Characteristics of Carbonates of Gorgonian Axes (Coelenterata, Octocorallia).
Characteristics of Carbonates of Gorgonian Axes (Coelenterata, Octocorallia).
复制标题
柳珊瑚轴（腔肠动物，八珊瑚）碳酸盐的特征。
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
G. Telesnicki
中科院分区：
文献类型：
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作者：
J. C. Lewis;T. Barnowski;G. Telesnicki
通过 SEM、X 射线衍射和偏光显微镜检查了 13 种柳珊瑚的轴向骨骼。方解石虽然偶尔是无定形的，但它是轴体的主要生物碳酸盐。非生物成因矿化可以是方解石、无定形或文石质。 Plexaurella 的轴含有许多球状棱柱晶体的透镜状方解石室。 Ellisella barbadensis 中的矿化呈垂直取向的板条状晶体同心层的形式，这些晶体延伸穿过环形结构。许多纵向胶原纤维在晶体上穿孔。 Lophorgia cardinalis 中的矿化呈新月形、盾形、扁平、层压板的形式，由钙化（鞘状）和未钙化胶原纤维的交替层组成。所有物种中的纤维成分均平行于轴的纵轴取向。 Plexaurella 和 E. barbadensis 物种的横向断裂晶体上的细条纹可能代表日常生长带。讨论了矿物形态与硬度、抗扭曲性和水运动区的功能关联。
Axial skeletons of 13 species of gorgonians were examined by SEM, X-ray diffraction, and polarizing microscopy. Calcite, though occasionally amorphous is the major biogenic carbonate of axes. Non-biogenic mineralization may be calcitic, amorphous, or aragonitic. Axes of Plexaurella contain numerous, lenticular, calcitic loculi of spherulitic prismatic crystals. Mineralization in Ellisella barbadensis is in the form of concentric layers of perpendicularly oriented, lath-shaped crystals that extend through the annulations. Numerous longitudinally oriented collagen fibers perforate the crystals. Mineralization in Lophogorgia cardinalis is in the form of crescentic, shield-shaped, flat, laminated plates composed of alternating layers of calcified (sheathed) and uncalcified collagen fibers. The fibrous component in all species is oriented parallel to the longitudinal axis of axes. Fine striae on transversely fractured crystals of species of Plexaurella and E. barbadensis probably represent daily growth banding. The functional associations of mineral forms with stiffness, resistance to twist, and water movement zones are discussed.