line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">The Carboniferous is a suite of un-metamorphosed or slightly metamorphosed sedimentary strata in the northern margin of the Dabie Mountains, and it recorded the information of the provenance and the Paleozoic tectonic evolution. The authors analyze the compositions of major, trace and rare elements, the detrital compositions of sandstone and the dating of detrital zircons in the study area, and investigate the tectonic attribute and evolution of the provenance. Medium-fine grain quartz sandstone and feldspar-quartz sandstone are the major in the study area. The QFL averages of sandstones are Q 76.2%, F 15.9%, L 7.9% and Q/(F+L) 4.26; the major element oxide averages of Carboniferous sandstones are SiOWEIGHT: normal; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">2line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"> 63.69%, Al2line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">O3line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"> 11.25%, MgO 3.66%, CaO 5.15%, Fe2line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">O3Tline !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"> 6.15%, K2line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">O 1.68% and Na2line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">O 0.68%; the part characteristic trace elements like
line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">Th, U, Hf, Sc, Zr, Y have averages of 10.78×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">, 2.64×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">, 4.39×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">, 15.67×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">, 166×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"> and
line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">25.33×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">, respectively; and the ratios of Rb/Sr, Th/U, La/Y, La/Sc and Th/Sc are respectively 1.49, 4.10,
line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">14.75, 31.92 and 0.89; the average of ΣREE is 146.2×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"> (54.11×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">~256.0×10-6line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">), δline !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">Eu is 0.64, light REE
line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">enrichment. La/Yb is 12.58(3.94~15.42), and (La/Yb)Nline !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"> is 9.02. The dating of detrital zircons shows that the
line !important; FONT: 12px/15px ����,verdana; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">major U-Pb age of zircons in Early Carboniferous are about 400~500Ma, while in Late Carboniferous the ages of zircons are mostly 900~1300Ma and secondly 2000~2800Ma. These reveal that the Carboniferous sediment derived from different provenance, including the Early Paleozoic island-arc system, Middle-Late Proterozoic basement of Yangtze Craton, Early-Middle Proterozoic basement of North China.