Matter
Name
Pigment Beauregard (PIG_0174_A_601), powder (grains inf. 160µm)
Family
Family
mineral
Comments
also contain trace amount of Manganese and clay minerals (not detected by DRX)
Database
Experimentalists
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
Image
Pigment Beauregard, powder < 160 µm (PIG_0174_A_601) with red spectralon standard
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
Publications