What is the objective of geochemical survey?

What is the objective of geochemical survey?

The objective of a detailed rock or residual soil geochemical survey is to locate precisely mineralized structures. For this purpose, a grid is laid over the prospective area, and systematic sampling of rock or residual soil is carried out.

How the geochemical survey is used for the exploration of mineral deposits?

In geochemical surveys targeting mineral resources exploration, geochemical samples as stream sediments (fine sands), soils (subsoil or saprolite) and rocks (hydrothermal or mineralized alteration rocks) are collected based on the exploration stage, and are sent for chemical analysis.

What are geochemical methods?

Geochemical methods involve the direct measurement of radionuclide concentrations (U, Th, K, and Rb) in a small sub-sample using such techniques as inductively coupled plasma mass spectrometry, X-ray fluorescence spectrometry, or atomic absorption spectrophotometry.

What is a geochemical sample?

Geochemical sampling methods are methods which involve collecting and analyzing various types of geological materials (such as soils, stream sediments and rocks) or certain biological materials (such as plants). After discovery, geochemical sampling plays a key role in the delineation of mineralization.

What are geochemical anomalies?

Definition: Area where geochemical properties (e.g. single or multiple element concentrations or isotope ratios) differ from surrounding areas and which may be the result of mineralisation.

What is geochemical study?

Geochemical Studies is a collection of papers dealing with ore petrology, particularly on the genesis of ores found in sediments. With better techniques of microprobe analysis of trace elements, the paper notes that ore deposits in sedimentary rocks can be characterized by their minor element suites.

What are the geochemical prospecting method?

Geochemical prospecting for minerals includes any method of mineral exploration based on systematic measurement of the chemical properties of a naturally occurring material. surficial environment, determines the characteristics of the geochemical anomalies it can form.

What is a geochemical environment?

It is an environment of high temperature and pressure, restricted circulation of fluids, and relatively low free-oxygen content. The secondary environment is the environment of weathering, erosion, and sedimentation at the surface of the Earth.

What is positive geochemical anomaly?

In mineral exploration interest is generally in positive anomalies, on the assumption that ore deposits and their weathering have increased element abundances above normal crustal levels.

What is geochemical element?

Knowledge of the geochemical distribution of elements involves elucidation of the relative and absolute abundances of the chemical elements in the Earth and in its various parts—the crust, interior, atmosphere, and hydrosphere.

What is the difference between prospecting and exploration?

Prospecting is very often followed immediately by exploration. Exploration can be defined as the science of prospecting in which modern and sophisticated instruments and equipment are used in search for, and qualitative assessment of mineral/ ore in a prospect and known defined area.

What are the Earth’s geochemical cycles?

The ways in which an element—or compound such as water—moves between its various living and nonliving forms and locations in the biosphere is called a biogeochemical cycle. Biogeochemical cycles important to living organisms include the water, carbon, nitrogen, phosphorus, and sulfur cycles.

What are the different types of geochemical surveys?

6.4.1 Types of Geochemical Surveys. Geochemical surveys are carried out under two broad stages: reconnaissance and detailed. The key purpose of a reconnaissance survey is preliminary assessment of a very large area using a small scale of mapping. Such surveys are normally done by sampling stream sediments.

What is the sample density of a geochemical survey?

Sample density varies from one sample per square kilometer to one sample per thousands of square kilometers. Multielement geochemical surveys, principally involving stream sediments or soils, continue to be a cornerstone of regional mineral exploration.

Where was the geochemical survey in B.C.?

A geochemical survey involving four traverses (two over each deposit) was conducted at 8 North and 5 North deposits (Smee, 1998). S.M. Gandhi, B.C. Sarkar, in Essentials of Mineral Exploration and Evaluation, 2016

Which is the best definition of survey research?

SURVEY RESEARCH. Survey research is defined as “the collection of information from a sample of individuals through their responses to questions” ( Check & Schutt, 2012, p. 160 ). This type of research allows for a variety of methods to recruit participants, collect data, and utilize various methods of instrumentation.