Asian Journal of Earth Sciences1819-18862152-3509Science International10.3923/ajes.2014.17.26RezaeePayman Abas AlinejadSajjad 1201471Microscopic and field studies on the Lar formation in south west of Azarshahr
in Haft-Cheshme anticline section is due to separate of three part of marl,
marly carbonate and carbonate in this formation. According to microfacies and
macroscopic fossils in carbonate section, open marine environment were identified
from a carbonate ramp. XRD test samples related to clay marl in the low and
middle part indicated existence of clay mineral such as illite and cholorite
from clastic origin in the part of upper and middle marl and illite and smectite
are diagenetic origin in the lower marl. The simultaneous presence of the minerals
in the middle marl and the lack of smectite in this section represent of temperate
climate conditions are during deposition of the middle marl. The semi-quantitative
analysis of the XRD is indicating of smectitec increasing and illite decreasing
in the lower marl part which it may represent of a warming climate and depth
sea relative increase and it was consistent with sea level change global. Important
digenetic process of identified in these formations are include: Cementation,
primary and secondary porosity and chert nodules formations (constituents) which
the secondary porosity is more than a fracture and channel types. The existence
of these fractures has created suitable underground water aquifers in this area.]]>Adabi, M.H. and C.P. Rao,199172253267Adatte, T., G. Keller and W. Stinesbeck,2002178165196Aghanabbati, A.,20052005Assereto, R.,19667211331182Berberian, M. and G.C.P. King,198118210265Dunham, R.J.,19621962pp: 108-121pp: 108-121Mees, F., S. Segers and E. Van Ranst,2007473948Flugel, E.,2010pp: 633pp: 633Grassman, R.B. and J.L. Milet,196125325326Hardy, R. and M.E. Tucker,20042004Jackson, M.L.,19792nd Edn.,Pages: 895Pages: 895Jeong, G.Y., H.I. Yoon and S.Y. Lee,20042091930Khodabandeh, A. and A. Aminafzal,19951995Razmara, A.,2005pp: 347pp: 347Steiger, R.,19661966Stuben, D., U. Kramar, Z. Bemer, W. Stinnesbeck, G. Keller and T. Adate,2002178321345Vail, P.R., R.M. Mitchum and S. Thompson,19771977pp: 83-98pp: 83-98