Applied mineral exploration, fluid inclusions and baro-acoustic decrepitation, gold Au deposit models, CO2 rich fluids, Au transport and deposition 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:

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:


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

-----2019-----

ECROFI, June 24-26, Budapest, Hungary

AOGS, Singapore, 28 Jul-2 Aug 2019

SGA, Glasgow Scotland, Aug. 27-30 2019


Comprehensive Geology Conference Calendar


Decrepitation studies in gold exploration. A case history from the Cotan prospect, N.T., Aust.

Burlinson, K.

Journal of geochemical exploration,  42/1 (1991) 143-156

Abstract

The decrepitation method is capable of providing information on the abundance of CO2-rich fluid inclusions in quartz samples by the observation of decrepitation at abnormally low temperatures (below 350oC). The method has been used in extensive regional and detailed studies in the Pine Creek goldfields, where a correlation between Au mineralisation and CO2 content was observed by comparing analyses of samples from several existing operating mines with various other quartz samples from unmineralised areas throughout the region. An area of interest, defined by the regional scale sampling, was subjected to detailed study and this work delineated an anomalous zone with high CO2 content which is closely related to a zone of low-level anomalous Au contents in quartz samples. The quartz shows highly variable decrepitation (and consequent CO2 contents) over small distances, due to the presence of growth  zoning and multiple stages of quartz emplacement, as is typical of a high level depositional environment.

The full paper as a pdf is here

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