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

New model 216 decreptiometer

Exploration of the Mt. Boppy Au deposit, NSW

Forensic tests on soil samples


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


Gold at Okote, Ethiopia

Kalgoorlie Au data

Sangan skarn Fe deposits, Iran

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 Iceland
     July 2-6

AOGS Singapore
    30 Jul - 4 Aug 2023

SGA Zurich Aug 2023

Comprehensive Geology Conference Calendar

Decrepitation results from Shandong and Hebei gold mines - Auriferous fluids without CO2.

Kingsley Burlinson

Presented at ACROFI I   Nanjing, China, May 2006

75 samples were collected from  7 Au mines in the Shandong and Hebei regions and analysed using the acoustic decrepitation method. The results show that there is no decrepitation below about 320 C. If there is a significant amount of CO2 or CH4 in the inclusion fluids, this causes decrepitation at temperatures up to 300 C so the absence of low temperature decrepitation in these results indicates that the hydrothermal fluids associated with these deposits lacked any significant amount of CO2 or CH4 in their parental fluids. Although some researchers have identified CO2 rich inclusions in these deposits, these must be very minor stages in the mineralising system. Without detailed study of the many stages of quartz growth it is not possible to discern the actual importance of the rare CO2 rich fluid events, but it is probable that the majority of the Au mineralistion in these CO2 deficient systems was transported in aqueous fluids which lacked any significant CO2 or CH4 content.

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