西藏班公湖-怒江结合带木嘎岗日岩群时代上限的新证据——来自恐弄拉地区早白垩世早期孢粉化石的报道

The new evidence for the upper limit of Mugakangri group-complex from Bangong-Nujing junction zone, Tibet: Reports from early Early Cretaceous palynoflora in Kongnongla area, Bangor County, Tibet

摘要: 在班公湖-怒江结合带中段的恐弄拉地区木嘎岗日岩群其西弄岩组中发现早白垩世早期Dicheiropollis sp.（双手粉）和Cicatricosisporites sp.（无突肋纹孢）孢粉组合。明确了木嘎岗日岩群的沉积上限至少持续到早白垩世早期，为从生物年代学角度厘定木嘎岗日岩群提供了可靠的资料，也为今后进-步分析班公湖-怒江结合带中生代盆地演化提供了线索。

Abstract: Early Early Cretaceous palynoflora such as Dicheiropollis and Cicatricosisporites were found in Qixinong Formation of Mugakangri group-complex along the central segment of the Bangong-Nujiang junction zone, Tibet, and this discovery proves that the upper sedimentary limit of Mugakangri group-complex at least lasted until early Early Cretaceous, provides true and reliable paleontological data for determining Mugakangri group-complex in the light of biological chronology, and supplies clues for further analysis of Mesozoic basin evolution of the Bangong-Nujiang junction zone.