一般来说,然而,全部的器官的碳(TOC ) 直接为 paleoproductivity 被用作一个代理它是不仅由 paleoproductivity 影响了,而且由氧化还原作用条件和源自陆地的由岩屑形成的事流入控制了。专业和踪迹元素被分析以达到在 Hongshuizhuang 形成的免职期间调查氧化还原作用潜力和 paleoproductivity。在礼品,学习, C-S 关系, V/Cr 比率和瞬间集中显示然而,白云石在 oxic 环境被扔大多数黑页岩在 euxinic 环境被积累。在 Hongshuizhuang 样品的 P/Ti 价值能与在被考虑被扔在下面的日本 Ubara 二叠三叠纪的节的那些相比一对高 paleoproductivity 中等。Ba/Al 价值是比从被认为在高 paleoproductivity 下面被积累的中央加利福尼亚(CCAL ) 的大陆人边缘的把压成薄片的沉积的稍微低的。这些结果显示 paleoproductivity 在 Hongshuizhuang 形成的免职期间对高度中等。埋葬器官的碳与 V/Cr 和瞬间显示出积极关联,但是分别地,仅仅微弱地或不与 P/Ti 和 Ba/Al 显示出关联尽管 paleoproductivity 在 Hongshuizhuang 形成的免职期间对高度中等,建议那,它的器官富人的沉积被氧化还原作用条件主要控制并且没与 paleoproductivity 有直接关系。
In general, total organic carbon (TOC) is directly used as a proxy for paleoproductivity, however, it is not only affected by paleoproductivity, but also controlled by redox conditions and terrigenous detrital matter influx. Major and trace elements were analysed with the purpose of investigating the redox potential and paleoproductivity during deposition of the Hongshuizhuang Formation. In the present study, C-S relationship, V/Cr ratio and Mo concentration indicate that the dolomites were deposited in oxic environments, however, most of the black shales were accumulated in euxinic environments. P/Ti values in the Hongshuizhuang samples can be compared with those in the Japanese Ubara Permian-Triassic section which were regarded to be deposited under a moderate to high paleoproductivity. Ba/A1 values are slightly lower than that of the laminated sediments from the continental margins of Central California (CCAL) which were thought to be accumulated under a high paleoproductivity. These results indi- cate that the paleoproductivity was moderate to high during deposition of the Hongshuizhuang Formation. Burial organic carbon shows positive correlations with V/Cr and Mo, but shows only weakly or no correlation with P/Ti and Ba/AI, respectively, sug- gesting that although the paleoproductivity was moderate to high during deposition of the Hongshuizhuang Formation, its organ- ic-rich sediments were predominantly controlled by redox conditions and had no direct relationship with paleoproductivity.