The Cretaceous Orogenic Cycles and Sedimentary Basins in Hokkaido
The Cretaceous Orogenic Cycles and Sedimentary Basins in Hokkaido
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白垩纪造山旋回与北海道沉积盆地
DOI：
10.3720/japt.28.54
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发表时间：
1963
期刊：
影响因子：
--
通讯作者：
K. Kinoshita
中科院分区：
文献类型：
--
作者：
K. Kinoshita
摘要：根据造山旋回，北海道白垩纪层序可分为两大类。第一造山旋回的机构起源于鄂霍次克海，使盆地向西南方向移动。下白垩统(新统塞诺木期)地层就是在这个旋回中沉积的。第二次是本州弧抬升造成的，盆地向东移动，从本州岛西部向东太平洋移动。在这个旋回中，沉积了上白垩统(图罗尼亚-马斯特里赫特)组。每个主要周期都有两个次要周期。前者是在新古代人和阿普提安人之间，后者是在坎帕尼亚人和梅斯特里赫特人之间。与它们相对应，每一种动物都可以被识别出几个突破口。特别是，塞诺尼亚人和都灵人之间的动物群断裂是最主要的。图1-4显示了每种地层的等厚图。图5显示了从东到西的沉积剖面。
Abstract: The Cretaceous sequence in Hokkaido might be classified two major groups by the orogenic cycles. The agency of the first orogenic cycle origenated in Okhotsk Sea and shift the basin in the direction of south-west. It is in the cycle that the Lower Cretaceous (Neocomian-Cenomanian) formations were deposited. The second that was caused by the elevation of the Honshil arc moved the basin in the direction of east, from the western Honshu are to the eastern Pacific Ocean. In this cycle, the Upper Cretaceous (Turonian-Maestrichtian) formation were deposited. Each of the major cycles has two minor cycles. The former break of them is between the Neocomian and Aptian, and latter between the Campanian and Maestrichtian. Corresponding with them, each several breaks of fauna could be recognized. Particularly, the faunal break between the Cenomanian and Turonian is most dominant. The isopach maps of each formation are shown, Figs. 1-4. The depositional cross section from east to west is shown, Fig. 5.