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

Forensic tests on soil samples

Gold at Okote, Ethiopia

Viewpoints:

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



News:

Kalgoorlie Au data

Sangan skarn Fe deposits, Iran

New model 205 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:

-----2021-----

ECROFI 2021, Reykjavik, Iceland

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


Comprehensive Geology Conference Calendar


 

Meguma Terrane, Nova Scotia, 2002
A comparison of gold deposits across eastern Nova Scotia
Carbonate samples from Isaac's Mine

Kingsley Burlinson,
Burlinson Geochemical Services Pty. Ltd.
Darwin, NT, Australia


These carbonate samples show intense decrepitation at high temperature which is difficult to interpret.

carbonate decrepitation
 
 

RUN   H1755  1499K = 2021K        med grain massive white carbonate
RUN   H1756  1499L = 2021L        Coarse grain white carbonate & pale grey qz
RUN   H1757  1499M = 2021M     Very Coarse grain cream carbonate
 

In comparison, here are some results from other carbonates in Tunisia, Queensland and Ontario. Almost all carbonates give intense decrepitation, but the temperatures of decrepitation do not seem to be related to mineral formation temperatures.

Carbonates frequently show intense high temperature decrepitation and the inclusions in carbonates are probably trapped on cleavage planes. The decrepitation pattern may well be a function of the mineral cleavage and  reflect extreme stretching due to ductility or weak crystal bonding across the cleavage plane. It seems unlikely that these decrepitation temperatures represent fluid trapping temperatures. Microthermometric temperature measurements on the carbonate from Bou Jaber, Tunisia, are 90-120° C


carbonate comparisons