摘要
湘黔川三省交界地区的上元古界震旦系南华冰碛组合构成了一个完整的顶底界由２个１型层序界面（不整合面）所限定的沉积层序，该层序由下往上可划分为低水位体系域、海侵体系域、凝缩层、早期高水位体系域和晚期高水位体系域，其中的海侵体系域沉积序列为区内工业碳酸锰矿床的唯一赋矿层位。另外，还对松桃凉风坳锰矿段内的大塘坡组（Ｚ１ｄ）／铁丝坳组（Ｚ１ｔ）的地层界线提出了新的划分意见，并用现代沉积学理论加以论证。
The Sinian South-China moraine assemblage of the upper Proterozoic distributed in the conjunction of three provinces, Hunan, Guizhou, and Sichuan, has been recognized as a complete sequince bounded below and above by type 1 sequence boundaries, which can be subdivided into a lowstand system tract, a transggressive system tract, a condensed section, and two highstand system traits separated in the early and late stage. The valuable rhodochrosite deposits unique in this area to industrial production occur in the transgressive systtem tract. Besides, the stratigraphical boundary between the Datangpo Formation (Z1d) and the Tiesiao Formation (Z1t) has also been discussed in the modern sedimentary theory and a new boundary division is presented in this paper.
出处
《贵州地质》
1995年第3期233-239,共7页
Guizhou Geology
