hydrogen analyses of aqueous fluids by mass spectrometry are wrong

Hydrogen  (H2) is a by-product of the ionization of water in the mass spectrometer ionizer.

Analyses of hydrogen in fluid inclusion fluids should not be done by mass spectrometry. Laser raman analysis should be used instead.


Mass spectrometry is often used to analyse the chemical composition of fluids within fluid inclusions. Many studies have observed hydrogen based on these analyses. However the reported hydrogen contents are often surprisingly high. Some authors have realized that there is a problem and have proposed that the hydrogen has come from the chemical reduction of water during the analyses, although this is thermodynamically improbable. However there is an alternative explanation.  The problem is due to an incomplete understanding of the ionization process in the ionizer of the mass spectrometer and that H2 (mass 2) is a spurious byproduct of the ionization of water. The discussions here explain the issues relating to hydrogen analyses in fluid inclusions using mass spectrometry.

A discussion of analyses reported in the literature and my own analyses which lead to recognition of the ionization problem.
                Hydrogen analyses reported from the Idaho cobalt belt by Gary P Landis and Albert H Hofstra, 2012.
                Hydrogen analyses reported from the Maw zone, Athabasca, Canada by Rabiei et. al. 2017.




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