全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地质论评  2004 

安徽铜陵矿集区硅质岩成因及意义

Keywords: 热水沉积型矿床硅质岩二叠系成因铜陵地区层控矿床找矿标志

Full-Text   Cite this paper   Add to My Lib

Abstract:

铜陵地区二叠系栖霞组到大隆组(P_1q―P_2d)各层位中硅质岩分布广泛。通过野外地质填图过程中的详细观察和硅质岩常量元素、稀土元素和微量元素的分析,结果表明,这些硅质岩是热水活动间歇式、多次活动的结果。硅质岩构成铜陵地区二叠系主要的矿(源)层或矿胚层(Protore)之一。硅质岩具有低Fe_2O_3/FeO、SiO_2/Al_2O_3、SiO_2/(K_2O+Na_2O)、SiO_2/MgO、MnO_2/TiO_2值;低Co高Ni,Co/Ni<1,U/Th>1;低∑REE,负Ce异常,重稀土相对富集等热水沉积物的特征,为热水沉积的结果。氧同位素估算的热水古温度为49~249℃(高温部分有后期岩浆的叠加扰动)。硅质岩是铜陵地区二叠系层控矿床的重要找矿标志,对于隐伏矿床的寻找和矿产预测具有重要意义。

References

[1]  何科昭,赵崇贺,邰道乾,聂泽同,乐昌硕,周正国.1996.赣东北蛇绿混杂岩带中多处发现含晚古生代放射虫硅质岩.现代地质,10(3):303~307.
[2]  侯增谦,吴世迎,Urabe.1996.四川呷村黑矿型矿床的硅质岩的硅、氧同位素组成及其与现代海底硅质烟囱比较研究.地质论评,42(6):531~539.
[3]  孔玉庆,龚与勤.1986.安徽巢县下二叠统茅口阶放射虫硅质岩的发现及其地质意义.地质论评,32(5):505~510.
[4]  夏邦栋,钟立荣,方中,吕洪波.1995.下扬子区早二叠世孤峰组层状硅质岩成因.地质学报,69(2):125~137.
[5]  张复新.1989.秦岭泥盆系中与铅锌矿化有关喷流岩的识别与找矿.地质与勘探,第5期:11~18.
[6]  赵江天,夏林圻,夏祖春,徐学义.1999.北祁连山大陆裂谷硅质岩的稀土元素判别.科学通报,44(6):665~669.
[7]  周永章,涂光炽,ChownE H,Guha J,卢焕章.1994.粤西古水剖面震旦系顶部层状硅岩的热水成因属性:岩石学和地球化学证据.沉积学报,12(3):1~11.
[8]  周永章.1990.丹池盆地热水成因硅岩的沉积地球化学特征.沉积学报,8(3):75~83.
[9]  朱雅林.安徽铜官山背斜石炭纪地层中火山岩的发现及其意义.地质与勘探,1992,(9):8.
[10]  Bostrom K, Rydell H, Joensuu O. 1979. Langbank: an exhalative sedimentary deposit. Econ. Geol. , 74(5): 1002~1011.
[11]  Clayton R N, O\'Neil J R, Mayeda T K. 1972. Oxygen isotope exchange between quartz and water. J. Geophys. Res. 77:3057~3067.
[12]  Crerar D A, Namson J, Chyi M S, et al. 1982. Manganiferous chert of the Franciscan assemblage: I. General geology ancient and modern analogues and implications for hydrothermal convetion at oceanic spreading centers. Econ. Geol. , 77(3): 519~540.
[13]  He Kezhao, Zhao Chonghe, Tai Daoqian, Nie Zetong, Yue Changshuo, Zhou Zhengguo, Ye Nan. 1996. Discovery of Late Palaeozoic Radiolarian Silicalite in Many Places in Northeastern jiangxi Ophiolitic Melange Belt. Geoscience (Journal of Graduate School, China University of Geosciences), 10(3): 303~307 (in Chinese with English abstract).
[14]  Hou Zengqian, Wu shiying, Urabe T. 1996. Silicon and oxygen isotopic composition of cherts from the Gacuz Kuroko-type deposit, Sichuan, and comparison with silica chimneys from the modern seafloor. Geological Review, 42 ( 6 ): 531 ~ 539 (in Chinese with English abstract).
[15]  Kong Yuqing, Gong Yujin. 1986. Discovery of radiolarian siliceous rocks in the Maokou Stage of the Lower Permian in Chaoxian,Anhui, and their geological significance. Geological Review, 32(5): 505~510(in Chinese with English abstract).
[16]  Lottermoser B G. 1989. Rare earth element study of exhalites within the Willyama Supergroup, Broken Hill block, Australia.Mineralium Deposita, 24 : 92~ 99.
[17]  Lottermoser B G. 1991. Trace element composition of exhalites associated with the Broken Hill sulfide deposit, Australia. Econ.Geol. , 86: 870~ 877.
[18]  Marchig V, Gundlach H, Moiler P, et al. 1982. Some geological indicators for discrimination between diagenetic and hydrothermal metalliferous sediments. Marine Geology, 50 (3): 241 ~ 256.
[19]  Mortlock R A, Froelich P N, Feely R A, et al. 1993. Silica and germanium in Pacific Ocean hydrothermal vents and plums. Earth and planetary Science Letters, 119: 379 ~ 386.
[20]  Murray R W, Buchholtz T, Jones D L, et al. Rare earth elements as indicators of different marine depositional environments in chert and shale. Geology, 18: 268~271.
[21]  Murry R W, Brink M R B, Jones D L et al., 1990. Rare earth elements as indicators of different marine depositional environments in chert and shale. Geology,18(3): 268~271.
[22]  Pokrovski G S, Schott J. 1998. Thermodynamic properties of aqueous Ge( Ⅳ ) hydroxide complexes from 25 to 350℃ :Implications for behavior of germanium and the Ge/Si ratio in hydrothermal fluids. Geochem. Cosmochem. Acta, 62: 1631~1642.
[23]  Zhu Yalin. 1992. Discovery of Carboniferous volcanic rock in Tongguanshan Anticline, Anhui and its significance. Geology &Exploration, (9): 8(in Chinese with English abstract).
[24]  许靖华.1980.沉积学讲座讲稿汇编.中国地质科学院成都地质矿产研究所编.
[25]  徐跃通.1997.鄂东南晚二叠世大隆组层状硅质岩成因地球化学及沉积环境.桂林工学院学报,17(3):204~212.
[26]  杨建民,王登红,毛景文,张作衡,张招崇,王志良.1999.硅质岩岩石化学研究方法及其在"镜铁山式"铁矿床中的应用.岩石矿物学杂志,18(2):100~112.
[27]  姚林波,高振敏,杨竹森,等.2002.鱼塘坝硒矿床富硒硅质岩的成因.中国科学(D辑),32(1):54-63.
[28]  Boatrom K, Kraemer T, Gartners S. 1973. Provenance and accumulation rates of opaline silica, Al, Fe, Ti, Mn, Ni, and Co in Pacific pelagic sediment. Chemical Geology, 11(1~2): 123~148.
[29]  Rona P A. 1988. Hydrothermal mineralization at oceanic ridges.Journal of mineralogical association of Canada, 226 (3): 431 ~465.
[30]  Rona P A. 1988. Hydrothermal mineralization of oceanic ridges.Canadian Geology, 2693): 447~465.
[31]  Shimizu H, Masuda A. 1977. Cerium in chert as an indication of marine environment of its formation. Nature, 266: 346~346.
[32]  Ward C D, McArthur J M. 1992. Rare earth element behavior during evolution and alteration of the Dartmoor graite, SW England.Journal of Petrology, 33: 785 ~ 815.
[33]  Xia Bangdong, Zhong Lirong, Fang Zhong and Lu Hongbo. 1995.The origin of bedded cherts of the Early Permian Gufeng Formation in the Lower Yangtze area, eastern China. Acta Geologica Sinica, 8 (4): 372 ~ 386 (in Chinese with English abstract).
[34]  Xu Yuetong. 1997. Genetic Geochemistry for the bedded silicalite in the late permian dalong formation and its sedimehtary setting in southeastern Hubei. Journal of Guilin Institute Of Technology, 17(3): 204~212(in Chinese with English abstract).
[35]  Yang Jianmin, Xue Chunii, Xu Jue, et al. 2001. Geological features and mineralization of the Himalayan alkalic porphyry in Western Yunnan. In: Chen Yuchuan, et al, ed. Study on Himalayan endogenic mineralization, 57- 68. Beijing: Seismic Publishing House, 57~68 (in Chinese with English abstract).
[36]  Yamamoto K. 1987. Geological characteristics and depositional environments of cherts and associated rocks in the Franciscan and Shimanto terranes. Sedimentary Geology, 52(1~2): 65~108.
[37]  Yao Linbo, Gao Zhenmin, Yang Zhusen, et al. 2002. Genesis of selenium rich cherts from Yutangba Selenium Deposit, Hunan.Science in China(series D), 32(1): 54~63.
[38]  Zhang Fuxin. 1989. Recognition and prospecting of Devonian exhalite related to Pb-Zn mineralization in West Qinling Mt. Geology &Exploration, (5): 11~18(in Chinese with English abstract).
[39]  Zhao Jiangtian, Xia Linqi, Xia Zuchun, Xu Xueyi. 1999.Discrimination of REE of cherts from the North Qilian Mt.Continental Rift. Chinese Bulletin of Science,44(6):665~669(in Chinese with English abstract).
[40]  Zhou Yongzhang, Tu Guangzhi, Chown E H,Guha J, Lu Huanzhang.1994. Hydrothermal origin of top Sinian chert formation at Gushui, Western Guangdong, China: petrologic and geochemical evidence. Acta Sedimentologica Sinica, 12 ( 3 ): 1 ~ 11 ( in Chinese with English abstract).
[41]  Zhou Yongzhang. 1990. On sedimentary geochemistry of siliceous rocks originated from thermal water in Nandan- Hechi Basin.Acta Sedimentologica Sinica, 8 (3): 75 ~ 83 (in Chinese with English abstract).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133