本文關(guān)鍵詞： 西藏 康托組 阿布山組 牛堡組 沉積相　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：論文依托1:5萬(wàn)區(qū)域地質(zhì)填圖,研究西藏尼瑪縣榮瑪鄉(xiāng)原康托組沉積相與沉積環(huán)境,取得以下主要成果和認(rèn)識(shí):(1)在野外實(shí)測(cè)的基礎(chǔ)上,根據(jù)巖性、巖相特征及區(qū)域地層對(duì)比,對(duì)研究區(qū)原“康托組”進(jìn)行了厘定,將其自下而上劃分為下白堊統(tǒng)阿布山組、古近系始新統(tǒng)-始新統(tǒng)牛堡組和新近系康托組。(2)根據(jù)巖性、沉積構(gòu)造及含化石特征,在阿布山組、牛堡組與康托組劃分出3個(gè)沉積相、6個(gè)沉積亞相和11個(gè)沉積微相。(3)根據(jù)剖面相序結(jié)構(gòu)分析,認(rèn)為原“康托組”至少可以劃分出5個(gè)沉積旋回,其中阿布山組1個(gè)、牛堡組3個(gè)、康托組1個(gè)�？紤]到研究區(qū)各組均無(wú)頂無(wú)底,實(shí)際旋回?cái)?shù)應(yīng)更多。
[Abstract]:Based on the regional geological mapping of 1: 50 000, this paper studies the sedimentary facies and sedimentary environment of the original Kangto formation in Rongma Township, Nima County, Tibet. The main achievements and understanding are as follows: (1) on the basis of field measurements, according to lithology. Lithofacies characteristics and regional stratigraphic correlation, the former "Kangto formation" in the study area was determined and divided from the bottom to the top into the lower Cretaceous Abu Mount formation. Paleogene Eocene Eocene Niupu formation and Neogene Kangto formation. 2) according to lithology, sedimentary structure and fossil bearing characteristics, there are three sedimentary facies in Abu Shan formation, Niupu formation and Kanto formation. 6 sedimentary subfacies and 11 sedimentary microfacies. According to the analysis of facies sequence structure of the section, it is considered that the original "Kangto formation" can be divided into at least 5 sedimentary cycles, of which 1 is the Abu Mountain formation and 3 are the Niupu formation. Conto group 1. Considering that there is no top and bottom in each group in the study area, the actual cycles should be more.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P512.2;P535

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