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1 地质概况 津屋崎组主要分布于福冈以北20km的津屋崎町,为非海相早第三纪地层(图1)。虽然与福冈煤田及东面的宗像煤田为单独分布,但通过对所产出的花粉和胞子化石研究表明,它可与筑丰煤田中的远贺层对比(高桥,1962)。在津屋崎组之上,叠覆了产有芦屋群中贝化石的山鹿层,可视为远贺层相当层。该层总厚度为390～400m,其特征是含有大量火山堆积物。因岩相不同,故以第1亚层到第5亚层可划分5层(冈田等,1963)。本文所述的火山碎屑流堆积物夹于第4亚层B中(图1)。即以前研究记载的流纹岩质─石英安山岩质凝灰岩。 夹有火山碎屑流堆积物的津屋崎组上部,构成了向西北缓缓抬起的向斜构造,地层呈水平或15°倾斜(图1)。整个津屋崎组遭受到沸石相的变质作用,产生了辉沸石─方沸石亚相的沸石及伊利石─蒙脱石混合层矿物。2 恋浦凝灰岩段 本文所研究的火山碎屑堆积物位于津屋崎町西北部的半岛西岸,沿恋浦海蚀崖连续出露(图1)。在那里有3层火山碎屑流堆积物和1层火山碎屑火山砾和下落的火山灰沉积物、1层火山性泥石流堆积物及夹在其间的河流沉积物组合成厚约9m的地层,将之称为恋浦凝
1 Geological Survey Tsugarumasaki Formation is mainly located in Tsujusaki-cho, 20km north of Fukuoka, which is a non-marine Early Tertiary formation (Figure 1). Although distributed separately from the Fukuoka and Zongsang coalfields to the east, the study of the pollen and fossil fossils produced shows that it is comparable to that of the Hitachi Heights in the Tsukui coalfield (Takahashi 1962). On the Tsutsugurazaki Formation, the mountain deer layer, which contains the shellfish fossil from Ashiya Group, is superimposed on the Tsugyaluzaki Formation and can be regarded as a considerable layer of the Far-Hell. The total thickness of this layer is 390 ~ 400m, which is characterized by a large amount of volcanic deposits. Because of the different lithofacies, it can be divided into five layers from the first sub-layer to the fifth sub-layer (Okada et al., 1963). The pyroclastic flow deposits described herein are sandwiched in Layer 4 sublayer B (Figure 1). Rhyolite-quartz andesitic rock tuff recorded in previous studies. The upper part of the Tsutsugasezaki Formation, where the pyroclastic flow deposits are trapped, constitutes a syncline structure that is slowly lifted to the northwest and is either horizontal or 15 ° inclined (Figure 1). The entire Tsuyizaki Formation suffered metamorphism of the zeolite facies and resulted in the combination of a stilbite-analcime subfacial zeolite and an illite-smectite mixed-layer mineral. 2 Love Puff tuff section The volcanic debris deposit studied in this paper is located in the west bank of the peninsula in the northwestern part of Tsuyizaki-cho and emerges continuously along the cliff of Pu Hai sea (Figure 1). There, there are three layers of pyroclastic flow deposits and one volcaniclastic volcanic gravel and falling volcanic ash deposits, one volcanic debris flow deposits and river sediments sandwiched between them into a formation of about 9m in thickness, Known as love Pu condensate