發(fā)布時間：2018-01-24 04:40

  本文關(guān)鍵詞： 淮南煤田 微量元素 地球化學(xué)特征 泥頁巖　出處：《煤田地質(zhì)與勘探》2017年02期 　論文類型：期刊論文

【摘要】：泥頁巖中微量元素特征對反演泥頁巖形成時的沉積和古地理氣候條件具有重要意義。采集淮南煤田山西組泥頁巖樣品,利用ICP-MS對泥頁巖中微量元素進行了測試分析,探討了研究區(qū)山西組泥頁巖中微量元素的地球化學(xué)特征及其意義。結(jié)果表明,B、Cr、U、Ga、Li、Sn、Pb、Mo、Th、W等元素富集,Cd、Co、Cu、Ti、Zn、Sc、Ba、Mn、Ni、Sr等元素虧損;揭示淮南煤田山西組形成于溫暖濕潤和半咸水 高咸水的沉積環(huán)境中,沉積體系為開放型,體系內(nèi)為弱氧化 還原環(huán)境,其中以弱還原 還原環(huán)境為主,且表現(xiàn)出從早期弱氧化到中后期的還原環(huán)境的演化特征;依據(jù)U/Th、Ni/Co、Sr/Cu、B/Ga、Sr/Ba、TOC等地球化學(xué)參數(shù)結(jié)果推測,鹽度和氧化還原條件受到多種因素的影響,有機質(zhì)的原始堆積量是影響山西組泥頁巖中有機質(zhì)含量的主要因素,而鹽度和氧化還原條件影響有機質(zhì)中各顯微組分含量。研究區(qū)溫暖濕潤的氣候和較為還原的環(huán)境為有機質(zhì)的堆積和保存提供了有利條件,為頁巖氣的成藏提供了物質(zhì)基礎(chǔ)。
[Abstract]:The characteristics of trace elements in shale play an important role in inversion of sedimentary and paleogeographic climatic conditions during shale formation. The shale samples of Shanxi formation in Huainan coalfield are collected. The trace elements in shale are tested and analyzed by ICP-MS, and the geochemical characteristics and significance of trace elements in shales of Shanxi formation in the study area are discussed. Elements such as Li Sn, Pb, Mo, Th, W and so on are enriched with the depletion of elements such as CD, Co, Cu, Ti, Zn, Zn, S, S, B, mn, M, N, F, Sr, and so on. It is revealed that the Shanxi formation of Huainan coalfield was formed in the sedimentary environment of warm and humid and brackish water with high salt water. The sedimentary system is open and the environment of weak redox is the main one. It also shows the evolutional characteristics of reduction environment from early weak oxidation to middle and late stage. According to the geochemical parameters such as U / T / Ni / Ni / Ni / Cu / Cu / Cu / Ga, Sr / Ba / TOC, it is inferred that the salinity and redox conditions are affected by many factors. The original accumulation of organic matter is the main factor affecting the content of organic matter in shales of Shanxi formation. The salinity and redox conditions affect the maceral content of organic matter. The warm and humid climate and relatively reduced environment in the study area provide favorable conditions for the accumulation and preservation of organic matter. It provides material basis for shale gas accumulation.
【作者單位】： 安徽理工大學(xué)地球與環(huán)境學(xué)院;福建省煤田地質(zhì)勘查院;
【基金】：國家自然科學(xué)基金項目(41302129) 安徽省自然科學(xué)基金項目(1408085QE88) 山西省煤層氣聯(lián)合研究基金項目(2012012008)~~
【分類號】：P618.11
【正文快照】： 引用格式:高德q，

本文編號：1459197