CAJ | 학술논문

本论文通过对研究区，即班公错-怒江缝合带北缘位置的色哇组实测剖面的分析，并结合周围色哇组地层的数据分析得到了关于色哇组的时代界定，大多以古生物化石为主，前人在色哇组中采获较多的化石，主要以菊石化石为主。前人在双湖特别区毕洛错地区采获了大量的菊石，菊石保存较为完好，经鉴定后，其是时代为多为中侏罗世。研究区内色哇组地层岩性也主要以碎屑岩为主夹有砂岩透镜体和礁灰岩。岩相主要为一套浅海陆棚相，从下往上依次从外陆棚过渡到了内陆棚。区域上色哇组以一套陆棚相沉积为主，且总体上，都呈外陆棚亚相向内陆棚亚相过渡，反映了水深向水浅的过渡。这一海平面的变化时受全球海平面变化所致，而不是区域构造活动的产物，此时盆地内发生了两次明显的海侵-海退过程。这也表明整个南羌塘地区均以相对稳定的沉降作用，色哇组的沉积特征表明，此时的班公湖-怒江带是一个较稳定的时期，且进一步佐证此时的班公湖-怒江洋盆并未向北消减。
본논문통과대연구구，즉반공착-노강봉합대북연위치적색왜조실측부면적분석，병결합주위색왜조지층적수거분석득도료관우색왜조적시대계정，대다이고생물화석위주，전인재색왜조중채획교다적화석，주요이국석화석위주。전인재쌍호특별구필락착지구채획료대량적국석，국석보존교위완호，경감정후，기시시대위다위중주라세。연구구내색왜조지층암성야주요이쇄설암위주협유사암투경체화초회암。암상주요위일투천해륙붕상，종하왕상의차종외륙붕과도도료내륙붕。구역상색왜조이일투륙붕상침적위주，차총체상，도정외륙붕아상향내륙붕아상과도，반영료수심향수천적과도。저일해평면적변화시수전구해평면변화소치，이불시구역구조활동적산물，차시분지내발생료량차명현적해침-해퇴과정。저야표명정개남강당지구균이상대은정적침강작용，색왜조적침적특정표명，차시적반공호-노강대시일개교은정적시기，차진일보좌증차시적반공호-노강양분병미향북소감。
In this paper, through the study area , Analysis of the measured of Sewa in Bangongcuo - Nujiang suture zone north edge position , combined with the surrounding Sewa formation era of data analysis has been defined on the Sewa , mostly paleontology fossil -based predecessors in Sewa harvested more fossils , mainly in the petrochemical chrysanthemum stone based. In particular, the former two-Lakes District Bi Luo wrong area harvested a lot of ammonite , ammonites well-preserved , was identified , which is as much as the era of the Middle Jurassic . Sewa in the study area lithology mainly clastic rocks are sandwiched reef limestone and sandstone lenses . Facies are mainly a shallow continental shelf , up sequentially from the transition from the outer continental shelf to the inner shelf . Regional group to set color wow shelf facies , and overall , radiate outer shelf sub opposite inner shelf facies transition , reflecting the transition to a shallow depth . This product changes in sea level caused by global sea level changes , rather than regional tectonic activity in the basin at this time of the occurrence of two distinct transgressive - regressive process. This also indicates that the entire southern Qiangtang region are relatively stable sedimentation , Deposition characteristic Sewa showed that at this time Bangong-Nujiang belt is a relatively stable period , and further evidence at this time Bangong-Nujiang oceanic basin north did not abate .