| 词汇 | hematite |
| 释义 | hematite noun[ C ] uk /ˈhiː.mə.taɪt/ us /ˈhiː.mə.taɪt/ US spelling ofhaematite赤铁矿（haematite的美式拼写） Examples of hematitehematite This suggests the hematite crystals are not oxidation products of siderite, because pyrite is easily altered to goethite under an oxygenated atmosphere. Each household had at least one, and often a few, hematite (iron oxide) cylinders. They also had to obtain their hematite pigment cylinders, seashells, presumably salt, and some other commodities from central places outside the village. The cylinders were made of powdered hematite held together by an unknown, but presumably organic, binder, and they were of a standardized size and shape. The topography and chaotic terrain may favor a hydrothermal aquifer as the original setting where hematite formed. The fault planes are characterized by anastomosing clayey gouge layers with thin (1 mm-10 cm) zones of cataclasite, breccia and hematite-clay-coated fractured rock. One of the young adults was closely associated with a layer of ground hematite and two jade beads. Future activities include climbing out of the crater and investigating this hematite-rich material. So, too, it appears that hematite-a red oxide powder sprinkled over mortuary remains-was not widely available. Secondary minerals are epidote, calcite, chlorite and hematite. The black bands contain aggregates of magnetite grains that fill similar botryoid cells with hematite one. Elsewhere, acquired magnetizations continue to climb in higher fields, indicating that hematite is a significant ferromagnetic component in both pluton and aureole. The landing site was selected partly because coarse gray hematite was expected to be present on the basis of orbital data. Households often kept mica near the hematite, perhaps as a "poor person's" imitation of specular hematite pigment. Figure 4a shows a microfold from a banded hematite quartzite sample. See all examples of hematite These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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