Though it is reported to vary from zero to a few thousand ppm Re, and no generalizations are yet possible as to correlations of Re content with geological conditions of formation, .in our experience Rhenium invariably trends with porphyry Mo systems including the Hybrid Climax types that have some base metals such as with copper. . Perhaps it's so as molybdenum invariably breaches the hydrothermal spectrum into much hotter magmatic fancies evidenced by such things as molybdenum with rhenium in Unidirectional Solidification Textures (UST, rhenium having a high melting point, along with molybdenum, not occurring as the free metal but in varies oxidation states, rhenium itself having several) associated with super saturated convective melts brining the magmatic systems from very deep, magma-convectively hot, into the hydrothermal interface and depositions we call "plumes". Interestingly it has one stable isotope, Re185, shared with Indium and tellurium, which occur as rings about hybrid Climax molly porphyry such as the Unicorn deposit. Indium is an indicator of rift environments,  and by inference along with molybdenum and rhenium a direct mantle source into rhyolitic magmas evolved in thick crust of back arc rifts.  

Rhenium is not confined to porphyry type environments, and the highest values I have seen are in basin-hosted base metal deposits (including asociated with the separate mineral rhenite).

The Re content of molybdenite is highest in porphyry Cu-Au deposits and progressively lower in porphyry Cu-Mo, Mo-Cu, and lowest in Climax Mo.  Martin is right it can also be high in sediment-hosted Cu and sandstone U.  Here are some references:

Berzina, A.N., Sotnikov, V.I., Economou-Eliopoulos, M., and Eliopoulos, D.G., 2005, Distribution of rhenium in molybdenite from porphyry Cu-Mo and Mo-Cu deposits of Russia (Siberia) and Mongolia:  Ore Geology Reviews, v. 26, p. 91-113.

 Conn, G.R., and Krahulec, K.A., 2008, Sediment-hosted, polymetallic mineralization in the Uinta Basin, Duchesne and Uintah Counties, Utah, in Longman, M.W., and Morgan, C.D., editors, Hydrocarbon systems and production in the Uinta Basin:  Rocky Mountain Association of Geologist and Utah Geological Association Publication 37, p. 391-401.

 Giles, D.L. and Schilling, J.H., 1972, Variation in rhenium content of molybdenite:  Report of the 24th Session, International Geological Congress, v. 24, no. 10, p. 145-152.

 Ishihara, S., 1988, Rhenium contents of molybdenites in granitoid series rocks of Japan:  Economic Geology, v. 83, p. 1047-1051.

 Kucha, H., 1990, Geochemistry of the Kupferschiefer, Poland:  Geologische Rundschau, v. 79, p. 387-399.

 Petersen, R.G., Hamilton, J.C., and Myers, A.T., 1959, An occurrence of rhenium associated with uraninite in Coconino County, Arizona:  Economic Geology, v. 54, p. 254-267.

 Sinclair, W.D., Jonasson, I.R., Kirkham, R.V., and Soregaroli, A.E. 2009, Rhenium and other platinum-group metals in porphyry deposits:  Geological Survey of Canada, Open File 6181, 1 sheet.

 Sutulov, A., 1970, Molybdenum and rhenium recovery from porphyry coppers:  Concepcion, Chile, University of Concepcion, 259 p.

Thank you Bernhard Hochwimmer, Martin James Hughes and Ken Krahulec for sharing your observations and views.  What I could understand now is that it has a greater probability in a higher temperature environment, but cannot be ruled out in sedimentary metallic deposits also. Special thanks to Ken Krahulec for the list of references.

No, I would suspect that it is highest in lower-temperature deposits in sedimentary basins not associated with igneous intrusive bodies such as Kipushi. I think it is also high in the extremely high-grade Merlin Mo deposit (a part of the IOCG deposit spectrum) but you should double-check this.

According to web postings by Ivanhoe Australia, the Merlin Mo-Re zone contains an estimated resource of 16 Mt at 0.6% Mo, 10 g/t Re, 0.2% Cu, 3 g/t Ag at a 0.1 % Mo cutoff.  Re is contained in molybdenite. A 2009 web posting by Ivanhoe Australia announced several extremely high-grade intercepts including one with 15 m @ 1.58% Mo and 24.4 g/t Re.

The Merlin Mo-Re zone is a part of the Mt. Dore Cu-Mo deposit in the Cloncurry IOCG district (northwest Queensland, Australia). In the Merlin Mo-Re zone, molybdenite occurs as breccia-infill, massive veins, fracture infill, disseminations and stylolites. The structural host (in carbonaceous metapelite) is capped by a phyllitic unit, which appears to have acted as an impermeable trap (according to Lazo et al. Florinio Lazo, corresponding author at [email protected]).

I can't give you average concentrations of Re in individual porphyry Cu-Mo or porphyry Mo deposits. However, although the Mo grade in porphyry Mo deposits is about an order of magnitude higher than the Mo grade in porphyry Cu-Mo ores, the Re grade in ore is about an order of magnitude higher in porphyry Cu-Mo ores than in Mo porphyry ores (Michael Magyar, writ. commun., 2008).

Recoverable Re is associated with Mo in Mo concentrates from porphyry Cu-Mo ores are roasted to convert the Mo to an oxide, and the Re is scrubbed from the stack gases. Re is recovered from the Re-bearing residues in a separate process. Re grades in Mo porphyry ores are considered too low for recovery by current methods (Michael Magyar, writ. commun., 2008).

Kipushi (DRC) molybdenite is high in Re (and probable rhenite occurs). Have you checked sandstone U deposits?

I seem to remember that there is some limit on Re uptake by molybdenite (3%) - perhaps a very old article in Economic Geology

Addition to previous answer:

The Merlin Mo-Re zone is part of the Mt. Dore deposit, which is in the Selwyn IOCG district, which is 100 km south of Cloncurry. Although the Selwyn and Cloncurry districts are considered IOCG districts, the Merlin Mo-Re zone appears to represent a new deposit type (or IOCG subtype).

According to Lazo and Pal (2009), drill results indicate multiple episodes of tectonism, hydrothermal alteration and mineralization, including: 1. regional sodic-calcic alteration, 2. K-feldspar and Qtz veining, brecciation, and deposition of Ccp, Py, Sp, Cob, Bn, and trace Gn, Asp, and 3. late MoS2 with silica-albite alteration along reactivated fractures and shear zones in carbonaceous shale and meta-siltstone (in the footwall of a thrust fault, beneath Mt. Dore granite). 

Reference cited is Florinio Lazo, and Tamal Pal, 2009, The Merlin Mo-Re zone, a new discovery in the cloncurry district, Australia: Society for Geology Applied to Mineral Deposits, SGA_2009_A019 (abstract online, full text available for purchase from SGA).

Here are 2 more articles about Re, which give some ranges of Re concentrations in MoS2.

John, David, 2015, Rhenium—a rare metal critical to modern transportation: U.S. Geological Survey, Fact Sheet 20-14-3101.

Morgan, J.W., 1999, Rhenium, in Marshall, C.P., and Fairbridge, R.W., eds., Encyclopedia of Geochemistry, Encyclopedia of Earth Sciences Series, Boston, Kluer Academic Publishers, p. 547.

I asume you have:

Xiong Y & Wood SA (2001) Hydrothermal transport and deposition of rhenium under subcritical conditions (up to 200 C) in light of experimentsl studies. Economic Geology 96, 1429-1444

Xiong Y, Wood S and Kruszewski J (2006) Hydrothermal transport and deposition of rhenium under subcritical conditions revisited. Economic Geology 101, 471-478

The reference lists in these papers may lead you to other references on levels in different types of ore deposit.

I think the highest probe result I have seen was 16% Re on Kipushi molybdenite, but it was suspected that the beam had hit some rhenite.

Here is a collection of typical values, plus some extreme cases with rhenite and high Re molybdentite

http://www.sciencedirect.com/science/article/pii/S0169136804000496

https://www.researchgate.net/publication/249528285_Rhenium_in_ores_of_porphyry_copper_deposits_in_the_Urals

http://onlinelibrary.wiley.com/doi/10.1111/1755-6724.12374_41/pdf

http://s3.amazonaws.com/academia.edu.documents/782570/Re_in_molybdenites_with_corrected_figure.pdf?AWSAccessKeyId=AKIAJ56TQJRTWSMTNPEA&Expires=1476687782&Signature=VxmdHYeohoV5GafLjEdVExGtdWI%3D&response-content-disposition=inline%3B%20filename%3DDistribution_of_rhenium_in_molybdenites.pdf

Article Rhenium in ores of porphyry copper deposits in the Urals

Re my comments about Re and Re:Mo being highest in sediment - hosted ores, this not only includes carbonate-hosted base metals like Kipushi, stratiform copper like the Kupferschiefer, IOCG like Merlin, but also sediment-hosted U (as in these values from the Uinta Basin):attached

First many thanks to Ken Krahulc with co-authoring "Sediment hosted Polymetallc Mineralization, Duchesne and Uintah Counties, NE Utah". ore grade Mo has been found in sediment hosted basin sediments as well as the listed high Re contants previously mentioned. Within the Uinta Mountains and Uinta Basin a high Mo background exists with assocated high Re contents. The Unta Mountain sediments average around 50 ppm Mo and 0.05 ppm Re. The Uinta Basin sediments contain an average of 410 ppm Mo in the Uinta Formation and 154 ppm Mo in the Green River Formation and Re contents of 0.03. The highest Re content observed by myself was in sediments of the Skull Creek region of Colorado which exceded 1000 ppm Re. The sediment hosted Au deposit at Sukhoi Log has identified the sulfide mineral Rheniite in various studies also.

The Mo-Re connection is observed in IOCG, Sukhoi Log, Kipushi, Zunyi, Kupfershiefer, Pardox Basin, Praire and Green River types of sediment hosted mineraliztion. Formation waters of the various deposits ranges from sea water to acidic to highly basic. The Mo-Re contents in these sediments may also be indicators for PGE mineralization as well. Within the Uinta and Green River formations of the Uinta basin high PGE contents have been observed with Pd contents as high as 2.2 ppm in the Uinta Formation (associated with Mo-Cu-Tl-Ag ore associated with natrojarosite) and up to 752 ppb in Magadi cherts and altered tuffs of the Saline Facies of the Green River Formation and up to 64 ppb in efflorescenes of evaporated spring water from the same formation. This connection may lead to a new type of sediment hosted PGE deposit or modifiation of existing types. Hope it was of interest.

PGE in others as well - not anything terribly new, but it will be if someone gets something economic. PGE are quite high in a number of basin-hosted ores (sometimes with ore grade gold) - unconformity uranium, carbonate--hosted Cu-Pb-Zn.

You are correct Mr. Hughes. We are currently investigating an 1100 foot thick section of the Saline Facies of the Green River Formation for just such a deposit. Widespread PGE and Au anomalies in the hundreds of ppb to ore grade concentrations exist. Plus a wide array of exotic elemental and mineral assemblages usually not found in basin sediments and native elements also occur. Native elements include Fe, Ni, Au, Pd, Os, Ir, Cu, Sn, Al, Rh and Zn. Natural alloys of Cu-As, Cu-Sn, Cu-Au and Cu-Zn have been found including various minerals such as bortnikovite, fizelyite, kusachiite, berntite, roaldite, eskebornite and many others have been identified via XRD (tentative) and SEM. The mineral assemblages are very curious with many minerals only found in 1 or 2 places worldwide. The highly reducing nature of the varved Magadi chert and tuffaceous beds which are often permeated with HC's is noted. Also within the wide geochemical signature is high Mo-Re contents. Sediments deposited in the basin were derived from 4 different geologic terrains and there is a deep 60x40 mile magnetic high in the center of the basin which is thought to be an intrusive body. Basin dewatering is still occurring with high contents of Cl, SO4, B, F, NO3, Na, Li and H2S. The Mo-Re-Sn-Ni-PGE-B-F-Cl-NO3 signature may point to influence from such an intrusive body. Ore grade mineralization is found in the overlying Uinta formation which includes Mo, Cu, Tl, Ag, Pd, U, As, Sb, Te, Se and Hg. There is also evidence that much of the Au in the Green River was sources from the Uinta Basin and Uinta Mountains prior to the Northern Green River capture. The source of extremely high Mo and Re in the sediments is undetermined. The average Mo content of the Uinta Basin excluding ore grade samples is 154 ppm enriched for sampled rock by 384 times. For Re the average is 24 ppb an increased value of 34 times normal. Hope this was of value and interest.