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The Israel Geological Society (IGS) meeting was held at the Kinar Resort, on the northeastern coast of the Sea of Galilee between March 24-26, 2015. According to the tradition, the first two days are dedicated for lectures and posters sessions whereas the last third day includs geological trips to enable direct observation into current research done in the past few years across the Galilee, Golan, Hermon and Kinnarot valley areas. 

  Shefa Yamim, as annually done since 2006, presented recent findings and highlights of its exploration campaign in three posters showing the delineation of the 4.5 km long alluvial placer identified in the Mid Reach of the Kishon drainage and the preliminary mineralogical analyses of the most important placer mineral, namely corundum (sapphire and ruby gem types and the industrial variety) and its possible link to the rare gem moissanite, as well as the kimberlitic indicator minerals that point to source depths of around 100 km, and deeper, for the Rakefet primary body in the Kishon catchment. These 2015 posters are the results of professional collaboration between Shefa Yamim and Prof. Bill Griffin and his team from Macquarie University, Australia, and South African kimberlite and alluvial placer geologists.

 

Poster #1         Poster #2         Poster #3


 Poster #1:

A TRANSIENT FLUVIAL PLACER IN THE MID REACH OF THE KISHON VALLEY, NORTHERN ISRAEL: 
INITIAL RESULTS OF FOLLOW-UP EXPLORATION
V. Toledo, J. Ward, M. de Wit, R. Spaggiari, H. Coopersmith, R. Wald


Using the regional geological model developed by Shefa Yamim in 2014, a 4.5 km long heavy mineral alluvial placer was identified in the Kishon River Mid Reach by international exploration methods. From these results, a local 3D geological model of this accessible target is being further developed to determine its resource potential, focusing on the DMC suite of gem minerals (diamond, moissanite, corundum = sapphire and ruby) and the Heavy Industrial Minerals (HIM suite) of non-gem corundum, zircon, rutile, ilmenite and garnet. 


 Poster #2:

High Pressure Indicator Minerals from the Rakefet Magmatic Complex (RMC), Mt. Carmel, Israel
D.B. Apter, V. Toledo, J. Ward 


One of the main sources of heavy minerals in the Kishon River Mid Reach placer is the Rakefet Magmatic Complex (RMC) on Mt Carmel. Recent research (2014- 2015) by David Apter, an experienced South African geologist-geochemist, on the kimberlitic indicator minerals (KIMs) from the RMC has further refined the depths from where these various KIMS have been derived. Although most of the KIMs point to a shallow upper mantle origin of around 100 km depth, one component – the eclogitic garnet population – is sourced from even greater depths that approach the diamond window where temperatures and pressures are higher. 


 Poster #3:

Corundum, Moissanite and Super-Reducing Conditions in the Upper Mantle Beneath the Lower (southern) Galilee (Israel)
Griffin, W.L., Gain, S.E.M., Toledo, V., O’Reilly, S.Y., Jacob, D., Pearson, N.J.

 

 

As corundum, notably the gem-quality sapphire and the non-gem industrial varieties, is the most abundant placer mineral found in the Kishon River Mid Reach alluvial placer, professional collaborative research on this mineral in primary sources on Mt Carmel is being conducted between Shefa Yamim and Prof. Bill Griffin, a mantle geology specialist at Macquarie University. This research (2014-2015) focuses on the crystallization of corundum and its probable connection with the natural rare gem mineral, moissanite (SiC) - the results of which hold the keys to some important questions facing the geology of "Deep Earth".
This poster introduced in a short video by Prof. Bill Griffin of Macquarie University, Australia.

        

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