تشکیل و تکامل خاک‌های رخنمون شده مناطق باستانی کنارصندل و دقیانوس در شهر جیرفت، استان کرمان

نوع مقاله : مقالات پژوهشی

نویسندگان

دانشگاه شهید باهنر کرمان

چکیده

خاک­ها به­عنوان اجزای مهمی از مکان­های باستانی تشخیص داده می­شوند و عموما به­عنوان نشان­گرهای چینه­شناسی مورد استفاده قرار می­گیرند. هدف از این مطالعه، بررسی میکرومورفولوژی و کانی­شناسی رس بخشی از مکان­های باستانی دقیانوس و گورستان­های باستانی کنارصندل (بستر قدیم و جدید هلیل­رود) و ترکیب اطلاعات به­دست آمده در زمینه خاک­شناسی و باستان­شناسی و نیز هم­پوشانی مناسب اطلاعات به­منظور شناخت بهتر وقایع گذشته می­باشد. به همین منظور تعداد سه خاک­رخ در نقاط باستانی منطقه حفر شد و پس از نمونه­برداری از اعماق مختلف، آزمایش­های فیزیکی و شیمیایی، میکرومورفولوژی و کانی­شناسی رسی روی آنها انجام گرفت. در بررسی نتایج کانی­شناسی رس، وجود کانی­های کائولینیت، ایلیت، کلریت، اسمکتیت و پالی­گورسکیت تأیید شد. نتایج میکرومورفولوژی، حضور نوعی فسیل جلبک کاروفیت که نشان­دهنده محیط آب شیرین تا لب شور در عصر دونین تا حال حاضر می­باشد را در خاک­رخ دقیانوس نشان داد. هم­چنین بررسی مقاطع نازک، وجود بلورهای گچ عدسی شکل و به­صورت صفحات درهم قفل شده در خاک­رخ­های کنار صندل، به­ویژه بستر جدید هلیل­رود و عدم وجود گچ در خاک­رخ دقیانوس را تأیید کردند. این موضوع می­تواند به­دلیل تأثیرپذیری منطقه کنار صندل از سازندهای نئوژن و گچی بالادست و رژیم بالارونده آب زیرزمینی باشد. وجود پوشش­های قوی رس و کلسیت در اطراف حفرات، به­ترتیب نشان­گر شرایط تکامل بالاتر در خاک­رخ دقیانوس و بستر جدید هلیل­رود بود. احتمالا به­دلیل تأثیرات هلیل­رود بر بستر قدیم خود در طی زمان­های طولانی، تکامل پایین­تر این خاک­رخ در منطقه مشاهده شد. نتایج رده­بندی خاک در منطقه باستانی دقیانوس، وجود افق آرجیلیک که نشان­دهنده بیشتر بودن رطوبت قابل دسترس در گذشته است را اثبات نمود.

کلیدواژه‌ها


عنوان مقاله [English]

Genesis and Evolution of Exhumed Soils in Konarsandal and Daqyanous Archaeological Sites, Jiroft Area, Kerman Province

نویسندگان [English]

  • E. Soleimani Sardoo
  • M.H. Farpoor
Shahid Bahonar University of Kerman, Kerman
چکیده [English]

Introduction: Several archaeologists believe that there is a relationship between cultural residuals, human beings, and soil. Soil related factors such as age index, climate change, and paleoclimate are important in archaeology. Soils could be accounted as records of invaluable information. Appropriate compiling of these data cause better understanding of soil and landscape genesis, and human activities in the past. There are two distinguished archeological sites of Daqyanous (Islamic Era) and Konarsandal (before Islamic Era) in Jiroft area. Besides, Konarsandal site is surrounded by old and new Halilrood channels. Since no data about the comparison of soil evolution in the mentioned archeological sites were available, the present research was conducted to compare soil evolution of archaeological sites using soil classification, clay mineralogy, and micromorphology in Jiroft area.
Materials and Methods: soil samples were collected from three different archaeological sites including new channel of Halilrood (pedon 1), old channel of Halilrood (pedon 2) and, Daqyanous (pedon 3). The samples were air-dried and sieved (2 mm). Routine soil physical and chemical analyses including pH, EC, soil textural class, soluble sodium, calcium, and magnesium, and gypsum and calcite contents were performed. The studied pedons were classified using Soil Taxonomy system according to morphology, laboratorial results, and field observations. The clay minerals were determined by X-ray diffraction (XRD) method after carbonates, organic matter, and Fe were removed using Jakson (1965) and Kittrik and Hope (1963) procedures. Ten undisturbed samples were selected for micromorphology studies and thin section preparation.
Results and Discussion: Pedon 1 is affected by Halilrood River sediments, that is why an old soil together with a young soil was formed. Salinity and SAR in the old soil were higher than the upper young soil. A textural discontinuity was found between the old and the young soils. Natric, calcic, and gypsic horizons were found in pedon 1 and caused a Typic Natrargid to be formed in new Halilrood channel. Natric horizon due to high Na cation was formed in pedons 1 and 2. On the other hand, salic, natric, and cambic horizons formed a Typic Haplosalid in pedon 2 (old Halilrood channel). High salinity and SAR in the upper layers caused salic and natric horizons to be formed. Pedon 3 with argillic horizon is an old polygenetic soil. Available humidity in the past caused removal of carbonates from upper layers that followed by clay illuviation and argillic horizon formation. Salinity and SAR in this soil were low and a heavy texture was found in pedon 3. Since pedon 3 showed cambic, argillic, and calcic horizons, it was classified as Arenic Haplargids. Calcium carbonate, gypsum, Fe oxides, and clay coatings were among dominant micromorphological features observed in the studied pedons. Konarsandal archeological site is located in the lowlands of Jiroft plain downward Rabor and Baft elevations. Lenticular gypsum crystals could be attributed to the solution of upward Neogene formations and groundwater close to the surface which evaporates due to capillary. Powdery calcite, Fe-oxides, and clay coating and infilling of gypsum in pore spaces of pedon 1 were observed by micromorphological investigations. Diffused clay coating around pore spaces is explainable by high sodium content and Natric horizon formation. Lenticular, interlocked plates, and infillings of gypsum were observed in pedon 1. However, gypsum with irregular shapes and low content was investigated in pedon 2. This is due to location of this pedon in Halilrood old channel. That is why pedon 2 affected by Halilrood during long periods of time is unstable and shows less evolution compared to pedon 1. Irregular and lenticular forms of gypsum show weak soil development due to low rainfall, high evaporation, and excess salt. High NaCl is reported as a requirement for lenticular gypsum formation. This form of gypsum is supported by high salinity in pedons 1 and 2. High Na and natric horizon formation in pedons 1 and 2 caused dispersion of clay and ceased formation of clay films around pore spaces.  Gypsum was not found in pedon 3 during filed and laboratory studies. Besides, gypsum was not observed by micromorphological observations. Clay and calcite coatings and calcite infillings were among the micromorphological features observed in pedon 3. Calcite coating on clay coating in this pedon could be attributed to the climate with more available humidity in the past followed by an arid climate.  Carophyte algae fossil was only observed in pedon 3. Kaolinite, illite, chlorite, smectite, and palygorskite clay minerals were determined by X-ray diffraction. Palygorskite is highly related to the parent material and climate. Pedogenic palygorskite formation from transformation of 2:1 clay minerals and/or neoformation is reported by several studies.
Due to the impact of paleoclimate with more available humidity, palygorskite was not found in Daqyanous archeological site. It seems that higher humidity in the past did not allow palygorskite formation or transformed it into smectite. Chlorite and illite are originated from parent material. Evidences of pedogenic mica minerals in arid and semi-arid environments were also found which is due to K fixation among smectite layers. Smectite with pedogenic origin is also reported by Sanjari et al. (29) in the study area. Chlorite, illite, and kaolinite clay minerals seem to be originated from parent material in the present study.
Conclusion: Laboratories analyses and micromorphology observations clearly showed weak development in Konarsandal pedons compared to high evolution of soils in Daqyanous archaeological site. The same results were also found for unstable surfaces of pedons 1 and 2 compared to stable surface of pedon 3. The stable surface provided the accumulation of clay and calcite coatings around the cavities and the formation of argillic and calcic horizons indicating high soil development. Results of the study showed polygenetic formation in soils. Soils in old Halilrood channel show high salinity and Na adsorption ratio compared to other two pedons under study.

کلیدواژه‌ها [English]

  • Argillic
  • Archaeology
  • Classification
  • Micromorphology
  • Halilrood
1- Abbaslou H., and Abtahi A. 2009. Mineralogy and micromorphology investigation of soils on calcareous, gypsiferous and saline material in Bakhtegan Lake margin, Fars Province. Proceedings of the 11th Iranian Soil Science Congress. Gorgan, Iran, pp. 456-457. (In Persian with English abstract)
2- Afra S., Broumand N., Farpour M.H., and Sanjari S. 2016. Study of physical and chemical properties of past soils in Jiroft area. 2th national conference of constant management of soil and environmental resources. (In Persian)
3- Amir Hajluo S. 2014. Explanation of role of ecological variables in life of Islamic city of Jiroft. Archaeological researches of Iran. 4: 7. (In Persian with English abstract)
4- Angelucci D. 2003. Geo archaeology and micromorphology of Abric de la Cativera (Catalonia, Spain). Catena 54: 573-601.
5- Banaie M.H. 2003. Temperature and moisture regimes maps in Iran soils. Agricultural researches and educational organization. Soil and water research institute. (In Persian)
6- Bouyoucos G.J. 1962. Hydrometer method improved for making particle size analysis of soil. Agron. Journal 54: 464-465.
7- Bronger A., Ensling J., Gutlich P., and Spiering H. 1988. Rubification of terra rossa in Slovakia: A Mosbaaer effect study, Clays and Clay Minerals 3: 269-275.
8- Burnet A.D., Fookes P.G., and Robertson R.H. 1972. An engineering soil at Kermanshah, Zagros mountains, Iran. Clay Miner 9: 329-343.
9- Choobak H. 2012. Crockery from the Islamic period-old city of Jiroft. Journal of Archaeological Studies 4(1): 83-112. (In Persian with English abstract)
10- Doran J.W. 2002. Soil mineralogy with environmental applications. Soil science of Ameriva, Inc. 677 S. Segoe Rd., Madison, W1 53711 USA.
11- Farpoor M.H. 2010. Soil data comparison in the old vs. Restored sections of the Bam citadel archeological site in Kerman, Iran. J. Agr. Sci. Tech. 12: 91-98.
12- Farpoor M.H., Khademi H., Eghbal M.K., and Krouse H.R. 2004. Mode of gypsum deposition in southeastern Iranian soils as revealed by isotopic composition of crystallization water, Iran. Geoderma 121: 233–242.
13- Farpoor M.H., Khademi H., and Eghbal M.K. 2002. Genesis and distribution of palygorskite and associated clay minerals in Rafsanjan soils on different geomorphic surface. Iran agric. Res. 21: 39-60.
14- Ghahraman A. 1997 (a). Basic botany. Volume 2. Anatomy and morphology of reproductive organs and their function in large groups from plants of world. Classification, effect and role of plants in the environment from study of plants covers. Tehran university press (2229). 539 pages. (In Persian)
15- Ghahraman A. 1997 (b). Basic botany. Volume 2. Anatomy and morphology of reproductive organs and their function in large groups from plants of world. Classification, effect and role of plants in the environment from Study of plants covers. Tehran university press (2229). 492 Pages. b. (In Persian)
16- Ghergherechi S.H., Khormali F., Mahmoodi S., and Ayoubi S. 2009. Micromorphology of argillic horizon development in loess derived soils of humid and sub humid regions of Golestan province, Iran. Journal of Soil and Water Research 40: 130-138. (In Persian with English abstract)
17- Gile L.H., and Grossman R.B. 1968. Morphology of the argillic horizon in desert soils of southern New Mexico. Soil Sci. 106: 6–15.
18- Hadian Dehkordi M. 2016. Soil science studies in historical and archaeological raw bricks of different areas in Iran. Science, Technology, Art Journal 75: 86-96. (In Persian with English abstract)
19- Helmke P.A., and Sparks D.L. 1996. Lithium, sodium, potassium, rubidium, and cesium. p. 551-574. In D. L. Sparks et al. (ed.) Method of Soil Analysis. Part 3. 3th ed. American society of agronomy. Madison, WI.
20- Henderson S.G., and Robertson R.H. 1958. A mineralogical reconnaissance in western Iran. Resource use 1td, Gla sgow, UK.
21- Herrero J., and Porta J. 2000.The terminology and the concepts of gypsum-rich soils. Geoderma 96: 47–61.
22- Holliday V.T. 1992. Soil formation, time and archaeology. Soils in archaeology: landscape evolution and human occupation, Smithsonian institution press, Washington, DC. Pp 101-117.
23- Jackson M.L. 1975. Soil chemical analysis-advanced course. University of Wisconsin college of agriculture, Department of soil science, Madison, WI.
24- Kemp R.A. 1998. Role of micromorphology in paleo ecological research Quaternary inter. 51/52: 133-141.
25- Kemp R.A. 1999. Soil micromorphology as a technique for reconstructing paleo environmental change. Pp: 41-71. In: Singh Vi A. S and Derbyshire (Eds). Paleo environmental reconstruction in arid lands. Balkema pub. Netherlands.
26- Khademi H., and Mermut A.R. 1998. Source of palygorskite gypsiferous aridisols and associated sediments from cental Iran. Clay Minerals 33: 561-578.
27- Khademi H., and Mermut A.R. 1999. Submicroscopy and stable isotope geochemistry of carbonates and associated palygorskite in Iranian Aridisols. European journal of soil science 50(2): 207-216.
28- Khodabakhshi S., Karimian Eghbal M., and Hajbari Nobari A.R. 2012. Micromorphological investigation of iron age cemetery in Kabood mosque archaeological site Tabriz, Iran. Thesis for the degree of master of science. University of Tabriz. (In Persian with English abstract)
29- Khormali F., Abtahi A., Mahmoodi S., and Stoops G. 2003. Argillic horizon development in calcareous soils of arid and semi-arid regions of southern Iran. Catena 53, 273–301.
30- Khormali F., Abtahi A., and Stoops G. 2006. Micromorphology of calcitic features in highly calcareous soils of Fars Province, Southern Iran. Geoderma 132, 31–46.
31- Kittrik J.A., and Hope E.W. 1963. A procedure for the particle size separation of soil for X-ray diffraction analysis. Soil Sci. Soc. 96: 312-325.
32- Lanyon L.E., and Heald W.R. 1982. Magnesium, Calcium, Strontion and Barium. P. 247-260. In: A. L. Page et al.(ed.), Methods of Soil Analisis. Part II. 2nd ed., Agron. Monogar. No:9. ASA and SSSA. Madison, WI.Page
33- Moriarty D. 2004. Settlement archaeology at Motul de San Jose, Peten, Guatemala. Preliminary results from the 1998-2003 seasons. Mayab 17. Pp. 21-44.
34- Nelson R.E. 1982. Carbonate and Gypsum. P. 181-196. In: A. L. Page et al.(ed), Methods of Soil Analysis. Part II. 2nd ed., American society of agronomy. No: 9. ASA and SSSA. Madison, WI.
35- Nettleton W.D., Brasher B.R., Benham E.C., and Ahrens R.J. 1998. A classification system for buried paleosols. Quaternary international 5 1/52. 175-183.
36- Retallack G.J. 2001. Soils of the past. An introduction to paleo pedology. Unwin Hyman Pub. Boston. 404 pp.
37- Sahandi M.R. 1991. Geology map, 1:250000 from Kerman, Geological survey of Iran.
38- Sanjari S., Farpour M.H., Esfandiarpour I., and Karimian Eghbal M. 2010. Evaluation evidences from micromorphological of past soils in Jiroft area. 2Th comprehensive conference of management of water resources. Shahid Bahonar university of Kerman. (In Persian)
39- Sanjari S., Farpour M.H., Esfandiarpour I., and Karimian M. 2011. Micromorphology and clay mineralogy comparison of past and present soils in Jiroft area. Journal of Water and Soil Science 15(58): 173-185. (In Persian with English abstract)
40- Soil survey staff. 2014. Keys to soil taxonomy. USDA. NRCS.
41- Sordoillet D. 2007. Anthropic sediments from neolithic to iron age settlements: interpretation according to micromorphological, archaeological and archaeological data. In proceedings of the 2nd international conference on soils and archaeology. Edited by: Boschian, G. pp. 165-171.
42- Stewart M., and Rothwel G.W. 1993. Paleobotany and the evolution of plants. Cambridge university press. 512p.
43- Stoops G. 2003. Guideline for the analysis and description of soil and regolith thin sections. SSSA, Madison, WI.182p.
44- Stoops G., and Poch R.M. 1994. Micromorphological classification of gypsiferous soil materials. In Ringrose- Voase, A.J. & Humphreys, G.S. (eds.), Soil micromorphology: studies in management and genesis. Developments in soil science, Volume 22. Elsevier, Amsterdam, 327–332.
45- Thompson M.L. 1986. Morphology and mineralogy of pre-Wisconsinan paleosol in Iowa. Soil Sci. Soc. Am. J. 50: 981-987.
46- Toomanian N., Jalalian A., and Eghbal M.K. 2001. Genesis of gypsum enriched soils in north-west Isfahan, Iran. Geoderma 99: 199–224.
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دوره 34، شماره 1 - شماره پیاپی 69
فروردین و اردیبهشت 1399
صفحه 209-223
  • تاریخ دریافت: 19 آبان 1398
  • تاریخ بازنگری: 06 آذر 1398
  • تاریخ پذیرش: 08 بهمن 1398
  • تاریخ اولین انتشار: 01 فروردین 1399