安徽地质
安徽地質
안휘지질
GEOLOGY OF ANHUI
2014年
1期
7-9,22
,共4页
程成%李双应%稽在飞%王松%杨栋栋%张强
程成%李雙應%稽在飛%王鬆%楊棟棟%張彊
정성%리쌍응%계재비%왕송%양동동%장강
微体化石%牙形石%虫颚%奥陶纪%安阳山%霍邱
微體化石%牙形石%蟲顎%奧陶紀%安暘山%霍邱
미체화석%아형석%충악%오도기%안양산%곽구
micro fossils%conodont%scolecodont%Ordovician%Anyang Mt%Huoqiu
最近的研究表明,安徽霍邱地区安阳山(白大山)剖面下部碳酸盐岩段属于晚石炭世,上部碎屑岩段属于青白口纪。我们进一步对剖面进行了微体古生物分析,在晚石炭世碳酸盐岩中发现了丰富的微体古生物化石,其中以牙形石和虫颚化石数量最多。经鉴定,有牙形石Belodina和虫颚化石Marlenites marginatus,Chairidogenys borealis,Cornugenys sp.,Porrhogrnys sp.,Channahania sp.,Paradrilonersgenys cherylae等,Belodina时代为晚奥陶世,虫颚化石的时代为奥陶纪。晚石炭世地层中存在奥陶纪化石,表明可能存在奥陶系的物源区,微体化石是通过剥蚀、搬运再沉积保存到晚石炭世碳酸盐岩中。显然,新发现的微体化石可能并不具有地层意义,但是具有古地理和古构造意义。
最近的研究錶明,安徽霍邱地區安暘山(白大山)剖麵下部碳痠鹽巖段屬于晚石炭世,上部碎屑巖段屬于青白口紀。我們進一步對剖麵進行瞭微體古生物分析,在晚石炭世碳痠鹽巖中髮現瞭豐富的微體古生物化石,其中以牙形石和蟲顎化石數量最多。經鑒定,有牙形石Belodina和蟲顎化石Marlenites marginatus,Chairidogenys borealis,Cornugenys sp.,Porrhogrnys sp.,Channahania sp.,Paradrilonersgenys cherylae等,Belodina時代為晚奧陶世,蟲顎化石的時代為奧陶紀。晚石炭世地層中存在奧陶紀化石,錶明可能存在奧陶繫的物源區,微體化石是通過剝蝕、搬運再沉積保存到晚石炭世碳痠鹽巖中。顯然,新髮現的微體化石可能併不具有地層意義,但是具有古地理和古構造意義。
최근적연구표명,안휘곽구지구안양산(백대산)부면하부탄산염암단속우만석탄세,상부쇄설암단속우청백구기。아문진일보대부면진행료미체고생물분석,재만석탄세탄산염암중발현료봉부적미체고생물화석,기중이아형석화충악화석수량최다。경감정,유아형석Belodina화충악화석Marlenites marginatus,Chairidogenys borealis,Cornugenys sp.,Porrhogrnys sp.,Channahania sp.,Paradrilonersgenys cherylae등,Belodina시대위만오도세,충악화석적시대위오도기。만석탄세지층중존재오도기화석,표명가능존재오도계적물원구,미체화석시통과박식、반운재침적보존도만석탄세탄산염암중。현연,신발현적미체화석가능병불구유지층의의,단시구유고지리화고구조의의。
A latest research indicated that carbonate rock member in the lower part of the Anyang Mt (Baida Mt) section, Huoqiu, Anhui belongs to late Carbonaceous epoch, clastic rock member in the upper part to Qingbaikouan period. Further micropaleonlogical analysis found abundant such fossils in the late carbonaceous carbonate rock, of which conodont and scolecodont fossils dominate in quantity. Identified conodont is Belodina, scolecodonts include Marlenites marginatus,Chairidogenys borealis,Cornugenys sp.,Porrhogrnys sp.,Channahania sp.,Paradrilonersgenys cherylae, etc. Belodina dated back to late Ordovician epoch and scolecodonts Ordovician period. Ordovician fossils occurring in later Carbonaceous epoch suggested that there may have been an Ordovician source of micro fossils, which were eroded, transported, re-deposited and preserved in late Carbonaceous carbonate rock. Obviously, this discovery may not be significant stratigraphically, but paleogeographically and paleotectonically.