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


Baro-acoustic decrepitation study of the Malanjkhand Cu mine, Central India


58 samples were collected from the Malanjkhand Cu deposit and nearby background areas.

Interpretation

None of these samples show a low temperature decrepitation peak near 300 C and it is concluded that this fluid system had very low or no CO2 and was  comprised of just aqueous fluids.  Each decrepitation result was mathematically reduced to its component gaussian distributions to provide a precise way of measuring the peak temperature of each result. For most samples, skewed gaussian fits provided the best fit to the observed data curves.

The samples were compared using the fitted temperature of the decrepitation peak in the temperature interval from 450 C to 510 C. This shows there are consistent temperature differences across the pit and between mineralised and barren samples within and near the pit. These temperatures are plotted against sample location and mineralisation type below.

Baro-acoustic decrepitation provides a means of measuring subtle temperature differences within the mineralising fluid system and could be useful in evaluating nearby mineralisation potential.

Summary Results Table


mjsum

Data


h2221

h2223

h2226

h2227

h2230

h2234

h2240

h2253

h2255

h2267

h2269

h2272

h2277

Skew versus Gaussian fits to the data

The following 2 pair of plots show the fitting of mathematical curves to the raw data. In most cases, the best fit is provided by using a skewed gaussian distribution. Once fitted, the temperature of the best fit peaks can be precisely measured and used for inter-sample comparison.


h2224-2

h2224-2k

h2236-2

h2236-2k


Table of actual fitted peak temperatures

                              


india

Sample locations

Sample numbers shown here are the MJ-numbers referred to in the Summary data table


mjsatloc

Sample Descriptions

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