【摘要】：實(shí)測(cè)遼寧省建昌縣冰溝剖面,選擇其為單位層型;開展巖石地層、多門類生物化石和沉積相分析等系統(tǒng)研究,重新厘定陸相阜新階定義。建昌冰溝組主要由礫巖、砂巖、泥巖和煤層組成,分成三個(gè)巖段,第二段為煤系地層。該組為陸相湖盆扇三角洲沉積體系,相序疊置分析屬砂礫壩、分流河道、泥沙坪、泥炭沼澤和洪積平原等沉積環(huán)境。通過研究以葉肢介為主的化石發(fā)生和演變序列,及綜合前人研究資料,阜新階生物地層劃分包括葉肢介組合帶3個(gè)、孢粉化石組合2個(gè)、雙殼類組合1個(gè)和介形蟲組合2個(gè)。底界層型定在小冰溝村西單一淺湖相地層中,生物標(biāo)志為葉肢介Orthestheropsis originalis的始現(xiàn)。依據(jù)孢粉和介形蟲化石資料,阜新階對(duì)比為國際地層表早白堊世巴列姆階(Barremian)~阿爾必階(Albian)。
[Abstract]:The Binggou section of Jianchang County Liaoning Province was measured and selected as unit layer. The definition of Fuxin stage of continental facies was redefined by systematic study of lithostratigraphy multi-family biofossils and sedimentary facies analysis. Jianchang Binggou formation is mainly composed of conglomerate, sandstone, mudstone and coal seam. This group is a continental lacustrine basin fan delta sedimentary system. The facies sequence superposition analysis belongs to sandy gravel dam, distributary channel, sediment flat, peat swamp and alluvial plain. By studying the sequence of fossil genesis and evolution mainly in phyllodes and synthesizing the previous research data, the biostratigraphic division of Fuxin is composed of 3 lamellar assemblages, 2 sporopollen fossil assemblages, 1 bivalve assemblage and 2 ostracods assemblages. The bottom boundary layer is defined in Xidan-shallow lacustrine facies of Xiaobingou Village, and the biomarker is the beginning of Orthestheropsis originalis. Based on the data of sporopollen and ostracoda fossils, Fuxin stage correlation is that the international stratigraphic surface early Cretaceous Barrem stage (Barremian) ~ Albim stage (Albian).
【作者單位】： 中國地質(zhì)科學(xué)院地質(zhì)研究所;中國地質(zhì)科學(xué)院礦產(chǎn)資源研究所;
【基金】：中國地質(zhì)調(diào)查局和全國地層委員會(huì)項(xiàng)目(編號(hào):1212011120142) 國家自然科學(xué)基金項(xiàng)目(編號(hào):41472027;41572098)聯(lián)合資助~~
【分類號(hào)】：P534.53

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