本文選題：AITs + 鉆孔微生物��； 參考：《科學(xué)通報(bào)》2017年35期

【摘要】：陜南西鄉(xiāng)張家溝剖面的寒武紀(jì)寬川鋪組中產(chǎn)出的磷酸鹽化微體化石上大量保存了一種微型管道結(jié)構(gòu),被解釋為異質(zhì)體拖曳跡(ambient inclusion trails,AITs).同時(shí)報(bào)道并討論了與化石相關(guān)的3種AITs新現(xiàn)象:(1)AITs及與其共生的鉆孔藍(lán)細(xì)菌和鉆孔真菌化石.通過直接對比揭示了三者在形態(tài)和保存模式上的不同,進(jìn)一步澄清了區(qū)分類似結(jié)構(gòu)的生物成因和非生物成因的標(biāo)準(zhǔn).(2)罕見的有機(jī)碳質(zhì)的AITs末端推進(jìn)顆粒.常見的AITs一般是由黃鐵礦顆粒的運(yùn)移造成,碳質(zhì)末端顆粒的發(fā)現(xiàn)可以進(jìn)一步豐富AITs成因和形態(tài)多樣化的解釋,還得以通過碳質(zhì)物的拉曼光譜地質(zhì)溫度計(jì),推測出化石群埋藏后經(jīng)過了極低變質(zhì)作用.(3)AITs在原牙形類化石上呈環(huán)繞分布.根據(jù)AITs的形成機(jī)制對這一現(xiàn)象進(jìn)行分析探討,從側(cè)面佐證了原牙形類化石刺體的原始成分為有機(jī)質(zhì),并且在成巖過程中經(jīng)歷次生磷酸鹽化的觀點(diǎn).
[Abstract]:A large number of Phosphate microfossils from the Cambrian Kuanchuan formation in Zhangjiagou section, Xixiang, southern Shaanxi Province, have preserved a large number of microtubing structures, which are interpreted as the heterogeneous inclusion trails of AITs. At the same time, three new phenomena of AITs related to fossils are reported and discussed. They are the cyanobacteria and the fossils of borehole fungi associated with AITs. By direct comparison, the differences in morphology and conservation patterns among the three are revealed, further clarifying the rare AITs terminal propelling particles of organic carbon, which are the criteria for distinguishing biogenic and abiogenic organisms with similar structures. The common AITs are generally caused by the migration of pyrite particles. The discovery of carbon terminal particles can further enrich the explanation of the origin and morphology of AITs. It is inferred that the metamorphism of the metamorphism is very low after burial. The AITs of the metamorphism are surrounded by the protoodontic fossils. According to the formation mechanism of AITs, this phenomenon is analyzed and discussed, which proves the viewpoint that the original composition of the proodontoid fossil spines is organic matter and experienced secondary phosphate during diagenesis.
【作者單位】： 西北大學(xué)地質(zhì)學(xué)系大陸動力學(xué)國家重點(diǎn)實(shí)驗(yàn)室陜西省早期生命與環(huán)境重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(41772010,41621003,41720104002) 現(xiàn)代古生物學(xué)和地層學(xué)國家重點(diǎn)實(shí)驗(yàn)室基金(163107) 教育部高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃(D17013)資助
【分類號】：P534.41;Q911.2
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本文編號：1997347