论文部分内容阅读
渤海湾西北岸划分出了第Ⅰ道—第Ⅵ道牡蛎礁的平面分布(图1);对牡蛎礁壳体的几何形态特征进行了描述(图2),并将牡蛎礁壳体进行了剖面切割(图3);对牡蛎礁壳体进行了X光衍射与激光拉曼(活—古)矿物晶型的对比分析(表1,图4);对俵口村BKP20-2剖面(-2.84m)牡蛎礁一个体右壳:在双目镜下对其内部结构与矿物组分进行了分析(图5);通过机械挖掘剖面及钻探获得:牡蛎礁体的空间堆积厚度与赋存的海拔高度及其各剖面垂直方向上的14C年代数据;并获得牡蛎礁体堆积的内部结构特征(图6);以及牡蛎礁体水平夹层与CaCO3含量变化(图7),其中水平夹层CaCO3含量往往偏高,初步分析可能与气候偏冷有关。对牡蛎礁壳体内充填物及壳外沉积物进行了粒度分析(表3),粒度组分及概率累积曲线等(图9)为分析牡蛎礁的生态环境提供了佐证:即牡蛎礁基本以潮下带生活环境为主。以俵口BKP20剖面为例分析了牡蛎礁体堆积物从埋深-2.14～-6.90m的生物组合特征(表4)。以上资料为获得牡蛎礁堆积体的生长-发育-消亡等演化模式提供了依据(图10)。
The northwest coast of the Bohai Bay is divided into the first I - the Ⅵ road oyster reef flat distribution (Figure 1); Oyster reef shell geometric characteristics were described (Figure 2), and the oyster reef shell was profiled (Fig. 3); comparative analysis of X-ray diffraction and laser Raman (living-ancient) mineral crystal form of Oyster reef shell (Table 1 and Fig. 4) ) Oyster reef An individual right shell: its internal structure and mineral composition analyzed under binocular (Figure 5); obtained by mechanical digging profiling and drilling: spatial packing thickness of oyster reefs and the occurrence of altitude And the 14C data in the vertical direction of each profile; and the internal structural features of the oyster reefs were obtained (Figure 6); and the changes of horizontal intercalation and CaCO3 content in oyster reefs (Figure 7). The content of CaCO3 in the horizontal intercalations tends to be high The preliminary analysis may be related to the colder climate. Particle size analysis (Table 3), particle size composition and probability cumulative curve (Fig. 9) of oyster reef shell fillings and out-shell sediments were provided to support the analysis of the ecological environment of oyster reefs: Under the living environment with the main. Taking the BKP20 section of the mouth as an example, the biological characteristics of the oyster reef deposit from -2.14 to -6.90 m were buried (Table 4). The above data provide the basis for the evolution pattern of growth, development and extinction of oyster reefs (Figure 10).