"intrinsically economic resources" is one of the four levels under China's classification of natural resources in terms of three-digit numbers. Three categories, 331, 332 and 333, come under "intrinsicially economic resources".

"內蘊經濟" means "intrinsically economic", .e. a resource based solely on geology with no feasibility or pre-feasibility conducted.


內蘊經濟資源量3個，探明的（331）、控制的（332）、推斷的（333）

Chinese resource category code 333 is equivalent to JORC Inferred or Unclassified Resource. Chinese resource category code 334 is equivalent to a JORC Unclassified or Exploration Potential resource.

Each digit in Chinese resource category codes is derived from an assessment of a particular characteristic of a project. The first is a measure of economic evaluation, the second a measure of feasibility evaluation and the third a measure of geological evaluation. For the first digit, 3 is defined as Intrinsically Economic, i.e. a resource based solely on geology with no feasibility or pre-feasibility conducted. For the second digit, 3 indicates that the Project is at the Geological Study stage, i.e. an initial evaluation of economic viability has been carried out, with the objective of defining an investment opportunity. For the third digit, 3 defines the resource as Inferred, i.e. there is an early stage recognition and understanding of geological characteristics such as structure, style and grade of the ore deposit, but information and data used to estimate the resources are limited, with many factors uncertain, including the continuity of the orebody; 4 defines the resource as Predicted, i.e. the Project is at the reconnaissance stage only, in an area defined as having mineral potential.
http://www.southchinaresources.com/News/Archive/Cooperative_...

http://www.unece.org/ie/se/pdfs/UNFC/oct06/11oct/China1.pdf


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Note added at 38 mins (2008-05-29 00:54:47 GMT)
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Please refer to Page 3 of http://www.unece.org/ie/se/pdfs/UNFC/oct06/11oct/China1.pdf

There is a tabulation of Chinese standards on Page 3.

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Note added at 52 mins (2008-05-29 01:09:11 GMT)
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Intrinsically Economic (E3):

Coal, Uranimum and other solid resourcese:
Quantities, reported in tonnes/volume with grade/quality, estimated by means of a geological study to be of intrinsic economic interest. Since the geological study includes only a preliminary evaluation of economic viability, no distinction can be made between economic and potentially economic. These resources are therefore said to lie in the range of economic to potentially economic. Generally only in-situ quantity figures are reported.

Petroleum: Quantities that are of undetermined economic viability or are of no economic interest (unrecoverable).

This is based on UN's classification of natural resources.
http://209.85.175.104/search?q=cache:UPAdwUFETE4J:www.world-...