CAJ | 학술논문

西藏改则上三叠统日干配错组发育了一套厚度较大的碳酸盐岩台地相沉积。利用研究区内39件碳酸盐岩样品的常量元素和微量元素相关关系、组分含量及特征元素的比值特征，来探讨元素地球化学特征与沉积环境的关系。研究表明，①Mn ／Sr值均小于1，平均值为0．28，表明碳酸盐岩基本没有受到成岩作用的影响；②Al2 O3、K2 O 和 Fe 2 O3呈正相关关系，它们与 GaO 呈负相关关系，与 Ni、V 呈正相关关系；Fe 2 O3与 Mn、Ba、Ni 呈正相关关系；③Sr、V、Ba、Mn 含量从浅水到深水环境总体呈增加趋势；④根据 Sr、K、Na、Ca 含量、Sr／Ba、V ／（V＋Ni）值特征分析了日干配错组沉积期的古气候和古环境。结果显示，日干配错组总体上为温暖潮湿气候下的陆表海还原沉积环境，显现出海侵的趋势。
서장개칙상삼첩통일간배착조발육료일투후도교대적탄산염암태지상침적。이용연구구내39건탄산염암양품적상량원소화미량원소상관관계、조분함량급특정원소적비치특정，래탐토원소지구화학특정여침적배경적관계。연구표명，①Mn ／Sr치균소우1，평균치위0．28，표명탄산염암기본몰유수도성암작용적영향；②Al2 O3、K2 O 화 Fe 2 O3정정상관관계，타문여 GaO 정부상관관계，여 Ni、V 정정상관관계；Fe 2 O3여 Mn、Ba、Ni 정정상관관계；③Sr、V、Ba、Mn 함량종천수도심수배경총체정증가추세；④근거 Sr、K、Na、Ca 함량、Sr／Ba、V ／（V＋Ni）치특정분석료일간배착조침적기적고기후화고배경。결과현시，일간배착조총체상위온난조습기후하적륙표해환원침적배경，현현출해침적추세。
The Riganpeicuo Formation in Garze,Tibet,is a series of carbonate platform facies strata.By the geochemical analysis of 39 carbonate samples,this paper discusses the sedimentary geochemistry characteristics and the palaeosedimen-tary environment significance of the Riganpeicuo Formation.The results indicate that:①Mn /Sr ratio of all tested samples is less than 1,with the mean value of 0.28,which shows that the Riganpeicuo Formation carbonate rocks were little af-fected by the diagenesis.②Al2 O 3 ,K2 O and Fe 2 O 3 are positively correlated,they negatively correlate with GaO,and posi-tively correlate with Ni,V;Fe 2 O 3 correlates positively with Mn,Ba,and Ni.③the contents of Sr,V,Ba,Mn,show an deepening trend from shallow to deep water environment.④according to the contents of Sr,K,Na,Ca and the ratio char-acteristics of Sr /Ba,V /(V+Ni)etc.,this paper analyzes the paleoclimate and palaeoenvironment of development period of the Riganpeicuo Formation.In brief,the Riganpeicuo Formation is epicontinental deposits developed in warm humid cli-mate and reducing environment,with a transgressive process.