chlorite

The mineral suspension (either chlorite or hematite) was prepared by adding 3.0 g of minerals to 40 ml of distilled water.

The rocks comprise plagioclase, perthite, quartz, and small amounts of biotite, opaque oxide, titanite, rare allanite, and secondary chlorite (after biotite), leucoxene and epidote.

FESEM photographs showed that kaolinite in Chang 7 reservoir often filled in the porosity with booklet shapes (as shown in Figure 1a); chlorite was usually distributed on the surfaces of particles with leaf shapes (Figure 1b) and the form of the illite and the illitesmectite mixed layer were flocculent structure (Figure 1c and Figure 1d).

The minerals identified in the clay fractions of all profiles are as follows: (i) chlorite, (ii) illite or interlayer-cation-deficient mica (Rieder et al., 1998), (iii) smectite and / or mixed-layer smectitic minerals with a high [greater than or equal to] 50 % amount of expandable layers, (iv) mixed-layer minerals with a small amount of expandable layers, (v) kaolinite, and (vi) quartz.

Experimental evidence that such a mechanism could govern a chemical system didn't emerge until 1990, when Patrick De Kepper and his co-workers at the University of Bordeaux in France produced a stationary pattern of spots in a thin gel continuously fed a fresh solution - containing malonic acid and chlorite and iodide ions-in a special chemical reactor (SN: 8/11/90, p.88).

The IR spectra ranging from 3664 to 3406 [cm.sup.-1] are shown in Figure 2, and Table 3 shows comparisons with some chlorite minerals reported in the literature in order to assist with the assignment of the observed bands for chlorite spectra.

Five types of single mineral were used in the experiments, which were quartz, smectite, kaolinite, illite, and chlorite (Figure 2).

The discoveries include a stamp believed to date back from the Assyrian Empire, clay and chlorite stone vessels, bronze arrows, axes, gold and bronze bracelets and necklaces from the iron age.