K－Ar测年法在确定沉积岩成岩时代中的应用——以鄂尔多斯盆地为例
-
摘要:
根据伊利石Ｋ－Ａｒ测年法研究，确定鄂尔多斯盆地存在两期与构造运动有关的成岩作用事件：即与早期燕山运动有关的侏罗纪（１７０—１６０Ｍａ）和与晚期加里东运动有关的志留－泥盆纪（４２０－３７０Ｍａ）成岩作用时代。为了揭示碎屑物质对Ｋ－Ａｒ年龄的影响和伊利石成岩作用的机制，本文提出了一个通过观察Ｋ－Ａｒ年龄随深度变化的趋势来进行判断的模式。在Ｋ－Ａｒ年龄小于地层时代的条件下，Ｋ－Ａｒ年龄与深度呈正相关，或者很相近的Ｋ－Ａｒ年龄与深度变化无关均标志着没有或很少有碎屑物质的影响；同时，前者指示逐渐埋藏条件下的成岩作用，而后者则反映短暂的热事件引起的成岩作用事件。
Abstract:根据伊利石Ｋ－Ａｒ测年法研究，确定鄂尔多斯盆地存在两期与构造运动有关的成岩作用事件：即与早期燕山运动有关的侏罗纪（１７０—１６０Ｍａ）和与晚期加里东运动有关的志留－泥盆纪（４２０－３７０Ｍａ）成岩作用时代。为了揭示碎屑物质对Ｋ－Ａｒ年龄的影响和伊利石成岩作用的机制，本文提出了一个通过观察Ｋ－Ａｒ年龄随深度变化的趋势来进行判断的模式。在Ｋ－Ａｒ年龄小于地层时代的条件下，Ｋ－Ａｒ年龄与深度呈正相关，或者很相近的Ｋ－Ａｒ年龄与深度变化无关均标志着没有或很少有碎屑物质的影响；同时，前者指示逐渐埋藏条件下的成岩作用，而后者则反映短暂的热事件引起的成岩作用事件。
-
Key words:
- illite K Ar dating /
- diagenetic age /
- jurassic /
- silurian-devonian ordos Basin /
-
[1] 1.Weaver C E and Wampler J M. K, Ar, illite burial. Geol Soc Am Bull, 1970,81: 2423-2430.
2.Perry E A Jr. Diag enesis and the K-Ar dating of shales and clay minerals. Geol Soc Am Bull, 1974, 85: 827 —830.
3.Aronson J L and Hower J. M echanism of burial metamorphism of argillaceous sediments: 2. Radiog enic arg on evi-dence. Geol Soc Am Bull, 1976, 87:738-744.
4.Bonhomme M G and Millot G. Generalized diag enetic event of Middle Jurassic age (170- 160 Ma) in the Lower Rhone Basin and the Cev ennes sedimentary cover (France). K-Ar ages of Triassic and Lower Liassic clays. C R Acad, Sc Paris, 1987, 304:431-434.
5.Lee M, et al. Timing and condition of Permian Rotliegends sandstone diagenesis, Southern North Sea: K-Ar and Ox yg en Isotopic Data. AAPG Bull, 1989, 73: 195-215.
6.Ahrendt H, et al. K / Ar - Altersdatierung an authig enen Illiten des Gasfeldes Thoense. Nds Akad Geowiss Veroefftl, 1991, 6: 108-114.
7.Clauer N, et al. Iso topic compositons of clay minerals as indicators of the timing and conditions of sedimentationand burial diagenesis. Leeture Notes in Earth Sci, 1992, 43:239-286.
8.Robinson A G, et al. The ag e of illite cement g rowth, Village Fields area, Southern North Sea; Evidence from K-Ar ag es and 18O /16O ratios. AAPG Bull, 1993, 77: 68-80.
9.Girard J P and Barnes D A. Illitization and paleothermal regimes in the Middle Ordovician St. Peter Sandstone,Central Michigan basin: K-Ar, ox yg en isotope, and fluid inclusion data. AAPG Bull, 1995, 79,: 49-69.
10.Clauer N and Chaudhuri S. Clays in crustal environments, Isotope dating and tracing. Berlin Springer- Verlag,1995, 359.
11.Zhao M - W. Beitraeg e zur thermischen Geschichte, den Palaeofluidsystemen und der Diag enese des Ordos Beck-ens (China). Goettinger Arb Geol Palaeont, 1994, 62: 1-97.
12.赵孟为等. 鄂尔多斯盆地志留— 泥盆纪和侏罗纪热事件: 首次伊利石 K - Ar 年龄证据. 地质学报 (待刊 ).
13.Hunzike J C. Potassium argon dating. In: Jaeger E and Hunziker J C eds, Lectures in isotope Geology, Berlin,Spring er- Verlag, 1979, 52-76.
14.Faure G. Principles of isotope geology. New York, John Wiley & Sons Inc, 1986, 388.
15.Steiger R Hand Jaeger E. Subcommission on g eochronology; Convention to the use of decay constants in geo andcosmochronology: Earth and Planet Sci. Lett, 1977, 36: 358-362.
16.Schumacher E. Herstellung von > 99,99976 %38Ar fuer die40K /40 Ar Geochronologie: Geochron. Chimica,1975, 29: 441-442.
17.Fuhrmann U, et al. Examination of some proposed K-Ar standards:40 Ar/39 Aranalyses and conventional K-Ar da-ta. Chem Geol, 1987, 66:41-51.
18.Hurley P M, et al. Reliability of g lauconite for age measurement by K-Ar and Rb- Sr methods. AAPG Bull,1960, 44: 1793-1808.
19.Clauer N, et al. Sr and Ar isotope studies of detrital smectites from the Atlantic Ocean (DSDP, Legs 43, 48 and50). Iso t Geosci, 1984, 2: 141-151.
20.Weaver CE. Clays, muds and shales: Developments in Sedimentology. Amsterdam, Elsevier, 1989, 819.
21.Ellio tt W C, et al. Kinetics of the smectite to illite transformation in the Denver basin: Clay mineral, K - Ar data,and mathematical model results. AAPG Bull, 1991, 75: 436-462.
22.Glasmann J R, et al. Shale diagenesis in the Berg en H igh area, North Sea: Clay and Clay Minerals, 1989, 37:97-112.
23.Bonhomme M G, et al. Interpretation of Potassium- argon isotopic data related to metamorphic events in SouthWestern Alps. Schweiz mineral petrogr Mitt, 1980, 60: 81-98.
24.任纪舜等. 中国大地构造及其演化. 北京: 科学出版社, 1980.
25.聂宗笙. 华北的燕山运动. 地质科学, 1985, 10 (3): 320-333.
26.张二朋. 秦岭— 大巴山及邻区地质图 (1: 1000000) 说明书. 北京: 地质出版社, 1992.
27.Sun Z, et al. The Ordos Basin - A typical example of an instable cratonic interior superimposed basin. In: Zhu,X, ed Chinese sedimentary basins: Amsterdam, Elsevier, 1989, 63-75.
28.赵孟为, Behr H J. 鄂尔多斯盆地三叠系镜质体反射率与地热史. 石油学报, 1996, 17 (2): 1-9.
29.赵孟为. 划分成岩作用与埋藏变质作用的指标及其界限. 地质论评, 1995, 41 (3): 238-244.
30.Liewig N. Datation isotopique dlillites diag enetiques de gres reservoirs a gaz, huile et eau du Nord - Quest de1'Europe. Implications petrog enetiques et geodynamiques. These doc es- Sci, Univ Strasbourg, 1993, 238. -
点击查看大图
计量
- 文章访问数: 827
- HTML全文浏览量: 80
- PDF下载量: 484
- 被引次数: 0
下载:
