| 摘要: |
本文的工作区域是按中国地矿部和德国下萨克森州科学和艺术部之间科学台作协议而提供的。在唐家湾地区的中上泥盆统碳酸盐岩中可以见到以下8种微相类型:泥岩、具纹层球粒-颗粒岩/泥粒岩、无纹层球粒-颗粒岩/泥粒岩、介形虫-颗粒岩/泥粒岩、枝状层孔虫-粒泥岩、枝状层孔虫-棘皮类-粒泥岩、生物碎屑-粒泥岩和骨架岩。这些微相类型可指示不同的能量指数及水深。同欧文(Irwin,1965)浅水碳酸盐沉积模式对比,唐家湾泥盆纪(吉维特期和弗拉斯期)属于Y带和Z带沉积,并可分出发育生物丘-生物层的正常海环境、局限浅水沉积环境和潮坪沉积环境。最大水深估计为10m—20m。
唐家湾剖面碳酸盐岩经历了三种早成岩环境:海水成岩环境、大气水成岩环境和混合水成岩环境。其后又经历了晚成岩阶段的压溶、重结晶和交代作用。白云石化部分为混合水成因,部分为晚成岩期交代成因。 |
| 关键词: 碳酸盐岩沉积相 微相类型 成岩作用 |
| DOI： |
| 附件 |
| 投稿时间：1992-08-01 |
| 基金项目: |
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| SEDIMENTARY FACIES AND DIAGENESIS OF THE MIDDLE AND UPPER DEVONIAN CARBONATE ROCKS IN THE TANGJIAWAN SECTION, GUILIN |
| C. Klindworth, W. Schneider, Liu Xiaozeng |
(1. Institute of Geology and Palaeontology, Technologic University of Braunshweig, Germany;
2. Chengdu College of Geology) |
| Abstract: |
The study area is provided for the cooperative project between the Ministry of Geology and Mineral Resources, the People's Republic of China and the Ministry of Science and Art of Niedersachsen, the Federal Republic of Germany. Eight microfacies types may be distinguished for the Middle and Upper Devonian carbonate rocks in the Tangjiawan region, includins mudstone, laminated peloid-grainstone/packstone, unlaminated peloid-grainstone/packstone, ostracode-grainstone/packstone, amphipora-wackestone, amphipora-echinoderm-wackestone, bioclastic wackestone and framestone. These microfacies types indicate varying energy index and water depth. In the light of Irwin sedimentary model (1985) of the shallow-water carbonate rocks, the Devonian(Givetian and Frasnian)strata are assigned to Y and Z zones and to the sedimentary environments of normal seas with bioherm/biostrome, restricted shallow-water and tidal flats. The maximum water depths vary from 10 to 20 m.
The carbonate rocks in the Tangjiawan section may have experinced three types of early diagenetic environments:marine, meteoric and mixed water, followed by pressure solution, recrystallization and replacement in the late diagenetic stages. The dolomitization is interpreted to have a mixed water origin, or a late diagenetic replacement origin. |
| Key words: sedimentary facies of carbonate rocks microfacies types diagenesis |
