High-resolution foraminiferal biostratigraphy across the Moscovian/Kasimovian boundary

跨越莫斯科/卡西莫夫边界的高分辨率有孔虫生物地层学

• 批准号: 16540429
• 负责人: UENO Katsumi
• 金额: $ 2.37万
• 依托单位: Fukuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16540429/
• 关键词: foraminifera; fusulinoideans; Moscovian; Kasimovian; Carboniferous; biostratigraphy; correlation; faunal change

In the present research, I studied high-resolution foraminiferal biostratigraphy across the Moscovian/Kasimovian boundary in the Kalinovo section of the Donets Basin, Ukraine, and the Zhongdi section of the Yangtze Platform, China.In the Kalinovo section, the following 12 limestones covering a Moscovian-Kasimovian boundary interval are examined : N_2, N_3, N_3^1, N_3^2, N_3^3, N_5^1, O_1, O_1^1, O_1^2, O_2, O_3, and O_4. In N_2, typical late Moscovian fusuline genera such as Taitzehoella and Fusulina are found. N_3 yields Quasifusulinoides and primitive Protritivcites, suggesting a latest Moscovian age. N_3^3 records the occurrence of Protriticites similar to P. pseudomontiparus and/or P. subschwagerinoides, and is probably already of traditional, early Kasimovian. O_1 is dominated by Obsoletes and Quasifusulinoides, together with rare, primitive Montiparus. This level is possibly correlated to the early part of the traditional, middle Kasimovian. O_2 is rich in typical Montiparus, and … More is assignable to the traditional, middle Kasimovian. In the Kalinovo section, therefore, the traditional base of the Kasimovian can be placed somewhere within the N_3-N_3^3 interval. In Donets, ldiognathodus sagittalis, a current potential marker conodont species for the base of the Kasimovian, occurs first in O_1. Thus, this level is several depositional cycles higher than the traditional base of the Kasimovian.In the latest Moscovian-Kasimovian of the Zhongdi section, five fusuline zones were established: in ascending order, they are the Fusulinella-Fusulina, Protriticites sp. A, Protriticites sp. B, Montiparus, and Triticites Zones. Of them, the Protriticites sp. A Zone records the occurrence of primitive Protriticites that bears fine perforations in its spirotheca. In contrast, advanced Protriticites with definitely coarse perforations comparable with rudimentary keriotheca are found in the Protriticites sp. B Zone. These lines of evidence suggest that the base of the Kasimovian in the Zhongdi section almost coincides with the boundary between the Protriticites sp. A Zone and Protriticites sp. B Zone. Less

在本研究中，我研究了乌克兰顿涅茨盆地卡利诺沃剖面和中国扬子地台中地剖面跨越莫斯科/卡西莫夫边界的高分辨率有孔虫生物地层学。在卡利诺沃剖面中，对覆盖莫斯科-卡西莫夫边界区间的以下 12 个灰岩进行了检查：N_2、N_3、 N_3^1、N_3^2、N_3^3、N_5^1、O_1、O_1^1、O_1^2、O_2、O_3 和 O_4。在N_2中，发现了典型的莫斯科晚期fusuline属，例如Taitzehoella和Fusulina。 N_3 产生 Quasifusulinoides 和原始 Protritivcites，表明最晚的莫斯科时代。 N_3^3 记录了类似于 P.pseudomontiparus 和/或 P.subschwagerinoides 的 Protriticites 的出现，并且可能已经是传统的早期卡西莫夫。 O_1 主要由 Obsoletes 和 Quasifusulinoides 以及稀有的原始 Montiparus 组成。这个水平可能与传统的中期卡西莫夫语的早期部分相关。 O_2 富含典型的 Montiparus，并且……更多可归属于传统的中卡西莫夫族。因此，在卡利诺沃部分，卡西莫夫的传统基可以放置在 N_3-N_3^3 区间内的某个位置。在顿涅茨，ldiognathodus sagittalis 是目前卡西莫夫基部潜在的标记牙形刺物种，它首先出现在 O_1 中。因此，这一层位比卡西莫夫系的传统基底高出几个沉积旋回。在中地剖面的莫斯科-卡西莫夫阶晚期，建立了5个Fusuline带，由高到低依次为Fusulinella-Fusulina、Protriticites sp和Fusulinella-Fusulina。 A，Protririticites sp。 B、Montiparus 和 Triticites 区域。其中，Protririticites sp。一个区域记录了原始 Protriticites 的出现，其螺壳上有细小的穿孔。相比之下，在 Protriticites sp. 中发现了具有与原始keriotheca 相当的粗穿孔的高级 Protriticites。 B区。这些证据表明，中地剖面卡西莫夫阶的基底几乎与 Protriticites sp. 之间的边界重合。 A区和Protririticites sp。 B区。较少的

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