Database

• PIG

Experimentalists

• Eva Fabro

Parent matter

Pigment Beauregard facies A (PIG_0174_A), hematite-rich vein

Level

from laboratory repository

Origins

natural terrestrial

Provider

Pigmenthothèque - EDYTEM

Provider reference code

Beauregard < 160 µm – PIG_0174_A_601 (2016-023)

Local reference code

PIG_0174_A_601_Beauregard-inf160

Body name

Earth

Terrain type

mineral surface

Place

Thoste, Côte d'Or , Bourgogne-Franche-Comté , France

Coordinates

System

WGS84

Position type

point

Geolocation

Point	Latitude	Longitude	Altitude
#1	47.44768°	4.22644°

Comments

in heap

Preparation

sieved fraction

Method

crushed and sieved with a mesh of 160 µm

Storage condition

room temperature and conditions

Phase type

solid

Component type (group)

sedimentary rock (iron-sediment or ironstone)

Comments

Ferruginised crinoid-rich wackstone-packstone containing entirely ferruginised crinoid fragments (3mm) in a hematite-rich cement - Era: Mesozoic, lower Jurassic, Hettangien ferrugineux

Shape

very fine dark red-bordeaux powder

Texture

pulverulent

Type of porosity

particulate

Density

1.09 $\pm$ 0.15 $g.cm^{-3}$

Texture

compact

Grain density

1.09 $\pm$ 0.15 $g.cm^{-3}$

Grain sizes

Grains	Size min	Size max	Size median	Size width	Size mass fraction	Grain shape
#1	0.0 ${\mu}m$	160.0 ${\mu}m$			1.0	equant

Size distribution

possibly large fraction below 50-100 µm

Size method

sieving with mesh of 160 µm

Comments

density varies with the degree of settlement

Oxides

Formula	$SiO_{2}$	$Al_{2}O_{3}$	$Fe_{2}O_{3}$	$MnO$	$MgO$	$CaO$	$Na_{2}O$	$K_{2}O$	$TiO_{2}$	$P_{2}O_{5}$
Mass fraction (%)	8.51	2.48	75.94	2.82	0.07	1.54	0.015	0.32	0.1	0.46

Oxides comments

Contain Mn and Ca (4.36% in oxide) and small impurity of P, Ti, Na, K, Mg, (0.97% in oxides), fire loss: 5.66%

Number

4

Mode of mixing

heterogeneous mixing

Materials

	Name	Arrangement	Mass (g)	Mass fraction	Abundance comments
	Hematite-goethite	hematite and minor amount of goethite both in cement and as pseudomorphosis of bioclasts (crinoids and others)		0.917	91.7% of the crystalline phases
	Quartz	grains embeded in a ferric matrix (hematite + some goethite)		0.05	< 5%. Assumed mass fraction = cross section fraction in raw material. But possibly less if not crushed as original grains are larger (200-500µm) than sieve
	Fluorite	grains embeded in a ferric matrix (hematite + some goethite)		0.05	< 5%. Assumed mass fraction = cross section fraction in raw material
	Baryte	grains embeded in a ferric matrix (hematite + some goethite)		0.05	< 5%. Assumed mass fraction = cross section fraction in raw material

Links

• Research Gate: Pigmentothèque

Publications

• Chalmin et al., 2021, Color Res. Appl., on-line, 1 - 21