(1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing10037; 2. Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008; 3. Institute of Geographical Sciences and Resources, Chinese Academy of Sciences, Beijing100101; 4. Yunnan Institute of Geological Sciences, Kunming 65005 1)

Temple stage was built by Lu Yu 1959, which originated from the Miao Formation. The named section and stratotype section are located in Guanshan near Zhu Qian Temple in Kunming. At that time, the Yunnan Nanocephala-Redlich ia Walcott trilobite fossil belt was established, and the lower part also included the fishstone layer, that is, the Zhong Yi Village stratum of Kunyang Phosphate Mine. At present, we take Badaowan (24 44' north latitude and 65 438+002 34' east longitude) (Figure 65 438+0) about 65 438+0 kilometers northwest of Shu Mei village in Jinning, Yunnan as the boundary layer, and the Zhu Qian Temple in the northwest suburb of Kunming is about 12 kilometers away from the urban area.

Figure 1 Zhu Qian Temple Stratum and Boundary Stratum Profile Location Map

The bottom boundary of Badaowan section in Meishucun is clear and the biomarkers are obvious. Parabadiella first appeared as the bottom boundary, and the rock combination in this section is shale and siltstone. It is 63.8 meters thick.

The detailed strata, rock characteristics, fossils and thickness are as follows (Luo Huilin, Jiang, Tang, 1994) (Figure 2).

Thick grayish purple and grayish green fine grained timely sandstone mixed with yellow shale in the overlying strata, with yellowish brown conglomerate at the bottom. Jilin Yang and Hunan Wang. ; Plant fossils Protopteris and Pteris parviflora.

Research report on the construction of major dating strata in China: 2006 ~ 2009.

Fig. 2 Stratigraphic profile of Zhu Qian Temple boundary in Badaowan, Shu Mei Village, Jinning, Yunnan.

Lower CAMBRIAN Meishucun Strata

The top layer of 13a is black thin-layer carbonaceous argillaceous quartzite siltstone, and the bottom layer is 0.2m phosphorite, which produces soft-tongued snails, soft-tongued snails, shells, Tomotebes and perforated bones.

Although the bottom boundary of this section is well exposed, and an important trilobite Parabadiella appears for the first time, which can be used as the boundary stratotype, the whole Zhu Qian Temple is not preserved completely, so we have to choose the Zhu Qian Siguanshan section as the stratotype section, which has good outcrop, continuous strata and abundant fossils, and can show the overall appearance of Zhu Qian Temple. The disadvantage is that Parabadiella fossils have not been found yet. This section begins with the appearance of the Palaeoostracod Kunminggela, which is introduced in detail as follows (Luo Huilin, Jiang, Tang, 1994) (Figure 3).

Fig. 3 Section of Lower Cambrian Zhu Qian Temple in Longdong, Zhu Qian Temple.

Canglangpu Formation of overlying strata

Dark gray thick layer-massive dolomite quartzite interbedded with gray thick layer striped dolomite quartzite and silty mudstone. Trace fossils (kq-f-14-1); Archaeichnium sp .

Research report on the construction of major dating strata in China: 2006 ~ 2009.

Research report on the construction of major dating strata in China: 2006 ~ 2009.

Shiyantou member of Qianzhusi Formation in the underlying stratum.

Grayish black (grayish purple after weathering) thin layer argillaceous quartzite, with 0.3 m quartzite containing bioclastic glauconite at the bottom and calcareous sandstone nodules. Small shell fossils (KQ-F-4- 1) occur at a distance of 1.3 m from the bottom, and look like soft-tongued snails. Archiasterella Pentacatina sdzuyutanulina Mul-tiferafonin et Smirnova, a crustacean from Tomot.

At present, we adopt Luo Huilin's opinion (Luo Huilin, 198 1, 1994) to define the terrace of Zhu Qian Temple, taking the first appearance (point D) of Parabadiella, the oldest trilobite in China as the bottom line and the extinction of Eoredlichia or the first appearance of Yiliangella forficula as the end point. It was once thought that Yunnan Head, the highest step of the bamboo temple, appeared in the middle and upper part of Yushan section of Kunming Bamboo Temple, Jinning Shu Mei Village and Chengjiang Maotianshan Mountain, and was contemporaneous with Eoredlichia * * * * so it can be classified as Eoredlichia belt.

On the biostratigraphic level, the Temple Stage can be divided into two trilobite zones, and the lower layer is Permian-like leaf zone, which produces coniform Permian-like leaf insects, Adiantum yunnanense, Adiantum mandshuricum (Zhou), Adiantum grandiflorum-Kunyang-Siluo, Dinji Kobayashi-Luo, Adiantum oblate-Luo and Adiantum Anning-Luo. Paleoostracods: Meitu snail, Joan Hinton snail, Shangliangshan snail, Nancheng snail, Dalongtan snail, Xiaoliangshan snail, Badaowan Emei snail and Songling snail; Soft-tongued Amphibia canaliculata, Amphibia canaliculata, Amphibia canaliculata, Amphibia canaliculata. ; Alonia; Brachiopod Botsfordia cealata (hell); Paraphragmites. ; The suspect is Baltisphaeridium aff. dasyakantum(Tim。 )，Archaeopetusina atava Naum。 Sargassum yunnan net. Microalgae. And so on. The upper zone is composed of three-leaf sawfly zone, middle three-leaf sawfly zone, Yaoshan sawfly zone, Washberg sawfly zone, Karnofsky sawfly zone, Taiwan Province sawfly zone, Taiwan Province sawfly zone, Taiwan Province sawfly zone, Taiwan Province sawfly zone, Taiwan Province sawfly zone, Taiwan Province sawfly zone, Taiwan Province sawfly zone, Taiwan Province sawfly zone, Taiwan sawfly zone, Taiwan sawfly zone and Taiwan sawfly zone. The sawfly in Taiwan Province carries the ancient ostracods: Kundera, Ostracoda parviflora, Ostracoda stenophylla, Ostracoda hirsuta, Ostracoda macrostoma, Ostracoda acuta, Ostracoda Chen, Ostracoda Orthoptera, Ostracoda Oviductus, Ostracoda viviparous, Ostracoda Near, Ostracoda Jiangensis and Ostracoda Wuting. Hello, miss. , bury sp. ; Hyolithellus sp brachiopods include Yunnan East Dragon, Helio Jellyfish and Oriental Sun Snake Head; (Jiang), giant salamander, gill cover fish? Yunnan wild pea, Chengjiang wild pea; Arthropod multi-jointed pronghorn? Illecebrosus Hou, Fuxianhuia proensa Hou, Kuamaia lata Hou, Rhumbicalvaria Acan Thihou, Retifacies abnormalis Hou, Echinosaurus echinodon et al., Urokodia aequalis Hou et al., Odaraia? Hou hesun; Worms: Desmodium tianshanense, Desmodium yunnanense, Desmodium longum, Desmodium China and Desmodium Badaowan; Venusian poisonous lizard; Chen; Jellyfish include blue jellyfish, star jellyfish and Yunnan jellyfish; Leptospira spongiosa Chen et al., Leptospira conical Chen et al., Leptospira Taiwan Province Chen et al., Leptospira parallela Chen et al., Leptospira Oblique Chen et al.; Trace fossils include montanus Richter, Cruzi-ana Beifengwanensis Luo et Gao, qiongzhusiensis Luo, Palaeophycus beifengwanensis Luo, Bifung-ites kunyangensis Luo, Asterosoma sp., Rusophycus sp. and Skolicia. Stipa , Kechia SP; Suspected class Bal-tisphaeridium dubium Volk. ，B.semireticulatum(Tim。 ), Echinococcus multilocularis Xing, Echinococcus minimus atavaNaum. Purple-backed anemone ), Sargassum yunnan net, Archaea. , ancient disk algae. , wrinkled bamboo, awning bamboo. ，Gra-normaginata prima Naum。 Sclerotinia minuta. Taeniasis, etc. The famous Chengjiang fauna in China is located in the Eoredlichia belt, which contains many ancestor molecules of metazoa. Its age is estimated to be around 420 million years ago, which is an important outbreak period in biology.

The lower part of Qianzhusi Stage in eastern Yunnan is black gray-black argillaceous shale and argillaceous siltstone, and the upper part is yellow-green shale and siltstone mixed with thin quartz silty dolomite. The thickness of this step is 137.438+06 m in Qianzhusi section. To the east, shale in Yiliang and Malong areas increased and its particle size became finer. On the rock stratum, Qianzhudian Stage only includes the Yuanshan section of Qianzhusi Formation, including the stratum customarily called "Upper Black". No matter "Lower Black" (Shiyantou section) or "Upper Black" (Yuanshan section), there are particularly abnormal trace elements strontium and strontium. By comparison, the black shale of Niutitang Formation in Guizhou and Tanghe Formation in Zhejiang is very similar to the black shale in eastern Yunnan in geochemical trace elements.

During the Early Cambrian, there were two different trilobite fauna in the world, one was redli-chid fauna and the other was olenellid fauna, both of which belonged to pre-fauna in China. Therefore, it is difficult to accurately compare the temple steps in Zhu Qian and western countries. The old trilobites in the latter fauna include Eofallotaspis, fallotaspis and so on. The key question is whether the earliest trilobites around the world appeared at the same time. Is Parabadella in China the lowest trilobite in China? Even the oldest trilobite in the world? At present, there are still many disputes, and the problem has not been solved. Eoredlichia is produced in Australia; Jell( 1990) thinks that Parabadella also exists in Australia, and it is a synonym for Abadiella. In this way, the steps of Zhu Qian Temple can be compared with the limestone of Willcavelina and limestone of Paarala. In Russia, it can be compared with the Atd-abaian stage for the time being. Looking back at China, it is easier and more credible than the Zhu Qian Temple Terrace in China, which is equivalent to the middle and upper member of Niutitang Formation in northern Guizhou, the upper member of Jiulao Cavern Formation in western Sichuan, Guojiaba Formation in northern Sichuan and Dongshuituo Formation in Three Gorges Gorge.

Take the exam and contribute.

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