Volume 7, Issue 1 (4-1999)                   www.ijcm.ir 1999, 7(1): 55-66 | Back to browse issues page

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Application of Oxygen and Carbon Isotopes in Separation of Low and High Temperature Dolomites in Northeast of Iran. www.ijcm.ir. 1999; 7 (1) :55-66
URL: http://ijcm.ir/article-1-867-en.html
Abstract:   (992 Views)

this study is focused on do lomi te s of the
Chehel-Kaman Formation (Upper Paleocene) that is located in
NE Iran. Field and petrographic studies lead to distinguish dl
and d2 dolomites. dL is fine crystals (Ie.<;ser than 10 micron) and
is associated with t:vaporatic sed ime nts. and d2 in addition to
fint: crystals. contains coarser crystals (50-RO micron) without
evaporatic sediments. Also. oxygen isotope of ell is hCltvicr than
-2.5 %" PDB and oxygen isotope of d2 is lighter than
- 6.5 %0 PDB. C'lrbon isotope in these dolomites ranges
between + 1.8 %0 to +3.5 %0 PDB. These data along with CL
o bse rvation show that d l dolomites are formed in lower
temperature (calculated temperature is 26°C) within supratidal
environment, while d2 dolomites are formed in higher
temperature (calculated temperature is more than n °C) during
burial stage.

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Type of Study: Research | Subject: Special
Received: 2017/07/5 | Accepted: 2017/07/5 | Published: 2017/07/5

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